Chapter 998: Damn it, you can take the world by storm
In fact, there are better options, but Gao Zhendong did not choose them. It is useless if they are too high, and the other parts cannot cooperate. Now this one can roughly reach the level of LPY-13FI, and can increase the military thrust to 4.5 tons and the afterburner thrust to more than 6.6 tons, which can already beat all R13 series engines including R300-11. As for the future, it is the business of Mr. Wang and his team.

After all, the original LPY-13FI already has higher thrust than the AII type that was first used on the pointed-nose 8, which is definitely enough in this day and age.

"Chief Engineer Gao, we're taking these things away, hahaha. You, you, both of you, copy down everything on the blackboard, without making a single mistake."

Although it is impossible to copy it, Mr. Gao's structure and material design drawings are of great guiding significance. As a material researcher, he naturally knows which materials are used where and which ones are most suitable in terms of mechanical properties. What Mr. Wang has to do is to refine the details of each part and determine whether their thermal performance meets the requirements of engine improvement.

In fact, there was no need for Mr. Wang to say anything, the comrades who came with him had already copied it, and were copying it while comparing it carefully.

President Wang quickly pushed aside the blackboard they were copying and pushed another blackboard next to it over: "Come on, President Gao, if you have any other ideas, let's talk about them on this one."

If Chief Engineer Gao accidentally wiped the blackboard, I wouldn't even have a place to cry.

Unexpectedly, Gao Zhendong laughed: "Haha, it really is true!"

Do you really have an idea? You don't just think about this all day long, do you?

But Mr. Wang would not say such a thing, but asked with great interest: "What is it?"

Gao Zhendong pointed to the combustion chamber and said, "I remember the troops once reported that the combustion of the MiG-19 engine was unstable. Does the MiG-21 have this problem?"

As for which unit it is, that’s not important. It’s still unclear whether it happened or not.

To Mr. Wang, Gao Zhendong's question was like a fairy from the sky. It came out of nowhere, but it hit the nail on the head and was very amazing.

"Boss Gao, you weren't secretly watching the MiG-21 prototype test flight, were you? That's right, the MiG-21's R-11 also has this problem! What do you think? "

This congenital disease of unstable combustion was not cured until the early 80s by our scientific and technological workers. Before that, this problem had always existed.

Mr. Wang’s excitement at this time is naturally self-evident. To be honest, this problem was discovered at the beginning, but there was no way to solve it, absolutely no solution.

We don't even know why the combustion is unstable. We have no idea what the principle of the existing combustion stabilizer is, or we know very little about it, so we can't change it even if we want to.

To be honest, Mr. Wang never considered that he could solve this problem with Gao Zhendong. This thing is far from Mr. Gao's expertise.

But now, Gao Zhendong told him that he had ideas on how to improve this problem. How could Mr. Wang not be excited?

At least others have ideas, but I don’t even have many ideas. If I want to change them, maybe I can, but it seems like I’m just changing for the sake of changing.

"Mr. Gao, to be honest, the V-shaped flame stabilizer currently used on the R11 has some effect, but the stability is actually not good, and the resistance is large. We know that this thing has problems, but there are not many ways to change it. We can only work on the opening angle, number, and position. In fact, the improvement is very limited and cannot solve the fundamental problem."

Mr. Wang laid out his current predicament in full detail. To him, this was indeed a difficult problem.

"Well, I know all this, and the V-type stabilizer is also prone to engine vortex shedding problems." Gao Zhendong said this casually, but it was like thunder in the ears of Mr. Wang and others.

It seems that Mr. Gao's research on this thing is not a matter of one day or two. This thing is invisible and intangible. Not to mention that he himself does not know it, even the experts and comrades who were supported and trained by the Russians are not aware of this.

Thinking of this, Mr. Wang suddenly felt happy. It seemed that Mr. Gao might be able to solve this problem. At least his understanding was much deeper than his.

"Mr. Gao, do you have a solution?"

Gao Zhendong did not comment, but just talked about the source of this idea: "I went on a business trip to the grassland not long ago, passing through a desert, and I discovered a phenomenon while daydreaming on the train..."

Well, you can’t deny it. When people are on a business trip and daydreaming, they can get inspiration.

"Mr. Gao, what's going on?" Mr. Wang was a little anxious, but he knew he shouldn't be anxious.

"Mr. Wang, do you think the sand dunes in the desert will be blown away by the wind?"

"Should it be possible?" Mr. Wang was a little confused. He was not familiar with the desert, but he knew what wind was. It was flowing gas! It was related to the combustion of jet engines. The stability of the flame of the latter was actually to stabilize the continuously flowing gas in a certain form.

