Rule department scholar

It is true that the Kunlun engine has not been delivered for a long time, and a lot of problems have not been resolved. It cannot meet the needs of the third-generation aeroengine at all. The turbine blade material is only in the process of demonstration, and it will not be used in a short time. First of all, they still have to solve the existing problems of the Kunlun engine, otherwise they will not be able to pass the technical demonstration, let alone the finalization of the design. .

There were still people who supported Zhang Gangchuan in the meeting, but the number of people who supported it was still relatively small, and they were all related to the Kunlun engine unit. Outsiders had no confidence in the Kunlun engine unit, but looked forward to Zhao Yi.

So there was no need to continue to report, Liu Jiankun made a decision on the spot and agreed to Zhao Yi's application to form a 'second group'.

There is still a lot of work ahead.

For example, in terms of funding, the operation of a new engine research and development team will definitely involve a huge amount of funding.

The mobilization of such a large amount of funds is not in the hands of Liu Jiankun alone, and all aspects of work must be done.

What's more, support for new engine units, talent support, problems with docking factories, and major research and development sites are all problems.

It still depends on Zhao Yi's thoughts.

When Liu Jiankun and Zhao Yi made a video call and wanted to listen to his thoughts in detail, Liu Jiankun suddenly realized that he was thinking too much, and Zhao Yi didn't even make a plan, "New venue? No need? I'm mainly in Yanhua Here at the university."

"If you can help find a large venue, it will be fine for temporary equipment debugging and placement of equipment..."

"But it must be in the capital, otherwise it will be too far away."

"Docking is the most important thing."

"The reason why I applied for independent funding and an independent R&D team is to skip the Kunlun engine unit and directly connect to the factory, so that our design can be manufactured in the first place!"

Liu Jiankun was stunned after hearing this.

Don't need to build a large R&D base?Just need a place to debug equipment?

Zhao Yi didn't even mention follow-up funds, he just said, "If the funds are not enough, we will report. In the initial stage, we will only do design, as long as the docking factory can make good things." The request is really too simple.

"Maybe it's because Academician Zhao has no experience!" Liu Jiankun suddenly looked down on Zhao Yi. He remembered Zhao Yi's age, it is impossible to have experience, and rashly applying for such a major project will definitely encounter various problems in the future. problem?

"We can only wait until we encounter problems in the future. But no matter how bad it is, it must be better than the Kunlun team!"

Liu Jiankun thought.

In fact, Zhao Yi didn't realize the importance of the R&D base at all, or he didn't need a large R&D base.

A large-scale R&D base is to put all relevant R&D groups together, and each R&D group works independently and coordinates to a certain extent. The main job of the project leader is not to do R&D, but to coordinate the work of each R&D group, so that all R&D groups And the developed components are unified to create the final product, which is the aero engine.

But Zhao Yi doesn't need 'coordination' at all.

Even if there are a lot of research and development teams under his command and come up with various results, he can use the "Law of Supervision" to easily integrate all the results together to form a perfect whole.

In addition, Zhao Yi feels a bit like Kong Ming.

Do everything yourself!

He intends to inquire about every important technology and design of the engine, and then make suitable improvements to unify them, which is the final design of the engine.

As long as you have a perfect design, let the factory manufacture the products in the design and combine them together.

This step is the end.

For example, it took several years to debug the Kunlun engine, and there were still minor problems. It was impossible for him to find out the problems and solve them in the first place.

During this process, what Zhao Yi is most worried about is the factory manufacturing problem, and the domestic high-end manufacturing is still not good enough.

If there is a design, but there is no corresponding manufacturing technology, the components in the design cannot be manufactured, at least there will be a certain gap in performance, and other components must be adjusted to a certain extent.

This step is the most time consuming.

However, no matter what, the research and development team he leads will not have any problems in technology research and development.

……

There are funds.

The application for a new R&D group was approved.

Next, Zhao Yi began to expand the R&D team, and found people to join his R&D team. Zhang Hongtao and Li Rongmao were the first to be invited in, "You are in charge of the material team."

Zhang Hongtao was better. He already knew that Zhao Yi was researching the engine, but he was surprised that Zhao Yi led the research and development team "independently", which meant that he left out the Kunlun engine group.

"Isn't Zhang Gangchuan in a good mood?" Zhang Hongtao thought of his family, with a gloating expression on his face.

Li Rongmao was a little confused.

Kunlun engine group two?What material group do I add to?Responsible for material issues related to aero-engines?

"This is a bit courageous!" Li Rongmao suddenly felt the pressure. It's not that he has never done large-scale material projects, but the material team of the engine group is only two people, he and Zhang Hongtao, and there is not even a team leader. He is in charge of half of the project. department?

Next Zhao Yi invited Yuan Haitao's team.

Zhou Qing and Xue Fengge were invited to join in. They are still technicians and do not participate in the design and development, but they are responsible for dealing with the docking team sent by the aviation group, and go directly to the relevant factories to supervise the manufacturing process of the new parts of the research and development design. And to test new components in the future.

