The core machine used by the turbofan 10 core machine has been developed and tested for a period of time, and the effect is quite good after installation.

The state stopped investing in the pre-research project of the core machine, which scared the 624 Institute half to death, and the only project in the institute was discontinued like this, so many people up and down want to drink the rhythm of the northwest wind?

And after learning more news later, I finally found that the problem this time was really not simple, and the situation was not what I thought.

The state stopped investing in the core machine, but at the same time, it introduced the Southwest Science and Industry that is now in the limelight, and the Southwest Science and Industry invested in receiving the entire core machine project.

And the state is not saying that it will not be left alone, and it has also allocated money to accelerate the construction of the 101 high-altitude platform, which is a great good thing.

I have long heard of the "spendthrift" of Southwest Science and Industry, and today I am fortunate to cooperate with Southwest Science and Industry, which is definitely much more profitable than national investment.

No, Liu Daxiang, who was originally going to be promoted to the chief engineer and first chief designer of the 624 Institute at the beginning of 86, came to Southwest Science and Industry, and it is necessary to contact the partners in the next few years or even more than ten years.

The two sides have conducted in-depth exchanges in the second institute, and both sides need to reach an agreement on the core machine engineering project in this time.

Yang Hui came to the conference room between the recesses, there were not many people inside, but it could be seen that they were all skilled in technology, and it was no exaggeration to say that if they came here, they would explode. I'm afraid that the talent of the aero-engine industry of the republic is really going to be broken.

Starting the meeting again, Yang Hui sat down and listened carefully. Liu Daxiang is introducing the components of the core high-pressure compressor pre-developed by the 624 Institute, and the components of these high-pressure compressors. Academician Liu Daxiang thinks it is very good.

Although it is the core engine of the copycat F404 engine, everyone is willing to calm down, slowly gnaw the bones, and choose to start step by step from the most basic compressor blades.

This is much better than not understanding anything, directly taking someone else's whole machine to survey, mapping, production, and then erupting into all kinds of difficult to solve problems.

In addition, the F404 is also a pretty good engine, so there is nothing wrong with learning and using it in copycats.

Choosing to take it is better than not understanding anything yourself, but also self-righteous and starting from scratch. You have to design everything yourself, and there are too many realities to come.

"Our 624 Institute has completed the development of high-pressure compressors, and the finished products have been tested, and they are not bad in all aspects, and the booster ratio and efficiency have very good performance, which is supported by specific test data in our ground tests."

Liu Daxiang came prepared this time, not only brought people, but also brought a lot of copies of key data, and now it is in front of everyone. Some people have long been eager to pick up this part of the high-pressure compressor data and study it carefully.

Yang Hui didn't speak, he also picked up the information provided by the 624, and silently compared it with the data of the F404 engine in his heart. After the comparison, Yang Hui more and more identified the core machine technology pre-developed by 624, which is absolutely inseparable from the technology of F404.

Put down the information. Yang Hui didn't bother to look at these technical materials again, what was the problem. I'll pick it out myself later, so I won't talk about it now. By the time the problem is discovered later, it will be too late.

However, in the face of the 624 institutes that will have in-depth cooperation with the base in the future, Yang Hui feels that the method of speaking should be carefully studied, everyone is a family, and they can't hurt their harmony for an American engine.

"Everyone has also read these materials, so let's express their opinions, we have spent most of our energy in the pre-research work in the first five years, and we have a very in-depth study of this group of high-pressure compressors."

The 624 research is indeed very in-depth, but due to the constraints of the conditions, the high-altitude performance of this group of high-pressure compressors has not been tested, which is precisely the biggest hidden danger.

Looking around, no one stood up to ask questions under Yang Hui's hair, Yang Hui finally stood up, and he, the pastemaker, had to stand up again to attract firepower and act as the focus of contradictions.

"Chief Engineer Liu, I have read the information of this group of high-pressure compressors, the data is indeed very good, compared to the United States F404 is not much better, if it can be developed, it must be the international advanced level. But in these data, I don't see the compressor efficiency curves of this group of compressors at different heights, so these data are still a little incomplete, right? ”

As soon as Yang Hui said this, someone really discovered this problem, and Wu Dabo, who was responsible for the research and development of the turbofan 10 combustion chamber, also participated in the exchange meeting of the new core machine.

Hearing Yang Hui's question, according to what Yang Hui said, he re-read the information, and he really didn't find even the slightest bit of data about the different altitude efficiency changes of this group of compressors.

Soon, everyone found out about the question raised by Yang Hui, although they all suppressed their curiosity and surprise and did not ask it, but the expressions on everyone's faces could not be concealed.

Liu Daxiang of 624 also has something to say at this time, doing scientific research is yes, there is no, there is no, and you must not talk nonsense.

Seeing that someone asked about the change data of compressor efficiency at different heights, he did not hesitate to tell the truth about the current situation.

"Regarding this issue, I can responsibly say that we have not done this test yet due to the construction of test equipment, so there is no such data."

Sure enough, there is no data in this regard, Yang Hui already knows it in his heart, and the future generations will go further and further on the road of the F404 core machine, I am afraid that it is because this data has not been found.

