Looking at Xu Yun who had just been lifted up from the ground and grinning crazily with pain on his face, Qian Wushi couldn't help but asked with concern:
"Comrade Han Li, are you really okay?"
"How about I contact the staff hospital now and ask Dr. Lin Yu or Comrade Caihong to come and take a look at it?"
"..."
Hear this.
Xu Yun in the wheelchair was almost bursting into tears from the pain, but he still shook his head quickly:
"Director Qian, no need, no need, I really have nothing to do."
"Look, I knelt down...ahem, the knee I knocked down happened to be uninjured and is a sound bone."
"Hiss...it hurts a little bit, but it's just a bruise. It'll be fine after a while."
Master Qian was still a little worried when he saw this, so he bent down and took a few glances himself.
After confirming that there is indeed no wound on Xu Yun’s knee.
He just pondered for a moment and reluctantly agreed to Xu Yun's idea of staying at the scene:
"Okay, then don't contact the hospital yet."
"But Comrade Han Li, if you feel uncomfortable in any way, please don't hold it in, you must say it, do you understand?"
Not an exaggeration.
At present, Xu Yun's importance can be called a national treasure, even more than that of Gungun. If Xu Yun is a mummy, then his rarity is equivalent to that of Ramesses III of Egypt...
Oh, maybe Cleopatra VII too...
Having said this.
Master Qian couldn't help but glance at Xu Yun again, and asked with a strange expression:
"Speaking of which, Comrade Han Li, you are sitting so well in your wheelchair, why do you suddenly fall off?"
"...Stop talking."
Xu Yun shook his head with a wry smile, and said as if he was possessed by Mrs. Xianglin, without focus:
"I deserve this, I'm so stupid, really..."
Xu Yun's words are not self-deprecating.
He felt really stupid.
221 base,
Round-faced middle-aged man,
math group,
Nicknamed ‘greater than’,
Plus the current time...
With these keywords in front of him, Xu Yun didn't even realize the true identity of this person...
Then he really deserved the fall.
This is Yu Min...
In the later generations of Xu Yunlai.
There is a saying that has always been popular on the Internet:
China's local physics community has never produced a giant, and the mathematics community is even worse than the physics community.
This sentence is actually not correct.
For example, in this era, a genius in mathematics and physics has appeared in China.
He is Yu Min.
That is the legendary...
The father of the Chinese hydrogen bomb!
If Yu Min's life is described in an online novel, it can be summarized in this sentence:
He was a god-sent son born from the fate of the country at the time of calamity after the founding of China.
Yu Min is a native of Lutai Town, Jinmen City. He studied in the Physics Department of Peking University and only received relevant domestic education from beginning to end.
After graduation.
Yu Min joined the newly established Institute of Modern Physics of the Chinese Academy of Sciences, officially starting his life that was even more outrageous than cheating.
He first founded my country's first nuclear physics training class with Professor Yang Liming of Peking University and published my country's first monograph on nuclear theory.
The influence of this work is so profound that until 2023, many nuclear theory majors are still using this book intact for teaching...
Then in the process of developing nuclear weapons.
Yu Min was ordered to take charge of hydrogen bomb research.
To know.
Unlike the atomic bomb.
Although the manufacturing of atomic bombs was relatively difficult, there was still more or less data to refer to, and there were some traces to follow.
For example, the explicit formula of a chain reaction is not a secret; what is difficult is the detailed derivation.
But the hydrogen bomb is different.
There was no information about the hydrogen bomb at that time - not even a single English letter.
So Yu Min’s difficulty starts off as hell.
for example.
Now here is some information for you readers:
Cool, there is a thing in the world called a hydrogen bomb. The principle is roughly based on nuclear fusion, that is, atomic nuclei are twisted together under high temperature to release energy.
Well, there are only so many conditions - and then let you go and get this thing out.
What's outrageous is...
Yu Min actually agreed.
What's even more outrageous is that Yu Min finally made a hydrogen bomb under such circumstances...
Students who have studied hydrogen bombs should all know this.