In fact, when they heard that Zhao Yi formed a new research and development team and invited them to join together, Zhou Qing and Xue Fengge felt that they should show their determination and explain their "loyalty" to the Kunlun engine group and Zhang Gangchuan. After being in charge of connecting the factory and managing the workers, the two immediately forgot about "loyalty" and decided to work together with Zhao Yi.

"Only with Academician Zhao can we have a future!"

"I think our second group can develop high-end engines the fastest. The original Kunlun group is too bad!"

"The higher authorities have directly approved it, why? Everyone knows the gap between Zhang Gangchuan and Academician Zhao!"

"..."

In fact, the reason for Zhou Qing and Xue Fengge's change of attitude is very simple. The scope of work they are responsible for is a bit large, and the same level is also promoted, and the salary is naturally greatly improved.

As an ordinary technician in the Kunlun engine group, he was only a technician in charge of a prototype, and in the second Kunlun engine group, he was responsible for connecting with the factory and supervising the manufacturing process of components. His subordinates also managed the team of workers. The work was not a concept at all. Or let them break away from the group of ordinary technicians and directly promote them to the important management level.

Yuan Haitao was assigned a very free job. He was in charge of the large and small affairs of the R&D team. He was half the person in charge of the R&D team, and he could also be said to be a well-intentioned assistant.

He is the leader of the prototype unit. He knows a little about the performance and parameters of each component, and he can say something when it is mentioned. It is still a great help to Zhao Yi.

In addition, it is the power group.

There is only Wang Zhiguo in the power group, so Zhao Yi asked Wang Zhiguo to take charge.

Wang Zhiguo was even more ignorant than Li Rongmao. He came to the capital just because he was arranged for a business trip. He wanted to meet Zhao Yi. It was a worthwhile trip, but he was assigned to be in charge of the power group?

"I'm in charge of a power pack?"

"Although I'm the only one, but... at least there are turbine blades above 1700 degrees Celsius, the combustion chamber still needs to be re-certified..." Wang Zhiguo felt the huge pressure, and he worked overtime to do the power demonstration of the combustion chamber. .

It is definitely not enough for the R&D team to have only this person.

Zhao Yi also knows that there is a shortage of people in many aspects. He does not need to have such a huge design team like the Kunlun engine group, but at least every technology and every component has people in related fields, not a technical expert. No one understands when it comes out.

So recruiting is a must.

The research and development of turbofan engines is a major project, and it is certainly not possible to recruit people casually.

Zhao Yi simply left the job of recruiting to Yuan Haitao, and asked him to recruit reliable and technically capable talents, and then immediately researched new components--

High pressure compressor!

The three core components of the turbofan engine, the combustion chamber, the high-pressure turbine and the high-pressure compressor, can be integrated into the next stage as long as the technical difficulties of the high-pressure compressor are overcome.

Chapter 442 Let me go!

The three core components of a turbofan engine are the combustion chamber, the high-pressure turbine, and the high-pressure compressor. They are combined to provide propulsion for the engine.

Among them, combustion is the most basic power source, and the high-pressure turbine is the part that drives the entire engine to run under the driving force of the combustion chamber.

The high-pressure compressor has the most effects. It operates under the drive of the high-pressure turbine to provide a source of high-pressure air for the combustion chamber. At the same time, it also provides high-pressure air for the pressurization of the aircraft cabin, cooling of high-temperature components such as turbine blades, and the intake duct. Anti-icing, de-icing use and more.

In addition, on the rotor shaft of the high-pressure compressor, a certain amount of power must be output through gears to drive various accessories of the engine, such as lubricating oil pumps, fuel pumps, starters, generators and hydraulic pumps on aircraft, etc.

The high-pressure compressor is at the center of the turbofan engine and is also one of the core components.

In addition to various incidental functions, the core technology of the high-pressure compressor still depends on the boost ratio and stability it can provide.

The high-pressure compressor needs to provide high-pressure air, and it becomes an unstable component in the turbofan engine, and its stability determines the stability of the turbofan engine.

The stability of any mechanical device is the most important. To a certain extent, the stability represents safety. During the flight of the fighter, any condition of the engine will be very fatal.

At present, there are many problems in the prototype of the Kunlun engine group, most of which are caused by the instability of the compressor. Among the instability problems of the compressor, the biggest problem is "surge".

Surge is a state.

The airflow of the compressor comes from the flight of the fighter plane. When the fighter plane is flying, the speed and altitude of the flight determine the amount of airflow entering the compressor, which causes the instability of the "airflow input end".

The flight state and engine speed are constantly changing, and the compressor must also withstand constant changes. The faster the airflow enters, the bigger it is, that is, the faster the speed of the fighter, the faster it is. The problem encountered when decelerating is even greater. The reduction of the compressor leads to a reduction in the speed of the compressor, and the internal boost ratio decreases accordingly. The pressure reduction in the first few stages is not significant, and the pressure reduction in the latter stages is relatively large.

This is where the problem arises.

As the pressure decreases, the volume of the gas becomes larger, and the airflow passages of the stages behind the compressor appear to be "too small", the flow is not smooth, the airflow is blocked and cannot be completely discharged, and the blades do not work normally.

As a result, the gas pressure fluctuates in a pulsating fashion.