Come on, there is a way!
As for whether they would be blown away by the wind, at least he knew that sand dunes would be blown away. If sand was blown up from the back and rolled to the front, they would be blown away.

"No, others can, but I find there is a kind of sand dune that is difficult to be blown by the wind." Gao Zhendong was talking nonsense. Anyway, Mr. Wang didn't know.

Sand dunes, can't be blown...

Doesn't that mean it's stable?

Mr. Wang's heart beat faster and faster. No matter if it was useful or not, at least he saw something. "Mr. Gao, which one?"

"Crescent!" Gao Zhendong announced the answer and drew a crescent-shaped sand dune on the blackboard.

After he drew this, the comrades who had relevant experience also became excited. "Yes, yes, I know, there was such a large sand dune not far from my hometown. When I was a child, I felt that it was indeed not very moving."

"Well, this shape looks stable..."

"Do you think this is bionics?"

"It doesn't count, does it? This thing isn't alive."

"Tao follows nature, understand?"

"But the stability of the sand dunes has nothing to do with the stability of the combustion."

"You know nothing. This means that the wind has a stable flow after passing through the sand dunes, so it will not destroy the structure of the sand dunes."

"..."

Who the hell said that technicians are all well-mannered and nerdy? That's just imagination without real experience, or the definition of technicians is wrong.

Hearing what his own people said, Mr. Wang's face twitched. You wouldn't have remembered it if they didn't mention it, but you all got excited as soon as they mentioned it?

"Don't worry! Listen to what Mr. Gao says!"

Gao Zhendong didn't take it seriously. It would be better for comrades to discuss such things more. However, since President Wang had spoken, he might as well continue his speech, otherwise President Wang's eyes would almost glow.

"It just so happened that I had some knowledge of fluid mechanics. After I came back, I used this phenomenon, combined with my knowledge of fluid mechanics, based on the NS equations, and with the help of computers and simulations, I did some research."

Gao Zhendong is trying desperately to rationalize the source of his achievements. As for whether the computer has the computing power to simulate this matter, Gao Zhendong has the final say these days. It is not impossible for the algorithm to be a little rough and take a little longer.

Mr. Wang then remembered that Mr. Gao in front of him was a real master in fluid mechanics, the kind who could guide comrades working on aircraft to improve aerodynamic shapes.

He is also a computer expert and is proficient in computers.

When you think about it this way, it seems only natural that others would discover this matter?

As Gao Zhendong spoke, he did something that made his comrades at the Institute of Aeronautical Engineering very happy: he rummaged through the drawer!
When you look through drawers, you must be looking for something. What can you find now? Research materials!
This makes them even happier than writing on the blackboard, where there are only a few words but there may be a lot of research materials.

Sure enough, Gao Zhendong took out a printed copy from the "drawer" and handed it to Mr. Wang.

"Boss Wang, here are some of my preliminary simulation results. Take a look. I think the dune vortex stabilizer based on this principle is very promising!"

The dune vortex stabilizer truly solves the problem of unstable combustion in our turbojet engines. It is an original technology from our scientific and technological workers!
This article comes from the original paper of the inventor of this stabilizer, but Gao Zhendong changed the actual experiment into a simulation, the photos into simulated images, and removed some things that were too closely related to the actual experiment, simplified it, and added a few things.

Hats off to the original author, that paper is really brilliant.

President Wang took the document and quickly opened it. Other comrades also came over, wanting to get to the bottom of this matter as soon as possible.

"...tornado...arch bridge...image! That's it!"

"…It won't work if you turn it too fast, and it won't work if you turn it too slow…"

However, after these descriptive and qualitative words, there are quantitative calculations and results. To be honest, most people don’t understand it…

This is the case with the NS equation. Strictly speaking, not everyone fully understands it. When Gao Zhendong traveled through time, the prize money related to the NS equation at the Clay Mathematics Institute was still there and no one had the ability to claim it. However, this did not prevent everyone from using it proficiently.

So when Gao Zhendong came up with this result, he didn't need to consider how the theory was derived. He could explain it all with just three words: luck.

Therefore, it doesn’t matter if they don’t understand it, it doesn’t prevent them from seeing the conclusion.

"…the lean flameout range is much wider than that of the V-groove…the numerical range is 6 times that of the V-groove…"

"...When the incoming air temperature is 70 degrees Celsius, the maximum ignition wind speed is 130m/s, which is much higher than the 79m/s of the V-shaped groove..."

"…The drag coefficient varies with wind speed and is 20% to 25% of that of the V-groove stabilizer…"

Every time people saw a sentence, they exclaimed.

At this time, they fully demonstrated the saying of later generations: "What a pity! I have no education, so I can only say 'fuck' to get around."

Don't say they are uneducated, even if these people are very educated these days, it's the same.

(End of this chapter)