There are currently only two configurations of hydrogen bombs.
One is Taylor Ulam....that is, T-U configuration.
The other is the Yu Min configuration.
Of course.
No one has ever seen real data on the above two configurations, and no country has disclosed any principles about hydrogen bombs.
But one thing is certain.
That is, the first hydrogen bomb test device across the sea weighed more than 80 tons, and the first droppable hydrogen bomb weighed 21 tons.
Basically, planes can only fly across the sea.
And guess how heavy the rabbits’ first hydrogen bomb was?
The answer is only 1 ton.
Moreover, in the first hydrogen bomb test at that time, the Rabbits dared to use airdrops to directly achieve miniaturization.
Just this.
It is enough to prove that the principles of rabbits are completely different from those across the sea.
in 2014.
Yu Min won the highest national science and technology award.
However, it is not his honor to win this award, but the honor of the country's highest science and technology award.
Yu Min has remained anonymous for decades, leading a team that has made huge contributions to the development of China's nuclear technology.
Not only did it free New China from the haze of nuclear blackmail, it also gave the Chinese people the ability to manufacture advanced nuclear weapons on their own, which was an unparalleled achievement.
But all this was not known to the world until he was 72 years old.
correct.
By the way.
In Hearts of Iron 2, the best World War II grand strategy simulation game on the planet.
If you successfully unify China, you will still face China, which has poor nuclear technology capabilities.
At this time, the nuclear weapons technology team across the sea owned Oppenheimer.
The German science and technology group includes Heisenberg,
Even neon has Yoshio Nishina.
This chapter is not over yet, please click on the next page to continue reading! So who is there in China?
p agency told everyone an answer:
Yu Min.
And count it in terms of time.
At this time, Yu Min was in a relatively unemployed state:
He was transferred to the light core team not long ago, but he will not be officially appointed by Qian Bingqiong until November this year.
So during this period.
Yu Min started working as a temporary worker in the base's calculation team.
That's right.
Arithmetic groups, not other physical groups.
How strong is Yu Min’s math ability?
When he was studying, Peking University once organized a mathematics examination.
At that time, students in the physics department scored an average of 20 points, the top students in the mathematics department barely scored 60 points, and Yu Min scored 100 points. This is true and is recorded on the official website of Peking University alumni records.
In fact, Xu Yun knew all this information. After all, Yu Min's position in the entire nuclear weapons research process was too important.
It's one thing to know.
Being aware of it is another matter.
Ever since.
After Yu Min revealed his identity, Xu Yun, who was unprepared, was so surprised by being 'greater than'.
Just like Wang Lang, he fell off his horse...ahem, fell off his wheelchair.
At the same time, the moment he came back to his senses.
The first thought that came to Xu Yun's mind was not whether there were any fractures, but whether his kneeling posture was not standard...
After all, this guy is a real big shot, and it's not shabby at all for him to kneel down.
"...."
After a while.
Xu Yun took a deep breath, turned his head, and said to Yu Min in front of him:
"Big...bigger than comrades, right? I've read your derivation, and it's indeed very subtle and reasonable."
"Thank you very much for your tip. In this way, our equation fitting can continue."
Hearing Xu Yun's words.
Da Da scratched his hair shyly, and could vaguely see the shadow of the humble old man later:
"It's good if I can help, it's good if I can help."
"Actually, Comrade Han Li, I'm not going to hide it from you."
"After seeing the weather Doppler radar you designed, I have always wanted to get to know you - its principle is really exquisite."
"So if there is a chance in the future, can I ask you a few questions? Don't worry, I will leave before dinner every time, and you will never miss a meal."
I heard the word "ask for advice".
Xu Yun suddenly felt as if he was electrocuted, and his scalp was numb as he raised his hands:
"Don't hesitate to ask for advice. Comrade Dao, your math level is much better than mine."
"If you don't mind, let's just discuss it normally. Maybe I'll ask you some questions..."
joke.
Don't talk about Xu Yun.
