Rule department scholar

He didn't know how to express it for a while.

Zhao Yi said very calmly, "Look at it first, I don't know if it's right or not, there are still some issues that I haven't thought about for the time being, and we need to discuss it together."

"……it is good!"

Sun Lei was really shocked. He couldn't believe that Zhao Yi had just read the design and came up with so many things in one night. When he found the problem, he also thought of the solution. The work efficiency is unimaginable. !

He thought with a wry smile, "I'm so stupid to think that Academician Zhao doesn't understand, and I'm the one who doesn't understand!"

"At Academician Zhao's level, it's very easy to design a plan by himself. Maybe he asked a professional person to come, just as a reference."

"Whoo~~~"

Sun Lei breathed hard to adjust his mentality, and then began to look carefully.

Zhao Yi sat beside him and watched quietly. He suddenly realized that he had a bit high demands on other people. What he made in one night, Sun Lei could finish it in one day.

"Forget it, let's go and see something else first."

He shook his head and said to Sun Lei, "Eat this thing first in the past two days, and read it from beginning to end. Don't worry about the small problems that have been solved, just look at the unresolved ones. , what is the specific idea of ​​the image..."

Zhao Yi walked away after finishing speaking.

Sun Lei agreed and began to look carefully.

……

time flies.

For two consecutive weeks, Zhao Yi was discussing design issues with Sun Lei. Sun Lei's basic level is indeed very good, as long as it is related to the content, he should learn about it.

Just the design of the compressor bleed valve, he can name several types.

Sun Lei's rich professional knowledge has brought great help to Zhao Yi. They discussed the unsolved problems together and quickly solved most of the problems, leaving only two very difficult ones.

One is that the vent pipe is too long.

If the exhaust port of the bleed valve is placed side by side with the turbine nozzle, a narrow and long pipe is required. The biggest impact of too long pipe is to use more materials for the outer layer of the engine.

That would definitely increase the weight of the engine.

This is fatal.

One of the important indicators of aero-engines, the so-called "thrust-to-weight ratio", refers to the ratio of the maximum thrust to the engine weight. Generally, the turbofan engine has a thrust-to-weight ratio exceeding 7, and the Kunlun engine has a thrust-to-weight ratio between 7.5 and 8. The thrust-to-weight ratio of the world's top engines exceeds 10.

If the weight of the engine increases, the maximum thrust must be increased in order to increase the thrust-to-weight ratio, and if the high-pressure air released by the valve is given up, the thrust that can be generated is difficult to make up for the increased weight.

Another problem is the design of the piston.

This is a very complicated problem, but the simple design will definitely cause serious wear and tear on the piston, and problems may occur when using it. In addition, it is also very difficult to know the continuous small piston technology.

In Sun Lei's original design, there was no detailed design of the piston.

This also requires consultation with materials experts.

Zhao Yi immediately called Li Rongmao and Zhang Hongtao. In order to have more ideas, he called all the crew members over to think of solutions together.

Others are not professional, and can only speak out of imagination, but laymen's thinking is not limited, and they may have better ideas.

This time it was Zhou Qing who made the meritorious service.

Zhou Qing didn't understand the principle of pistons, nor did he understand complex material issues. He came up with a wonderful idea, designing the piston as something similar to squeezing a sponge, "If the pressure is too high, the sponge will definitely be propped up. , to a certain extent, the air can rush through."

"Otherwise you won't be able to get out!"

This idea was immediately rejected by material experts.

Zhang Hongtao said very positively, "There is no such material. As long as it can be supported by pressure, it must be breathable. Otherwise, it is equivalent to a balloon, which is not breathable. Once it is breathable, it will burst."

"If there was one, there would be pistons of this type on the market."

Zhou Qing muttered in a low voice, "I'm just talking about my thoughts, Academician Zhao said to express opinions casually..."

Zhao Yi did not deny it directly, but frowned. He felt that Zhou Qing's idea was very novel, and he did not support it in terms of materials, but it could be designed more complicated, such as making the piston part porous and adding rubber inside. , Resin-like materials, when the pressure is too high, the rubber is extruded, and the resin moves in the hole, exposing the passage leading to the air outlet.

When the pressure is insufficient, the rubber and resin will return to their original positions under the pressure of the other side.

This design can connect parts of different stages of the compressor with small holes, but the middle must be blocked and blocked by rubber and resin materials, because the pressure on both sides is different. When the difference is too large, the rubber and resin The class material will change position.

