Rule department scholar

Yuan Haitao, Sun Lei, Wang Zhiguo and others were all sitting on the side, and their concerns were different.

Sun Lei looked around and asked, "Academician Zhao designed this, right? When did we calculate and demonstrate this?"

Wang Zhiguo grinned, "I don't know at all, we have all completed the improvement of turbine blades and supercharger blades..."

Yuan Haitao said, "This is all done by Academician Zhao. Of course you don't know, and he can't use others. Academician Zhao is the top mathematician. Do you need to ask others about this?"

"Right."

"However, blade design is not just mathematics..."

When several people were discussing, Zhao Yi talked about the latest design, which is the solution for the stability of the compressor. He opened the design document, feeling a little dry, and immediately looked to this side, and said, "Sun Lei, you are in charge of this piece of content, so please explain it.”

"I?"

Sun Lei pointed at himself a little surprised.

"Of course, you are in charge of this part." Zhao Yi said seriously, "Just talk about the deflation valve."

"it is good."

Sun Lei stood up and looked around, but still seemed a little nervous. He walked to Zhao Yi, took the document and began to explain, "We made a new design of the deflation valve for stability, which completely changed the original simple one. Instead of a piston design, it uses a multi-channel pressure release method.”

"The inner port of the engine body corresponds to the stages of the compressor, and the outer port of each port corresponds to the final exhaust port..."

"We designed the final exhaust port on the periphery of the jet port, and at the same time changed the outer shape of the compressor..."

Sun Lei was a little nervous at the beginning, and said something wrong twice. Later, he seemed to have found the state, and he continued to talk for more than ten minutes, from the design of the tunnel piston to the design of the outer layer of the compressor. Including the second air duct is equivalent to changing the shape of the inner and outer layers of the engine.

This design is very novel, and the core lies in the outer shape of the tunnel piston and the compressor wrapping the combustion chamber. Sun Lei simply drew it, which made several people in the meeting room shine, including Zhang Gangchuan, who exclaimed, "Ingenious! "

"This design is not easy to think of!"

"Is it Academician Zhao?"

After Sun Lei finished introducing, Zhang Gangchuan couldn't help but ask, Zhao Yi shook his head and said, "It was Zhou Qing who first proposed it."

"Who is Zhou Qing?"

"I do not know?"

Not to mention other people, even Zhang Gangchuan didn’t know Zhou Qing. Zhou Qing was just a small engineer who maintained the prototype. He could be said to be a technical blue-collar in the R&D team. It was not easy to be remembered.

Zhou Qing was a little excited when his name was mentioned, he raised his hand high, "I! I!"

Everyone else looked over.

At this moment, Zhou Qing had reached the pinnacle of his life. All the leaders in the conference room and the elite R&D personnel were all looking at him. He even cleared his throat, thinking about what to say.

Liu Jiankun asked with interest, "This design is very innovative, is there anything else?"

Everyone's attention immediately shifted to the next technical issue.

Zhou Qing held back the words.

In fact, the new design and improvement are almost here, which is enough to surprise everyone. Even Zhang Gangchuan can’t say anything. I feel that with these and the performance of K03B, it is definitely enough to apply for design finalization. The design can be said to be similar to the Kunlun engine. There is already a very big difference. What is not sure is whether the design and improvement are correct. After the design acceptance stage, it must go through detailed demonstrations.

But what the review team didn’t expect was that the report of the second group of Kunlun only mentioned the main changes, and there were some incidental changes that have not been finished. The machine channel piston and the new blade materials were explained, and then he himself talked about the changes of the blades and fan parts in the front part of the main shaft.

The fan blade and the fan part in the front section of the main shaft are integrated, but it is not within the scope of "design acceptance". There is no target aircraft model, that is, to determine the engine demand. The front blade and fan are very uncertain. For turbofan engines, it is different. The front blades and fan drive the same main core components, which can be used for two purposes.

For example, the design of the front fan blades and fans is very large, which will generate a lot of resistance, greatly reduce the thrust-to-weight ratio of the engine, and at the same time greatly reduce fuel consumption, which can be used in civil aviation airliners.

on the contrary.

The requirement of a fighter jet for a turbofan engine is that the smaller the front blades and fans, the better. The smaller the resistance, the smaller the resistance. It is best not to use the second and third air ducts, which can generate huge thrust. Support fighter jets to fly at supersonic speed or even several times the speed of sound.

The difference is here.

Zhao Yi still made changes to the front fan blades and the fan. He mainly adjusted the shape and deflection angle of the fan blades. A thinner fan was added behind the big fan, and the front fan blades at the back were correspondingly less. Two pieces, "This matching design can generate greater forward pulling force without adding weight, because the front fan blade requires less material. I discussed with the material team, and it is possible to switch to some new materials. reduce weight."

Performance gains are key.