Even in the Chinese scientific research community in 2023, there are not many people who are worthy of Yu Min's advice - this is still considering the situation of meritorious people like Yang Lao and Wang Lao.
If you put aside these academic abilities alone, I'm afraid you can only find that kind of person on Facebook.
After all, this is the ultimate wall hanging who can simulate nuclear explosions in his mind...
And the other side.
Seeing Xu Yun's awkward reaction that he had never seen before.
Master Qian couldn't help but glance at Yu Min who was standing aside, with a thoughtful look on his face...
Then Xu Yun and Yu Min tried hard to pull each other off, and finally convinced the big boss to take the next step on a relatively equal footing.
A few minutes later.
Xu Yun and Yu Min returned to their original positions again, and Master Qian also went aside to continue his derivation.
"Trong Da Da, now that the cross-sectional state expression has been solved, it is time to perform numerical calculations of the fitted flow field."
Xu Yun held the pen and thought for a moment, then said to Min:
"More than Comrade, do you have any thoughts on this part?"
Yu Min has a relatively humble personality in life, but now that it involves technical discussions, he doesn't hide his clumsiness.
Yu Min quickly picked up the pen and wrote down several parameters on the paper:
Ma=0.729
AoA=2.92°
Rec=6.5x106
Then he put down the pen with a click, pushed the piece of paper in front of Xu Yun, and said:
"Comrade Han Li, these are the experimental parameters I calculated just now. How about you put them in and take a look?"
See this situation.
Xu Yun instantly had a question mark on his face:
"???????"
At this moment.
Xu Yun suddenly felt a strong desire to complain:
Who the hell is a time traveler?
To know.
Since Synge published an article titled "Aerodynamic symmetry of projectiles" in 1949, the physics community has begun to derive mathematical expressions of aerodynamic parameters.
That is to say, the aerodynamic coefficients can be expanded into the form of a series expression, and the low-order terms can be made practical by cutting off the high-order terms and retaining the low-order terms.
As for the so-called fitting.
It refers to the specific expression of expanding the series...that is, the important thing is to determine the coefficients.
Then use the state variables to substitute in to solve the aerodynamic parameters of the unknown state, which is a high-solution process and very complicated.
To describe the above in human terms is...
First use a series of equations to derive another equation, and then solve the equation to get the final answer to the three variables XYZ.
And what about the current situation.
It's equivalent to the first step.
That is to say, Xu Yun finally derived the expression of another equation, and asked Yu Min about his ideas for solving this equation.
Follow the development of traditional stories.
Both parties should come up with multiple ideas for solving the equation and then discuss their feasibility one by one, and their relationship will slowly improve during the discussion.
Finally, a direction is determined and the resultant force begins to be solved.
Then, after a period of time, they both stop writing and gently push the answers in front of the other party for exchange testing.
In the end, I found that the answers were exactly the same. They looked at each other and laughed as if they were meeting their close friends...
But at this moment.
What Yu Min did was equivalent to shouting about a der.
Then he threw several solutions to the equation on the table and told Xu Yun that you should work backwards to verify them.
This chapter is not over yet, please click on the next page to continue reading! If you are right, I will go to play basketball. Everyone else has arrived at the stadium and is in a hurry...
(╯‵□′)╯︵┻━┻!!!
Is this tmd playing tricks?
He was not even sure of his thoughts, but Yu Min actually came up with the answer directly...
To know.
Qian Wushi's experimental report was previously considered a top secret in the country and was guarded by a dedicated person. Even if Qian Bingqiong wanted to check it, he had to declare it in advance.
In other words.
Yu Min would only know the existence of the report and see the details for the first time after being grouped into groups.
And in this short period of more than ten or twenty minutes.
Not only did he clarify the specific ideas, he also listed the equations and solved the answers.
In the end, there was even time to watch a show next to Xu Yun?
This tmd is not a scam...
But considering that Yu Min can create a sensitive configuration, these things don't seem so difficult to accept?
After all, compared with Yu Min's configuration, the difficulty of this situation is still far less.
Then Xu Yun thought of U2 across the sea.