For example, if the left side is 10Kpa (pa, pressure unit), and the right side is 20Kpa, the difference is 10Kpa.

The material in the middle of the hole changes position and exposes a channel to the vent on one side.

The left side is 2Kpa, the right side is 7Kpa, the difference is only 5Kpa, and the material in the middle will also change its position, but it is not enough to expose the passage to the exhaust vent.

With this type of small hole design, one is definitely not enough, and maybe a dozen are needed to release the high-pressure gas.

Of course it still depends on the width of the hole.

Zhao Yi thought for a long time, then suddenly said, "I think Zhou Qing's idea is fine, we can design it like this..."

He simply stated his thoughts.

Everyone listened carefully, and the more they listened, the more surprised they became. Sun Lei opened his mouth wide in shock, and couldn't help shouting, "Academician Zhao, you are such a genius!"

Others followed suit, "This design is absolutely amazing!"

"Are you referring to Zhou Qing's thoughts? Why do I feel completely different? Is there any relationship between the two?"

"This piston design is really high-tech, and it happens to be used in a compressor..."

"Academician Zhao is indeed Academician Zhao!"

"Let the rest of the engine group hear your thoughts, I reckon they'll blow their eyes!"

"..."

Amid a lot of flattering voices, Zhao Yi smiled calmly.

In fact, sometimes, he also really wants to keep a low profile, and if he acts too talented, he will break away from the masses.

But, no way!

What can you do if you are born smart?

Chapter 445 The main design is over, and the review team arrives

After Zhao Yi expressed his design ideas, the R&D team conducted demonstrations on both materials and design.

Sun Lei and Zhao Yi are still responsible for the design, and Zhou Qing is the other person involved. Zhou Qing explained what is important to participate. He just expressed an idea. Zhao Yi made a feasible plan for the expansion of the idea. I don't understand any structural or design issues, and spend most of my time serving tea and pouring water.

However, Zhao Yi still asked Zhou Qing to participate. After all, it was Zhou Qing's idea.

In terms of research and development, ideas or creativity are the most important. Without ideas, there is nothing. Zhou Qing only provided ideas, but with his ideas, there is a design.

This is R&D contribution.

Li Rongmao and Zhang Hongtao are in charge of materials. They need to study together what materials meet the requirements, and list the performance, parameter indicators, etc. of the materials that meet the requirements in detail. They not only want to list one type, but many kinds , make an analysis report of advantages and disadvantages.

For the next three days, the R&D team will be doing this work.

Three days is enough for the design to finalize.

In the end, they came up with a design and materials that met the requirements, and finalized the design of the deflation valve.

Then, in Sun Lei's design plan, there is only one last problem left to be solved--

Plumbing problem!

The compressor is located in the middle of the turbofan engine, and the combustion chamber and the turbine group are separated from the jet port. The pipeline should be arranged in parallel with the jet port, which is equivalent to spanning half the length of the engine.

This distance is simply too long.

Because the inner skin of the engine needs to withstand high temperature and pressure, at least it is made of titanium alloy. Adding a few more internal pipes will add a lot of weight, and the power provided by the abandonment of the piston is very limited. Even when it is running, it can reach 5.00% of the main jet port, which is already the theoretical highest value.

This power is actually not low, because when the fighter slows down, the fuel supply will definitely be greatly reduced. With the auxiliary power provided by the bleed valve, the fuel supply can be further reduced.

But it is equivalent to the added weight to the engine, and the design of the pipeline for the parallel jet port is definitely not worth the candle.

In the final analysis, it is still a design problem, but the pipe is not like a bleed valve, and a very delicate design can be used to make up for other problems. to what effect.

Of course, there are still plans.

Yuan Haitao shared an idea. He thinks that the air outlet can be directly placed in the secondary air duct. The turbofan engine does not only have one air duct. The internal main air duct is the source of power for the engine, and various internal components are the main air duct. For service, the secondary air duct is on the outer layer of the main air duct. The purpose of the design is mainly because the fan in the front occupies too much area, while the compressor in the center occupies too small area.

When the fighter plane flies at a high speed, all the high-speed air cannot pass through the main air duct, and the engine itself becomes a huge resistance, so the secondary air duct and the outermost third-level air duct were designed.

When the wind force rises to a certain level, the air outlet of the secondary air duct will be opened, and the air can pass through directly from the secondary air duct. Similarly, when the wind force is higher, the outermost third air duct will also be opened.

If the air outlet of the deflation valve is directly placed inside the secondary air duct, the high-pressure air can be directly discharged to the secondary air duct, and then discharged to the air outlet along the air duct.