No matter what aircraft the engine is used in, any design that can directly improve performance can definitely be used.

Zhao Yi's fan improvement problem did not cause much reaction, because the review team was already surprised enough.

"ended?"

"there is none left?"

Liu Zecheng reacted a little stiffly. He was probably the most uncomfortable one in the conference room, because he was the only one who knew very little about aero engines. Some parts sounded like a bible, but he also knew that the design of the second group brought everyone the shock.

he's clear--

Zhao Yi led the second team to make huge changes to the Kunlun engine, even completely from the inside to the outside, including the core turbine group, combustion chamber, compressor, as well as the two-layer engine skin and the front fan. Wait, it's not easy to find a place on the engine that hasn't been changed.

Therefore, there is no need to worry about the problem of few design changes. On the contrary, there are more designs and it will be more troublesome to manufacture prototypes.

Liu Zecheng still knew about this.

If you want to make fewer changes and have experience in manufacturing Kunlun engines, some parts can be used directly. They are all brand-new designs, and it is many times more difficult to manufacture them.

"No wonder Academician Zhao first asked Seiko Technology, so that's how it is!" Liu Zecheng completely understood.

At this time, Zhang Gangchuan was the most embarrassed.

When listening to the design introduction of Kunlun Group [-], he still listened with interest and praised some designs, but now he realized a problem, Kunlun Group [-] took only a short time, not even three In just one month, all the design work was completed, and the process of applying for the prototype was directly entered. Isn't the progress almost catching up with the Kunlun group?

In addition, the design of the second group is also very high-end.

If their designs are passed in the subsequent design acceptance, then a corresponding prototype will be manufactured...

"Is there any need for our group to exist?"

Zhang Gangchuan suddenly became a little confused. He had a crisis of 'losing his job' in his heart, and he couldn't help thinking, "How about...merging with the second group of Kunlun and developing the design of the second group together?"

"no!"

He shook his head immediately.

The Kunlun engine group has persisted for so many years, and finally got a prototype, and the progress in fighting against failures is also very gratifying. It is really unacceptable to give up directly.

"Perhaps the prototype of the second group has more faults than the Kunlun!" Thinking of this, he calmed down.

Chapter 448 Postgraduate entrance examination, let's fight together!

No matter what kind of design, failures are inevitable in the first prototype. No matter how good the design is, it is only a theory. There are many factors that affect the theory from theory to practice.

For a turbofan engine, the performance collocation of each component, the control system, and the stability of the engine, etc., each will encounter problems, and it is inevitable, because the factors that affect the occurrence of failures are not only design problems , The gap between manufacturing technology and manufactured products and design is even bigger than the problem of design itself.

After the prototype is produced, it enters the next step, which is the process of continuously repairing the fault.

It's like software programming.

The first is to write a lot of code, and there will be a lot of bugs when debugging and running. Many bugs need to be fixed before it can be officially run. The operation may not necessarily get the desired results, and it needs to be repaired and repaired continuously. Putting it on the market also requires constant updates to fix problems.

Now the Kunlun engine has just passed the stage of operation, and a large number of problems have occurred during the operation. The Kunlun engine group is constantly repairing the problems, and every problem is very complicated to solve.

The second group of Kunlun has just entered the stage of acceptance design, and the follow-up prototype will definitely have to repair the fault.

"Faults, definitely not less!"

Zhang Gangchuan thought.

He didn't feel gloating, but made judgments based on facts, but the judgment of "many faults" really calmed him down a lot. To put it bluntly, the establishment of the second Kunlun group made the Kunlun engine group very embarrassing , especially the second group of Kunlun also made achievements.

Several new technologies and new designs mentioned by Zhao Yi are impressive. The overall design of the Kunlun engine has also undergone many changes. It can be said that from the inside to the outside, everything has been changed except for the main shaft. The design of the outer layer of the machine, even the shape has changed.

Where does the prototype manufactured in this way still have the shadow of the Kunlun engine?

That is a completely new turbofan engine.

The most important thing is that the research and development time of the second group of Kunlun is very short, and the front and back together are not enough for a fraction of the Kunlun engine. The design made with such high efficiency, if there is no big problem with the prototype, the Kunlun engine group has been working for several years. It really became a joke, they could even disband early.

This is where Zhang Gangchuan is depressed.

Although the Kunlun engine was not designed by him alone, he was only the person in charge for a few years later, but he participated in the design of the Kunlun engine throughout the whole process. He is known when talking about the Kunlun engine in China, and the work he led the team has become a joke. It also makes people feel very depressed.

In addition, several years, more than ten years, and more than 20 years of hard work have been completely surpassed by other groups in a few months...

Just thinking about it, Zhang Gangchuan has an urge to retire early!

What are you doing?

The back wave of the Yangtze River pushes the front wave, and the front wave should retire!

……

The conference room report is over.