I don’t know which U2 would be so unruly... Or maybe the European Emperor would be lucky enough to die in the hands of so many Tongtiandai...
This life is truly worth it.
"...."
After a while.
Xu Yun put away his inner surprise and returned his attention to reality.
After all, surprise is still a surprise, and what needs to be done still needs to be done.
So soon.
Xu Yun picked up his pen and calculated the three sets of values given by Min.
Among the parameters given by Yu Min.
Ma refers to the Mach number,
AoA is the angle of attack,
Rec is...
Critical Reynolds number.
The Reynolds number is just what it sounds like, it is a numerical value named after Reynolds.
At that time, Reynolds discovered based on a large number of experiments that the transformation process from laminar flow to turbulent flow was very complicated.
This process is not only related to the flow velocity v.
It is also related to the fluid density p, the viscosity coefficient μ and a certain characteristic length d of the object - such as the diameter of the pipe, the width of the wing, the radius of the sphere in the fluid, etc.
Finally, he combined the above factors and introduced a dimensionless quantity pvd/μ.
Later generations named this dimensionless parameter "Reynolds number".
The flow state of the fluid is determined by the Reynolds number. When the Reynolds number is small, it is laminar flow, and when the Reynolds number is large, it is turbulent flow.
That is...
The greater the flow speed, the longer the distance across the surface of the object, and the greater the density, the easier it is for the laminar boundary layer to become a turbulent boundary layer.
on the contrary.
The greater the viscosity, the more stable the flow will be, and the less likely it will become a turbulent boundary layer. (Recently, there are more readers coming because of anti-theft. Let me explain here. This concept of throwing is really not hydrology, but will be used later, but
If I throw it out all at once later, I don’t need to write the main text for the entire chapter, so I throw it out every few chapters.)
Then very quickly.
Xu Yun then substituted these parameters into the equation.
"MA0.729....AoA=2.92°....Rec=6.5x106...."
"Then the free flow parameter is 288.15...."
"The boundary condition refers to the penultimate formula in Chapter 559, and the general parameter is 0.61..."
"Finally substituting the convergence criterion, the surface pressure distribution is 6.66632..."
"The first formula matches, and energy is conserved between sections, so the calculated L0 should be 0.231."
Write here.
Xu Yun stopped the pen in his hand and began to compare Qian Wushi's forms.
The actual sample of Qian Wushi's form comes from the ballistic wind tunnel across the sea. Today, there are only three countries in the world with ballistic wind tunnels, and China is not included.
This is why this information is classified as such a high-profile file.
Then very quickly.
Xu Yun found the corresponding L0 value of MA=0.7 in the document.
The obvious thing is...
0.229!
no doubt.
These three values that Yu Min came up with are indeed accurate solutions.
Xu Yun:
"...."
Live in vain.jpg.
Then in the following time.
A very strange style of painting appeared in Xu Yun's group, and the conversation was almost like this:
"It is necessary to do a written calculation of the Kolmogorov scale energy spectrum in areas B and C of medium gaps, so the dissipation rate must be calculated first..."
"No need to calculate it, it's 17.63%. Comrade Han Li, please check it."
"...greater than, the wave number is formed by the accumulation of all large-scale components of the velocity, v^k is the Fourier coefficient of the velocity, so multiple scalings are required..."
"No need, Comrade Han Li, we just assume that for any fixed K, the cumulative dissipation of all scales greater than 1/K should be 2νΩK≤2νK2, where E→0, when ν→0, ΩK can be directly
We figured it out...here, look."
"Then this irregular hourly velocity field..."
"This is also simple. Assume the shear stress of a solid wall on the fluid, then write the product of the contact area and then derive it, wouldn't it be enough?"
be honest.
From the first time traveling to the present.
For the first time, Xu Yun had a subtle emotion of doubting life:
He seemed to have transformed into the aborigine being carried away, and Yu Min beside him was the time traveler.
Almost whenever Xu Yun mentions his ideas.
Yu Min can quickly give the corresponding answer, and the accuracy is very high. Even if he makes a mistake, he can quickly correct it.