This idea was directly rejected by Zhao Yi and Sun Lei, because the high-pressure air is discharged to the secondary air duct, which cannot increase the driving force. What is the point of the previous design?

Therefore, the exhaust port of the bleed valve can only be placed inside the primary channel. It is better to discharge high-pressure air to play other functions, such as entering the combustion chamber to promote fuel combustion.

"Exhaust into the combustion chamber is impossible."

Sun Lei shook his head directly, "The temperature in the combustion chamber is too high, and the high temperature will impact back into the pipe along the exhaust port, which will easily cause damage."

Zhao Yi nodded and said, "Don't worry about the combustion chamber, we still need to add the exhaust vent to the edge of the jet port."

"That's fine."

He thought about it carefully, and said, "Redesign the outer layer of the main air duct and the outer layer of the secondary air duct, and try to shorten the distance between the edge of the combustion chamber and the air injection port to reduce the possible increase in weight."

"Let's just try~"

Zhao Yi finalized the research and development direction, and the others didn't have any opinions, because they were all laymen in the design of the engine skin, and none of them had done similar design work.

So everything depends on Zhao Yi himself, but for him, the difficulty of this design is not good. Others need to consider various factors when designing, but with enough conditions, he can easily get the ideal design structure. After a day and a half, he came up with a design plan.

In this solution, the outer layer of the compressor is designed to be arc-shaped. Because the combustion chambers on both sides are small, the compressor forms a semi-wrapped structure for the combustion chamber. The exhaust pipe of the deflation valve can directly cross the combustion chamber and pass through. The outer layer of the turbine group is too thick, reaching the edge of the jet port.

Although it is still running in a straight line, the length of the pipe is greatly reduced, only a quarter of the original, and it can be designed in the inner bag-skin without an additional layer of material.

Of course.

Because pipes are added to the inner layer, the relevant parts must be thickened, and the total weight will still increase.

"Only one-tenth of what was originally expected, and the power and stability it can provide, the weight gain is also acceptable."

Sun Lei came to a conclusion after doing calculations.

Zhao Yi was very indifferent. He already knew the result after he made the design, and the calculation was not difficult for him. He just showed the design to others, and asked them to give their opinions in a symbolic way, so that everyone could add a little bit. Participation.

The best result is an unanimous pass.

It doesn't matter if someone makes an opinion, just give a brief explanation and ignore it selectively.

here.

In Sun Lei's design, all the problems have been corrected.

This set of designs was completely finalized, and there was an internal celebration in the R&D team. Everyone came to congratulate Sun Lei on his success. The adoption of a set of designs also represented success. Zhou Qing also got a little 'credit'. You should be envied, because he really just expressed his ideas. Sun Lei did the design and followed the whole process of research and development. After coming to the second group of Kunlun, he worked more than [-] hours a day, and he put in a lot of effort.

Zhao Yi is celebrating that everyone will continue to work hard, "We will try to solve all the problems in one go, and design a brand-new, top-notch fan engine!"

"This project has dragged on for too long."

He said seriously, "I really want to finish it in one go. There is not much work left, so work hard and work hard..."

Zhao Yi's encouragement to everyone came from the heart, but most of the others didn't understand.

"The project is taking too long?"

"how long?"

Sun Lei asked suspiciously, "As far as I know, the second group of Kunlun has just been formed?"

Zhou Qing said, "You came late, the time Academician Zhao said should be calculated from the time we shipped the prototype."

"How long has it been?"

"It's almost half a year. We came here in March next year, and now it's September!" Zhou Qing answered seriously.

"Half a year? How long?"

Sun Lei listened blankly and didn't know what to say.

The Wangwu engine unit was produced from the Kunlun engine components. When it came out, it brought a large number of people and technology. What they did was to correct and improve the original foundation. As a result, it took more than eight years to finalize the design. The follow-up A prototype has been produced, but it is still far away from being able to assemble fighter jets. It feels at least two or three years away.

Yanhua University has only been working on the Kunlun prototype for half a year, and has already completed the research and development of the core turbine blade material, and demonstrated the design of the compressor bleed valve. The results can be said to be very impressive.

But, to finish the design?

"There is still a lot of work to do in the follow-up. According to this progress, it will be the fastest, the fastest, and it will take another year, right?"

Sun Lei calculated it based on Zhao Yi's work efficiency. It would be acceptable to replace it with the Wangwu engine set, let alone a year, if it takes three to five years to finalize the design.