When the airflow entering the first few stages of the compressor flows backward, if the back passage is blocked and cannot flow through completely, the airflow will flow backwards forward, and the backflow will unblock the airflow passage behind, and the airflow will be sucked into the compressor again and flow to the compressor. When it flows backward, it is blocked again, and it flows backwards again...

With such repeated changes, the air flow moves back and forth in the compressor, and flows out from the outlet at varying pressure and speed.

This is the "surge" problem of the engine.

When "surge" occurs, it will be accompanied by a sudden rise in the gas temperature in front of the turbine and a loud sound. The damage to the internal blades is still a small problem, and if it is serious, it will cause the engine to stall directly.

When Zhao Yi set out to solve the problem of the compressor, the first thing he had to study was the "surge" problem. Compared with the performance of the compressor, the stability was much more important.

This is like running an algorithm. No matter how efficient the algorithm is, it is full of bugs, and it is meaningless if it cannot run at all. Only by solving the bug problem can the performance be further improved.

"The compressor on the Kunlun has two designs to deal with 'surge', one is the deflation valve, and the other is the adjustable stator vane."

"There should be no problem with the bleed valve, but I think the problem is mainly in the design of the adjustable stator vanes." Yuan Haitao took the design drawing of the high-pressure compressor and expressed his thoughts.

This is also the thinking of most people in the Kunlun engine group.

The bleed valve, in simple terms, is to bleed air. If the pressure inside the compressor is not balanced, a part of high-pressure gas will be released, and the pressure inside will naturally be relieved a lot.

The design of the stator blades is much more complicated. The compressor has two sets of blades, one is the booster blades connected to the turbine shaft, and the other is the stationary stator blades. Each stage inside the compressor is made of It consists of a booster vane and a stator vane.

The booster vanes are responsible for compressing the air, and the stator vanes are responsible for deceleration.

When the high-pressure gas is decelerated, the pressure continues to increase, so that step by step, a large amount of gas is accumulated in a small space, and the pressure becomes very high.

If in the process of supercharging, the stator vane rotates in a small range with the change of pressure, it will continuously change the wind blocking capacity, and also stabilize the internal pressure change, so that the occurrence of "surge" can be controlled and reduced possibility.

In fact, to understand it simply, it is like something falling from the sky, the purpose is to create an impact, but it may be damaged if it falls directly on the ground, and the possibility of damage will be reduced accordingly if it falls on the spring.

So the disadvantages are also obvious.

The movable stator blades have a negative effect on the performance of the compressor, that is, the boost ratio is reduced, and the same is true for the bleed valve, and the discharge of high-pressure gas will also reduce the boost ratio.

Of course.

In order to pursue stability and reduce performance, it is also a last resort. Even the world's top turbofan engines will have similar designs to make the engine run more stably.

After listening to Yuan Haitao's explanation, Zhao Yi frowned and thought carefully before asking, "Is there any other way?"

"Besides, I don't know."

Yuan Haitao spread his hands helplessly, expressing that he is not a professional.

Zhao Yi pursed his lips vigorously, and asked, "It seems that our R&D team doesn't have talents in this field?"

Yuan Haitao smiled wryly, and the meaning of his expression was obviously, 'Is there anything you don't know? '

There are less than ten people in the research and development team. Counting the technicians, workers and the team sent by the aviation group, there are only a dozen or so people. Among them, there are still only a few people who are professional in research and development.

Zhao Yi frowned and asked, "Do you know where there are talents in this field?"

"Turbo group!"

Yuan Haitao said, "The people who are really available in this area are almost all in the two engine groups. I don't know if there are any in the Academy of Sciences or other institutions, but it is best to find them in the engine group for professional research on aviation high-pressure compressors." He meant that I don't know if other institutions have relevant talents, but it involves major national projects, and it is hard to find irrelevant people.

This is the biggest problem encountered by the R&D team.

It is difficult for Zhao Yi to recruit a few people from the outside world, because it is a major national project, it is best to find "internal talents", and "internal talents who have long-term research and development of high-pressure compressors" are almost all related to Kunlun and Wangwu engine groups associated.

and so……

"Poaching?"

Zhao Yi thought about it carefully, and still felt that poaching was not a good idea. After all, they were all engaged in the research and development of aero-engines, and they all belonged to the aviation group.

"Help me contact the person in charge of Wangwu Engine!" Zhao Yi simply asked the other party if he could send someone over.

The person in charge of Wangwu Engine is Zhang Shuqing, a 50-year-old middle-aged man who came from a scientific research unit under the Academy of Sciences and joined the Kunlun Engine Group. Later, Wangwu Engine project was established, and he was in charge of the research and development of Wangwu Engine.

Compared with the Kunlun engine, the Wangwu engine has high hopes, because the design of the Wangwu engine is finalized very quickly, and there is no major problem in manufacturing the first prototype, and other prototypes are ready to be manufactured.

When a project has progressed to this point, it is usually time to do the finishing touches.

However, Zhang Shuqing is not satisfied with completing the project, but hopes to improve the engine, continue to increase the performance of the engine without increasing fuel consumption, so that the engine can be assembled on more types of fighters.

This goal is also normal.