Ever since.
With Yu Min’s ‘assistance’.
Xu Yun successfully solved the problem he was responsible for with almost no effort.
No wonder so many people like to win by lying down, this feeling is really good...
...........
Ten minutes after Xu Yun's team completed the calculation task.
The back pressure ratio that Master Qian was personally responsible for also had results.
Back pressure ratio.
Military or aerospace enthusiasts should all know this.
This chapter is not finished yet, please click on the next page to continue reading the exciting content! Whether it is large aerospace liquid rockets, some modern tactical missiles, or even modern third-generation and later fighter jets.
The flames they emit after turning on the afterburner...that is, the tail flames, mostly appear to be segmented.
This is a physical phenomenon in which the jet velocity exceeds the speed of sound when the aircraft's engine is fully powered.
This phenomenon is technically called a Mach disk or a Mach ring. It is a translation discrepancy and a very common interpretation problem.
It is caused by the shock wave generated by the tail jet, forming a continuous expansion wave and compression wave system in the air.
The mathematical calculation and derivation of these expansion waves or compression waves is related to the back pressure ratio.
True.
The concept of back pressure ratio is commonly used in the nozzle of jet aircraft and in the field of missiles... Especially for small missiles, there are not many cases where back pressure ratio is considered.
But don't forget.
The missile designed by Qian Wushi and his team this time requires an extremely fine aerodynamic structure, and the back pressure ratio is related to the placement of supersonic axisymmetry in real scenarios - the specific equation has been mentioned before.
Therefore, the calculation of the back pressure ratio has become a very critical link.
Then Qian Wushi placed his calculation results and Xu Yunyumin's results side by side in front of him and began to summarize them.
"R(l)/l = 0.1....V/l^3 = 0.02...."
"The distribution of flow field parameters and the shock wave interval on the leading edge surface are 0.4, 2.6, 2.9..."
"The total contraction ratio of the precursor air inlet is 6.2, which includes the compression part of the precursor. The total contraction ratio of the air inlet is 5.2, and the internal contraction ratio is 1.6..."
"The distribution of the mass-weighted Mach number is around 3.0, the pressure rise coefficient is basically above 20, the total pressure recovery coefficient is the largest when the angle of attack is equal to 2°, and the other states are close to 0.6..."
Qian Wushi's eyes quickly passed over these parameters, and his slender, calloused right hand quickly sketched on the calculation paper.
Each time a parameter is scanned.
His right hand will draw the corresponding figure within five seconds.
This is a supernormal ability that he has spent thirty years accumulating. If he didn't have some ability, how could Qian Wushi be so valued by the other side of the sea?
If Yu Min is a human computer.
Then Qian Wushi is a human-shaped analyzer.
From the moment each parameter enters the retina and is imaged at the rear, it is analyzed at high speed by Qian Wushi's brain.
Look at Qian Wushi's pen tip moving rapidly on the paper.
Xu Yun, who was watching, suddenly felt another emotion in his heart.
This emotion is somewhat subtle.
It is not a desire to complain, nor is it an ethereal touch - Xu Yun is not that emotional yet.
How to describe this emotion...
Smart classmates should all still remember it.
In the past three dungeons, Xu Yun had organized one or more rounds of mathematical operations.
For example, in the Mavericks copy.
He and Mavericks had deduced the simplification of binomials and discussed the problem of infinitesimals.
In Lao Su's copy.
He worked with Jia Xian and others to calculate the parameters of the telescope, and after Xiao Zhao seized the throne, he found hundreds of ancient people who were proficient in mathematics to calculate the design parameters of the aircraft.
In the wheat copy.
Xu Yunze, together with Gauss, Riemann, Dirichlet and others, calculated the orbit of Pluto, and a year later calculated the orbit of Pluto.
But no matter which of the above calculations.
Xu Yun can't be said to be carrying alone, but he is almost always in a leading position...or to be more precise, he is in a guiding position.
During these processes.
Xu Yun is just like the jade seal that was rewarded in the 1850 copy. He is actually a little lonely inside.
