The Military-industrial Scientific Research System of the Academic Master Chapter 172

Chapter 172 Imagination of high-thrust turbofan engine

At the same time, the master and the apprentice had already finished dinner in Jinjude and sat on the special car returning to Beijing Hang University.

“Xiao Chang, according to the current progress, the J-8C should be able to complete the design and finalization soon. Do you have any ideas about the future research direction?”

After the car started moving, Du Yishan asked Chang Haonan next to him.

The drivers who can drive for Du Yishan are also specially arranged, and work matters can naturally be discussed in the car.

"I think the experience of participating in the 83rd Project during this period is very good. It can not only ensure a certain degree of freedom in research directions, but also deeply participate in the project development process, so it is best to continue using this model. Go down."

Chang Haonan almost immediately gave the answer he had thought of for a long time.

“I guessed you would choose this way.”

Du Yishan smiled and continued:

"During the time after I came back from Nanzheng, the 611 Institute asked me many times, both overtly and covertly, saying that they wanted you to come over and help them match their new models. What do you think? "

“In addition, this time Chengdu said that they would apply for horizontal projects for us, and we would have more freedom in the use of funds.”

This sentence is not very clear, but Chang Haonan can naturally understand it.

The so-called horizontal projects are actually research projects signed directly between enterprises and university research groups, without going through ministries, local governments or other national agencies, so management will be much easier.

For example, according to the regulations of some schools, up to 30%-50% of the horizontal funds can even be directly allocated as "project team commission", and the remaining balance can be used as project research funds.

This item is definitely not included in the general vertical project funding.

Although there are various ways to create clever names, after all, they are not as comfortable as just money.

Du Yishan's emphasis on horizontal topics is obviously to express the sincerity of the 611 Institute.

But in fact, these details were already agreed upon by Chang Haonan with Lu Yuying in Xiangzhou, so they did not surprise him.

"Of course it's no problem to do the 611 project. Their J-7F is now considering replacing it with a turbojet 14, and our country's No. 10 independent third-generation aircraft is also being developed there. Rather, this is my next plan. ”

“In that case, I will give a definite reply to 611 tomorrow.” Du Yishan said as he raised his watch and looked at the date:

“Today is December 16th. If everything goes well, the design finalization appraisal may be scheduled around New Year's Day, so you can consider waiting until after the Spring Festival to directly join the work of 611.”

However, Chang Haonan shook his head:

"There is no need to wait until after the Spring Festival. I can start working immediately after I return to Shengjing."

“In the past, we were limited by objective conditions and could only focus on the flight engine matching. But this time, I am going to change my mind and try to design with the aviation engine as the center.”

"So even if I am doing a project for 611, I plan to go to Shengjing first to follow up on the aviation development situation. After all, our second-generation power turbojet 14 and third-generation power turbofan 10 are both produced by 606 and 410 factories. In charge.”

“Turbofan 10…”

Du Yishan took off his glasses, took out a piece of chamois leather and gently wiped the lenses, then put them back on:

“Do you think that with the current progress of Project 10, there is still hope for Turbofan 10 to catch up with its first flight?”

In terms of project establishment time, the Turbofan 10, known as the "Taihang", is actually not much later than the Turbojet 14.

However, with China's current aviation power level, even the development of a turbojet with a thrust-to-weight ratio of 6.5 is stumbling. In the end, it was Chang Haonan who came to the rescue with a plug-in, let alone one that is expected to have a thrust-to-weight ratio of 7.5-8. A high-thrust turbofan. So what is the current progress of this project...

Basically there is no progress.

Chang Haonan was able to modify the Turbojet 14 in a few months. In addition to the system as a backing, the more important reason is that the model itself has a high degree of completion. He only needs to build on the original design. Just modify it.

Furthermore, the requirements for materials and manufacturing of the turbojet 14 are relatively low. As long as he comes up with a good enough design plan, even if the 410 factory is a little less efficient, he can still build what is on the drawing.

But the Turbofan 10 is a different story entirely.

According to the original timeline, the J-10 would make its first flight in March 1998.

It is now December 1996, and the No. 01 prototype equipped with the AL-31FN engine is actually close to rolling off the assembly line.

Even if the car is turned on, Chang Haonan cannot build a brand new third-generation model from scratch in 14 months.

Honestly speaking, it would be quite difficult for him to actually start designing the turbofan 10 within 14 months—

When the Taihang engine project was established, there was a serious lack of preliminary research.

To put it bluntly, it means something big and quick.

This has resulted in that although the project has been put on the table, many preliminary preparations have not been completed.

So Chang Haonan shook his head very simply:

“I heard that the progress of the No. 10 project at the 611 Institute is pretty smooth. After all, the Turbofan 10 has to start from scratch. It is probably impossible to catch the first flight.”

However, before Du Yishan could answer the question, the topic changed again:

“But just like the J-8C, it will first make its first flight in an incomplete state, and then later install new domestic power and adjust the inlet design to catch up with the finalization node. I think this is still promising.”

"The overall performance of the AL31FN engine is acceptable, but in any case, it is a Russian design after all. It is impossible for the Salyut Design Bureau to adjust according to our needs, or to customize the performance details of the engine. It's always a bit boring when you send a matching job.”

This answer is obviously beyond Du Yishan's expectations, especially the part about letting the turbofan 10 catch up with the J-10 design finalization node:

“Tell me about your specific plan?”

Chang Haonan did not give his answer immediately, but lowered his head and thought for a few minutes:

"First of all, high-thrust turbofans are still too far ahead of our current aero-engine research level. I could feel it when I modified the turbojet 14 before. The current design ideas, design tools, material levels, and process levels are all It's not enough, so when I return to Shengjing this time, the focus will definitely be on the turbojet 14. After all, the J-7F is a single-engine aircraft, and its aviation engine requirements are somewhat different from the J-8C, so some parameters need to be fine-tuned.”

“In addition, both the 606th Institute and the 410th Factory can accumulate some experience in the production and improvement process of the turbojet 14. Including myself, we also need to further improve our understanding of aviation power. This can also be regarded as technical preparation for the Taihang project.”

"So after completing the flight engine matching work for the J-7F, I should first participate in the preparations for the first flight of Project No. 10. Just when I was studying the stability of the flight engine in Fucheng, I used to follow the wing flutter. With the same idea of control, we have conceived an active engine surge prediction and suppression system, and we can take this opportunity to actually test the feasibility. "

After hearing this answer, Du Yishan secretly breathed a sigh of relief.

For just a moment, he began to worry that he, a talented student, might be a little drifting because his experience in the 83rd Project was too smooth.

However, judging from the plans Chang Haonan made for himself, he still maintains a calm and objective assessment of himself and the level of China's aviation industry as a whole.