Zhao Yi and other members of the Kunlun second team only briefly introduced the new design and revision, but it was enough for the review team to know that the second team had a lot of designs and made a lot of corrections inside and outside the Kunlun engine. The design is different from the Kunlun engine, it is a completely new design.

This is enough.

It is also impossible for the review team to truly become an acceptance team. They don't have so many elite experts, and they can't decide which fighters the second team will target. They have to go back and do a good job of research.

First, the design problem still needs to be identified.

Although Zhao Yi and other people in the second group explained the new design and revision, they only briefly talked about it, which is almost equivalent to directly stating the conclusion, and the acceptance of the design must be understood, and the design can only be completed after confirming that the design is correct. The acceptance check is the demonstration of manufacturing the prototype, because the prototype is not decided to be manufactured casually, and the most important thing to consider is the cost issue.

Prototypes are all piled up with money.

The first prototype of the Kunlun engine had a minimum manufacturing cost of more than [-] million yuan. The most important cost was at the manufacturing end, because it was a brand new design, and the parts were not mass-produced. The manufacturing end had to prepare new molds, and some demand For high-tech components, it is necessary to discuss how to know the specifics. Naturally, the cost is very high and the time consumption is long.

Later, the second and third year will be manufactured, and the relative cost will be slightly lower, around [-] million RMB. Unless mass production is confirmed, the manufacturing cost will always be high.

The design and manufacture cost of Kunlun Group 03 is higher. First of all, it is a huge cost of materials. K[-]B contains more than [-]% rhenium, and the corresponding turbine blades are also expensive, because it involves higher temperature and pressure. Better materials are needed, and the engine is more than three times more expensive than the Kunlun engine in terms of materials.

In addition, the design of the second group requires higher technology, and some parts are more complex in design, more difficult to produce, and more expensive to consume.

After the second group briefly introduced the design, many people who knew it had estimated in their minds that the cost of the first one might reach more than [-] million people to manufacture a prototype with the second group's design.

This is just the first one.

If you consider the follow-up debugging issues, you will definitely manufacture the second and third units, and if everything goes well, at least more than one billion will be burned.

This is still a conservative estimate.

Therefore, the steps of strict acceptance of the design are indispensable. The Aviation Group and the Science and Technology Department must confirm that the design is correct, and then they must conduct a large number of evaluations.

For example, demonstrate the overall weight of the engine.

performance.

Manufacturing technology needs.

and many more.

These are not just the design of the second group, but also the technology of the cooperative factory, and the cooperation of the aviation material department, because the materials of many engines may not meet the standards, and the detailed materials of each component are not discussed in the design of the second group. not much.

After a definite feasibility analysis report is issued, the aviation group can determine the allocation of funds to manufacture the prototype.

So the aviation group will be busy next. They will find a lot of experts and technicians to conduct detailed demonstration and research on the design of each part of the second group.

The second group also needs to send people over.

Liu Jiankun and Zhao Yi explained the situation. Zhao Yi thought for a while and let Sun Lei, Wang Zhiguo, Yuan Haitao, Li Rongmao and others pass by. They knew about some design and technical issues.

Some design principles are only clear to Zhao Yi, but he doesn't have the heart to go to the aviation group base to explain to a bunch of acceptance personnel.

If he had the cheek to ask, he would definitely answer.

"So be it!"

Zhao Yi decided.

The reason why he made this decision was that the acceptance of the design by the Aviation Group and the Science and Technology Department would take a long time. In addition to discussing the targeting of fighters and coordinating with other departments, there must be a series of internal processes. Discussions will take a long time, and he doesn't want to waste too much time.

After the review team left, because the design acceptance would take time, and other people in the second group were also planning to "go on a business trip", Zhao Yi was free. He didn't need to stay in the laboratory any longer, he just returned to the campus life and enjoyed it easily. last few days.

Senior year!

Although Zhao Yi feels that nothing has changed, in fact, it is completely different.

Among the few people in the dormitory, Meng Zheng never saw his head and tail, and he didn't know what he was busy with, but he spent most of his time in the study room or library, so it was reasonable for him to get good grades.

Fan Lei was busier than Meng Zheng.

Yan Xuelin, director of the Biomedical Research Institute, thinks highly of him and promises to formally sign a work contract when he graduates.

For example, the question of the Center for Medical Sciences.

The construction of the Medical Science Center has been started for almost half a year, and the construction of the house is in charge of special personnel. However, some issues related to the laboratory structure and reserved equipment space need to be considered in advance. Fan Lei, as the representative of the Biomedical Research Institute, Constantly communicate with the construction party and other departments.

This is actually a bit like decoration, because the corresponding requirements are relatively high, and you need to run and stare constantly. Coupled with the pressure of study, life and graduation, you can imagine how busy Fan Lei is.

It was not easy for Zhao Yi to see him.