"We want to achieve the turbojet 13 push, there will be many ways, we get the turbojet 13, the most important thing is to improve the high-temperature turbine first, we can use directional solidification without margin precision casting composite hollow cooling turbine blade technology."

The name is very long, and it looks like it sounds high-end, but in fact, this technology is kneaded together by a number of second-rate technologies of aero engines, and these technologies can be done relatively easily in China.

It is quite difficult to orientally solidify materials, but it is no longer a tall thing in the eighties, and Sun Legend, a great god of Beihang Institute of Materials, has already overcome this problem.

No margin precision casting, as the name suggests, is to directly cast the finished casting in one step and no longer need to machine the casting, this technology is also a kick in the door in 83 years.

In the early days, there was a lot of research on this technology in China, the most important thing was that this process was used in the introduced turbofan 9, and now if this technology is needed, this technology can be directly used.

In fact, the dismounted turbofan 9 has already made the first engines that have been tested in the UK. This shows that this technology has been mastered in 83 years, and the subsequent turbojet 13 turbojet 14 have adopted the precision casting process without margin.

As for composite hollow cooling, the most important thing is the word hollow, which is not a problem for the aviation industry of the Republic, when Shi Changxu, the leader of the Chinese material industry, carried out a lot of research on hollow cooling technology.

In the end, it was a complete success, making the Republic the second breakthrough in the technology of hollow cooling blades after the United States, and in the introduction of turbofan 9, this technology was the only one that exceeded the technical requirements of the United Kingdom that year. This is also the reason why the state media has been boasting about the turbofan 9 technology to surpass the UK.

The above three technologies were not very advanced in the eighties, and the republic had already mastered them, so the preliminary conditions for the integration of the three technologies at this time were already in place.

For the technology proposed by Yang Hui, Director Bai has already considered it.

"Well, the new blade technology you said is indeed very feasible, directional solidification materials, no margin precision casting, composite hollow cooling three technologies now we are looking for other brother units, can also get the technology, and finally the whole on a blade needs more tests on it, this can be adopted."

Hearing the affirmation of Director Bai, who specializes in engines, on the first improvement proposed by Yang Hui, the other participants let go of their contempt at the beginning, but had more expectations for the improvement plans in the future.

Yang Hui saw that his proposal for improving the high-temperature turbine passed, and continued to say below.

"Another point is that we can directly apply the improved technology of the Turbojet 7B to the new Turbojet 13. Again, this would be a big step forward. ”

The turbojet 13 of the technical role of turbojet 7B on the turbojet 13, this sounds wrong, the turbojet 13 is originally an improved version of the turbojet 7, and how to use the technology of the turbojet 7 to the turbojet 13. But the insiders present at the meeting knew what this meant as soon as they heard it. A word B is added after the turbojet 7, indicating that this is the second modification of the turbojet 7 imitating the Soviet Union.

In the two modifications, the combustion chamber was modified, and the technology of sub-zone pressure supply and direct flow fuel injection rod was used, and the modified turbojet 7 effectively reduced the weight by 70 kg and shortened the length by 560 mm compared with the prototype turbojet 7.

These new technologies can be applied to the turbojet 13, although the thrust increase is not large, but the reduction of 560 mm and 70 kg weight is definitely a huge leap.

This improvement scheme using turbojet 7B technology is indeed true in the improvement of turbojet 13 in later generations. So it's not a big technical problem to propose adoption now.

Since the base is now producing turbojet 7B, everyone naturally knows more about this engine. , even Chief Engineer Yu, who is not too professional in engines, applauded Yang Hui's plan.

"Well, this improvement is really good, and we can do a lot more with this 560mm of space, not to mention the weight saved."

"Go on, the plan you said will do." Director Bai became more and more curious about Yang Hui's follow-up improvement plan.

After talking about the two relatively simple improvement plans, Yang Hui began to say that the next two improvement plans, the latter two plans are more laborious to change, and these two plans need to spend money and do research.

