I built an armada.

Chapter 582: There is no way to get a hold of Long Xia's neck
All of those newcomers were shocked beyond words!
Even if they racked their brains, they could not imagine that the man in front of them, who looked younger than these gifted talents, was actually the elusive Teacher Su mentioned by the top military experts!

At this moment they really wanted to question it, but those top military experts kept calling him Chief Engineer Su or Teacher Su, which showed everyone the true identity of the young man standing on the podium and lecturing to everyone.

This is the legendary Chief Engineer Su!

Even though the first class was over, their heads were still buzzing and they felt as if they had been hit hard.

This fact dealt them a heavy blow.

Many of them have completed bachelor's, master's and doctoral degrees, and many of them are even recommended students. They can be said to be true chosen ones and top scientific and technological talents.

They originally thought that after entering here they could still consider themselves geniuses, could easily do the work here, and could even achieve results easily.

It was not until they were assigned to various military experts and started to get involved in the scientific research projects in the base that they realized how arrogant they were and their self-confidence suffered a great blow.

Later, they felt that the legendary Chief Engineer Su was, after all, an elderly and kind-hearted man, which was in line with everyone's imagination and could make them feel more comfortable.

They even thought of a set of words to comfort themselves. Even if they could not compare with the other party academically, they were young. With their own intelligence and wisdom, maybe when they reached the age of "Chief Engineer Su", they would also be experts at the level of a master in the field.

But who could have thought that the so-called kind old man was just their imagination and did not appear.

The man standing on the podium was too young. Even if they dared to pick someone, he would be older than Chief Engineer Su.

This directly broke their defenses, because in front of Chief Engineer Su, almost all the things they were proud of were not worth mentioning.

Whether in terms of age, experience, or knowledge, they lost miserably and did not have any pride at all.

This person is truly a dragon among men, a true chosen one of heaven!

At the base, they had all heard from the grassroots engineers that Chief Engineer Su was a figure highly respected by the heads of the three armed forces and was treated as a treasure.

And what do they have?
Su Dingping didn't care what the newcomers were thinking, nor did he have the leisure time to care about those things.

After talking about the machine gun issue, Su Dingping then corrected a number of military experts' misconceptions about the subsequent scientific research direction of fighter jets before officially entering the next lecture session.

"The topic of today's lecture is about wind tunnel technology."

"Today, you will discuss how we can build our own complete third-generation wind tunnel center with completely independent intellectual property rights, as well as a series of problems encountered by engines in wind tunnel testing."

When the top experts present heard this, they were all so shocked that their eyes widened and their ears stretched out like rabbit ears.

Ever since the White Bear Tribe unilaterally scrapped the agreement and forcibly removed the wind tunnel equipment some time ago, the Air Force's related research and development has entered a stage of stagnation, making them very helpless.

As a result, the Air Force had to allocate part of its resources to deal with the manufacturing issues related to wind tunnel test equipment, while at the same time having the resources to overcome the manufacturing problems of the engines.

The Air Force doesn't have the strength to do both at the same time, even if given a few more years.

No matter which one it is, it is extremely difficult for the Air Force. It is no exaggeration to say that it is as difficult as climbing to the sky.

And now Su Dingping actually teaches relevant technical issues of wind tunnels in class, and starts with the third-generation wind tunnel.

So confident?
Could it be that the wind tunnel has been completed? Is it true or false?
As a result, an expert stood up excitedly and asked directly: "Chief Engineer Su, have we finished our domestically produced third-generation wind tunnel test equipment?"

Su Dingping nodded slightly, answering his question.

But just such an easy nod in response shocked all the air force military experts sitting below!

Now that the third-generation wind tunnel test equipment has been completed, there will be no problem in the construction of the wind tunnel test center.

According to their understanding, construction is probably already underway?

How long has it been?
Isn’t the speed too fast?
Doesn't it mean that just as the White Bear Tribe withdrew their equipment, the country has already completed its own third-generation wind tunnel equipment, which is unbelievable for them.

Isn't this equivalent to telling the White Bear Tribe that your stranglehold on us is of no use to us!
How could they know that Su Dingping had already started researching wind tunnel equipment and was just now planning to build one for himself.

The reason why it took so long was simply that his energy was dispersed and he couldn't use it all to study the wind tunnel test equipment, otherwise the speed would have been even faster.

"Okay, none of this matters."

Su Dingping seemed very relaxed. "After the construction is completed, you will all have the opportunity to participate in the research of related topics. Well, our main task now is to give lectures."

After that, he distributed the relevant information about the wind tunnel.

After everyone had received the materials, he continued his lecture.

"Unlike ordinary wind tunnels, the difficulty of hypersonic wind tunnels lies in the extremely demanding air velocity and pressure conditions they need to simulate."

"Specifically, a hypersonic wind tunnel needs to reach wind speeds of 10 to 18 times the speed of sound, which makes it impossible for traditional fan drive methods to meet the requirements. In order to achieve such high flow rates, the design and manufacture of wind tunnels require the use of special materials and technologies."

"In basic physics, when the temperature rises rapidly on one side, the volume of the air expands, but its mass remains the same, which causes the density to decrease."

"When the temperature on the other side drops sharply... then an air difference will be formed! The formation of wind is caused by the pressure difference of the air. You all know this."

After a brief pause, Su Dingping began to tell the story again.

“…When building an advanced wind tunnel, you need a high-pressure gas cylinder to store some high-pressure gas, and use the ultra-high compressed air in the high-pressure gas cylinder to replace the electric fan to work.”

"In fact, this is not enough. At this time, there is a pressure difference in the air, but it has not reached the maximum pressure difference."