"There is no data, which means that this group of high-pressure compressor units may have major defects, right?"

After listening to Yang Hui's words, the 624 Institute obviously felt that the secretary general of the Southwest Science and Industry was targeting himself, and even Chief Engineer Liu Daxiang couldn't hang up at this moment.

Fortunately, he is also almost fifty years old, Chief Engineer Liu Daxiang patiently replied: "What this comrade said is not unreasonable, but it is only this small aspect, and I don't think the problem should be big." ”

Not a big problem. Why is it not big, in the past, the relevant testing equipment of the republic was insufficient. But they are all based on the data to copy the production of Soviet engines and aircraft, and these are all matched.

Problems with the coordination of engine performance and aircraft performance. The Soviets have done it, and they directly produce materials for the republic, and when the republics copy it, they just need to know what it is.

Now it is different, imitating Western engines, there are no imitation aircraft, and the supporting test equipment of the engine is insufficient, so it is impossible to comprehensively test all kinds of data of the engine.

Just seeing that the thrust, thrust ratio or fuel consumption is good, I think it's a good thing, and I take it to the cottage in a daze. Or introduced.

The most typical is the introduction of Spey 202 (turbofan 9), just to see the thrust, fuel consumption is gratifying, busy to introduce. I don't know how the high-altitude performance of this engine is, you must know that at the beginning, this engine was to be installed on the high-altitude interceptor J-9.

Later, when it was introduced, I found that this thing was only suitable for low-altitude flight, and the high-altitude performance was quite rubbish.

Even think about it boldly, the dismount of the Jian-9 is not unrelated to the mistake of introducing turbofan 9 and the failure of the development of turbofan 6. These are the tuition fees paid, and they are bloody lessons.

Thinking of this, Yang Hui felt more and more that he was now responsible for it. Since I know that the current high-pressure compressor unit of the American F404 engine is not as good as the Spey 202, I have to be brave enough to say it.

"Not necessarily, military engines don't perform well at high altitudes. We have suffered this kind of thing once, and the localized turbofan nine is a lesson from the past! When we introduced this engine, we were not going to use it as the current Honyou 6. ”

Yang Hui mentions turbofan 9. Everyone, including the staff of the 624 Institute, also fell into deep thought, if this group of high-pressure compressors really has poor high-altitude performance.

That 624 of its own. To be a sinner of the country, 624 swore to take out a compressor unit with poor high-altitude performance. It is said that the high and low altitude performance is excellent, which leads to major problems in the subsequent research and development......

You must know that the 624 Institute is engaged in advanced technology pre-research, and it is such a big joke, whether you will live in the future.

The atmosphere at the scene was embarrassing for a while, and Chief Engineer Liu Daxiang didn't know how to answer, thinking silently in his heart about what to do if the high-altitude performance of this group of compressors was really not good.

Finally, an insider from the 624 Institute muttered in a low voice: "Our group of compressors, the technology is derived from the American F404 engine, how can the American goods have such a big technical loophole." ”

Although the muttering was very quiet, the conference room was so big that everyone was lost in thought, and it was so quiet that no matter how small the voice was, it could be heard.

Yang Hui heard that someone had led the problem to F404, and he was relieved that it was the internal contradiction of the people just now, and it was too hurt and angry, and now when it comes to the engine of US imperialism, it is the external contradiction. It is necessary to unanimously criticize the outside world fiercely, so that the enemy can feel the cold of the approaching winter.

"The high-altitude performance of this engine does not seem to be very good, and the F18 fighter using F404 is a combat attack aircraft that focuses on ground attack and low-altitude combat, and the flight envelope seems to deliberately avoid medium and high altitudes."

Yang Hui mercilessly pointed out the working environment of the F404 engine, and the Americans only arranged this thing to work at medium and low altitudes.

Originally, it was a little lucky, but when Yang Hui proposed the working environment arranged for this engine in the US Navy, everyone was even more worried about the high-altitude performance of this group of compressors.

At this time, Chief Engineer Liu Daxiang suddenly came up with a good method, which may be worth a try.

"Then we have to find a way to test the high-altitude performance of this group of compressors, the core engine of F404 is still in our institute, we can install the core engine of F404 on the 086 high-altitude engine test machine, and actually test it at high altitude."

Since this group of compressors is a copycat F404 high-pressure compressor, now the domestic equipment is not good, and it is impossible to directly test the performance of this group of high-pressure compressors at different heights, so the high-altitude performance of the core engine of the F404 engine can be tested, and the core machine of F404 can also reflect many problems from the side.

This is a very good idea, it is completely feasible, and Yang Hui also applauded.

"Hey, Chief Engineer Liu's method I think is good, it is completely feasible, since this group of high-pressure compressors is a high-pressure compressor that draws on the F404 engine, then we can directly test the high-altitude performance of the F404 core machine There is no problem, just 086 test machine is in our southwest science and industry to do the turbofan 10 engine test, the F404 core machine can be put into the test."

Yang Hui knew that it was impossible for the 624 Institute to give up the high-pressure compressor unit that had been developed for five years just by relying on himself as a god stick and touching the skin of the mouth. Since just saying it can't be done, then let's use facts to speak. (To be continued......)