There is no traveler around him who can truly match his frequency, not even Gauss Riemann and Wheat.
But this time it's different.
Although Xu Yun still pointed out certain directions, there were people around him who could keep up with his thinking and even optimize his thinking.
When the identity of these people is added with the attributive [ancestors of New China]...
Xu Yun suddenly found that there was a little warmth around him, instead of the noisy cold wind and the lonely starry sky.
Maybe this is...
Collective power?
...........
Twenty minutes later.
A sketch with simple lines but complex structure suddenly appeared in front of the three people.
This is a very special structure.
It uses the streamline tracking method to obtain the minimum wave resistance cone guide waverider from the flow field based on the approximate theory of the minimum resistance axisymmetric body.
The waverider shock wave exhibits an outwardly convex outer cone characteristic and closely fits the front edge of the three-dimensional inlet lip.
At the same time, the waveriding characteristics of the waverider itself are not affected by the inlet placed inside its flow field, and the shock wave is close to the side edge of the front body;
The shock wave of the inlet itself exhibits inner cone characteristics, is concave inward, and is close to the leading edge of the inlet.
The three-dimensional inwardly rotating inlet is obtained by tracking the cone flow field within the axially symmetric curved surface through the capture profile that matches the waverider.
At the same time, the profile gradient technology is used to obtain a circular internal compression channel with a circular outlet of the isolation section, and the flow capture rate can reach 0.99.
To describe it in later terms is...
[Total pressure recovery coefficient and pressure rise characteristics are within a good range.]
to be honest.
Since the results of the other three groups have not yet been compiled, the structure of this sketch is incomplete:
What it depicts is only the internal and external structure of the missile coupling port.
But in the eyes of professionals like Qian Wushi.
It is an extremely exquisite first version design drawing of a missile.
As long as [this happens again and again], it can become a real missile.
In other words...
In the missile design process, the most critical link has been solved.
Wuwuwu——
And not long after Master Qian finished drawing the design.
A rapid siren sounded outside the window.
Hear this.
Xu Yun, who was still looking at the design drawings, subconsciously raised his head and looked out the window, while frowning slightly:
"It's strange...it's only been a few days, why are U2 here again?"
This chapter is not over yet, please click on the next page to continue reading the exciting content! "Nothing surprising."
As soon as Xu Yun finished speaking, Master Qian next to him waved his hand and said indifferently:
"Probably because some people couldn't find me in the capital, so they rushed to the northwest to have a look."
"Similar situations are quite common. Last time I secretly went to Zhejiang Province to eat West Lake Vinegar Fish, U2 went around the northwest for three whole days."
Xu Yun was stunned for a moment.
Some people can't find money?
But soon.
He then understood what Master Qian meant.
right.
Starting with the advent of weather Doppler radar.
Sun Junren, Luo Peilin, Mr. Wang... In addition to the Qian Fifth Division this time, many batches of "reinforcements" have arrived at the base from the capital.
This lineup looks quite luxurious, but a situation will occur in the capital:
The porters, vendors, or noodle shop owners at their doorsteps... In short, there must be some people with serious professions but malicious intentions who find that the target they want to track every day is missing.
In this situation.
It is reasonable to increase the frequency of U2 sailing across the sea.
Think of this.
Master Qian couldn't help but stood up from his seat and walked to the window.
He first looked out the window at the sideline team members who were moving bedding and other 'props' to cover up the radar, and then looked up at the sky.
His eyes seemed to have traveled thousands of kilometers through the blue sky above the base, and he saw a black reconnaissance plane heading towards the base:
"Hurry up and fly more often... After all, before long, you will never have the opportunity to enter our airspace, forever..."
........
Note:
If you still have monthly votes, please vote for them. If you can maintain the level of monthly votes, you can get 1,000 achievement points next month, and this book should be able to get one star of glory.
Although one-star glory is a bit bad now, so much so that a gold alliance can directly earn two stars, but there are not many books that really do not rely on krypton gold to get one star. Ours is a real one-star medal, so please vote for it!
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