"When is the maximum pressure difference? If the pipe corresponding to the high-pressure gas cylinder is a vacuum, then the pressure difference will reach the maximum."

"So at this time, we have to pump out the air in the pipe."

"After the vacuum pipe is formed, once the high-pressure gas cylinder is opened, the high-pressure gas whistles into the pipe, eventually forming a higher wind speed."

Su Dingping spoke incessantly, and the people below, no matter they were experts or newcomers, pricked up their ears and listened attentively, not daring to be absent-minded or distracted in the slightest.

They all knew very well that the things Su Dingping explained were the core technologies of wind tunnel construction, which would never be told abroad, so there was no place to learn them.

Su Dingping, who was on the podium, glanced at everyone and continued his explanation.

"Turn to the next page and we'll continue." "After the vacuum pipe is formed, once the high-pressure gas cylinder is opened, the high-pressure gas quickly rushes into the pipe, eventually forming a higher wind speed."

"In this case, we need to build a key thing, which is a vacuum ball. In fact, there is nothing inside this ball."

"Of course, a vacuum ball alone is not enough. A complex heating system needs to be built."

“The bigger the wind tunnel, the more complicated the heating system becomes. In addition to heating, there must be an air dryer and the air humidity must be accurate.”

Next, Su Dingping continued to explain again.

"For example, when the experiment is five to ten times the speed of sound, the specific humidity of the air is 0.00075 pounds of water per pound of air. Then, there will be a 1% error in the force change generated by the model in the wind tunnel..."

"Of course, this is not enough."

"The wind speed of a wind tunnel created by pressure difference is still not fast enough, because its maximum limit is about five times the speed of sound. Therefore, if we want to increase the wind speed of the wind tunnel, we must find another way to think of other methods."

Having said this, Su Dingping paused and looked at everyone.

"Everyone, please think about it. Is there any better way?"

He directly threw the questions to those who were listening attentively and asked them to think about it.

Because this involves the relevant knowledge of the fourth-generation wind tunnel, building a new generation of wind tunnels and developing supersonic weapon systems.

For a moment, everyone below looked at each other in bewilderment.

After a moment of silence, a brave person stood up and said, "Teacher Su, can we use high voltage current to create a pressure difference..."

"I think we can use the Tesla effect of electromagnetic reaction... But this is still a little bit lacking, and it is too difficult to achieve."

"Electromagnetic reaction is impossible to achieve. We don't have the technology yet. We don't know when we can build it."

After discussing it for a long time, no one could come up with something that could be put into practice. Either it was too difficult or it just remained a fantasy.

Naturally, there was no consensus, and finally everyone turned their attention to Su Dingping.

Su Dingping smiled casually and continued his lecture.

“In fact, this already involves the content of the fourth-generation wind tunnel, which we can call a shock wave wind tunnel.”

"In fact, it is very simple. It uses explosion."

"The explosion creates a shock wave, and the shock wave pushes the air, and the shock wave pushes the air faster than the air moves."

"So in this way, the air will be compressed, and the pressure of the compressed air will be greater than the compressed air we produce... In the end, we can get a wind speed of forty times the speed of sound or higher..."

The explanation of the construction theory of the new generation wind tunnel was easy to understand and the audience listened with great interest.

They kept taking notes carefully, for fear of missing any knowledge points.

The Longxia tribe is not only building the third-generation wind tunnel for heavy tests, but also, as it stands, is already researching the fourth-generation wind tunnel. It can be said that it has suddenly become one of the best in the world.

For those air force military experts, it is like a treasure.

After a while, a new talented doctoral student stood up and said, "Honestly, I have a question."

"Okay, you say."

Su Dingping raised his hand and gestured to the man.

He still likes it very much. He can ask questions in class to prove that others are listening carefully and have their own thoughts.

“How to determine suitability based on the similarity between the Reynolds number (Re) and Mach number (Ma) in wind tunnel testing and actual flight?”

The talented doctoral student immediately asked the question.

This has reached a very difficult and profound field of knowledge. The new graduate students and doctoral students feel overwhelmed when they listen to it, and the interns from the research institute are also confused.

Even many professors fell into deep thought and were considering this issue.

Without waiting for Su Dingping to speak, the new doctoral student started asking again.

"It is well known that two flows are similar when Re and M are equal and their streamlines are similar. In other words, if you want to simulate the flow of a real machine, the Reynolds number of the model machine in the wind must be equal to the actual one."

"…If a subsonic cruise aircraft is reduced in size, in order to maintain the same Reynolds number, the flow velocity must increase and exceed the speed of sound, causing the lift-drag characteristics to change greatly. How can this be simulated experimentally?"

"How do we determine the flow rate in the experiment? Do the Reynolds numbers have to be equal? ​​How do we estimate the parameters of the real machine if the Reynolds numbers are not equal?"

"Also, if only one of the Reynolds number and the Mach number is equal, what effect will it have on the experimental results?"

The other party's mouth was firing like a machine gun, throwing out a series of questions. An ordinary professor would have been confused by what he heard. The questions were so professional that even an ordinary professor would have to think for a moment.

Su Dingping was very happy to meet a young man with some wind tunnel technical skills.

The more young people like this there are, the happier he is.

At least people are thinking about it and are very interested in wind tunnel technology and aerodynamics.

Su Dingping smiled and pressed his hand, motioning the doctoral student to sit down.

"To be honest, I am very happy that he can raise so many questions. I am also happy to see that you think deeply about the relevant issues."

"Okay, let's get to the point."

For some reason, the doctoral student felt extremely happy and proud after hearing the praise from Su Dingping.

(End of this chapter)