"There are two other options, one of which is to change the ring tube combustion chamber of the turbojet 13 to an annular combustion chamber."

The ring pipe is changed to annular shape, this improvement scheme actually has little impact on the thrust of the engine, but this annular combustion chamber is necessary for advanced engines.

The shape of the combustion chamber has a more advanced structure, has the advantages of good combustion, uniform temperature, simple structure and light weight, but does not help much to improve the thrust. This improvement measure made Director Bai not quite understand.

"Changing the combustion chamber doesn't seem to help much to increase thrust, right? Do we need to do this with this engine? ”

Two questions, so cute, Yang Hui said in his heart: Director, don't be so honest, the thrust is not increased much, but this technology must be mastered in the future, and now that you have the opportunity, will you save money for foreign parties?

Thinking like this in his heart, Yang Hui was naturally about to say it in his mouth, which must transform the director's "backward thinking".

"Now we want to say that there is an opportunity for foreign investment, we must solve this technology, and this annular combustion chamber is what we have to do sooner or later."

'Nima, this ......'

There is no such word in 83 years now, but there is no word that can directly express the hearts of the directors and others more directly than this word.

"Yang Hui, you said we, this ...... Do this...... Really good"

Although the director was very disdainful of Yang Hui's behavior at first, after thinking about it, the director became more and more calm. Yang Hui's plan to borrow chickens and eggs is too tempting, and as the director of a scientific research institute who has no money to do research and development, he can't stop this idea.

is still struggling with whether this is good or not, Yang Hui is now a big reason.

"Director, how did we get out of the way, once our annular combustion chamber is made, it is appropriate to improve the performance of the new engine to another level. This is not fraudulent at all, and this annular combustion chamber is now popular internationally. We don't have anything, and I'm afraid the foreign side won't be optimistic about our project. ”

When it comes to Saudi Arabia, it is fashionable and popular. What else can we say, we only need an excuse, as for whether it is reliable or not, whether it is reliable or not, what we want is just an excuse.

With an excuse, everyone is naturally pushing the boat, and this new model really needs to improve the combustion chamber. They all selectively forgot that the combustion chamber did not increase the thrust much, and said approvingly.

"Okay, I think this measure can be had."

"What do you mean to have? This is a must-have."

……

Seeing that everyone accepted his proposal, Yang Hui immediately put his mind at ease, this is right! We just have to keep up with the international trend, not only in terms of technology, but also in terms of ideology, we must also keep up with those capitalist aircraft manufacturers, so that we can be ruthless.

Director Bai agreed with Yang Hui's new plan to borrow chickens and eggs, but thought about several improvement plans that Yang Hui was proposing now.

It is possible to increase the thrust of the new machine to a maximum of 6.8 tons, which is considered to be the top of the sky, and if you want to achieve a minimum thrust of 7 tons or even more, this engine is obviously not enough.

"Alright, let's talk about your last engine improvement project, and we'll hear what you're going to do."

Speaking of the last project, Yang Hui is finally going to show the last killer feature, this improvement measure can not only improve the thrust, but the most important thing is that it will greatly improve the scientific research ability of the entire base research institute, and of course, it is also a test.

"That's right, the previous improvements alone will never increase enough thrust, so we can't just focus on the turbojet now."

If you don't focus on the turbojet, it will naturally be a turbofan, but changing the turbojet 13 to a turbofan seems too challenging to think about.

Liu Changzi of Liyang was the first to speak, although he had planned to jump out of the "big pit" of Liyang as soon as possible, but he still felt dizzy for the proposal that Yang Hui was talking about now.

"You said to change to a turbofan, you think the aero engine is a dough! You can pinch it however you want. Did you know that the technology of turbojet and turbofan spans? ”

Although other people don't agree with Director Liu, they still feel too troublesome to change the turbofan.

"Tell me what to do, I'm sure you have your own consideration for this suggestion."

After speaking, Director Bai looked at Yang Hui, ready to listen carefully to Yang Hui's ideas to see if it was feasible.