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, Du Yishan asked Chang Haonan next to him.
The drivers who can drive for Du Yishan are also specially arranged. Naturally, work matters can 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 that you would choose this way.”
Du Yishan smiled and continued:
“During the period after I came back from Nanzheng, the 611 Institute Bian has asked many times, openly and secretly, saying that he wants you to come over and help them match their new models. What do you think?”
"In addition, this time Cheng Haonan said that they will apply for horizontal projects for us, and we will 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 horizontal funds can even be directly divided 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 funds.
Although there are various ways to create clever names, after all, they are not as comfortable as holding just money.
Du Yishan’s emphasis on horizontal issues was obviously to express the sincerity of the 611 Institute.
But in fact, these details were originally agreed upon by Chang Haonan with Lu Yuying in Xiangzhou, so they did not surprise him.
“Of course there is no problem in doing the 611 project. Their J-7F is now considering replacing the turbojet 14, and our country’s independent third-generation aircraft No. 10 Project is also being worked on there. It is better to say that this is also the case. My next plan.”
“In that case, I will give a definite reply to 611 tomorrow,” Du Yishan said, raising his watch and looking at the date:
"Today is December 16th. If everything goes well, the design finalization appraisal may be placed 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 Shaking 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 restricted by objective conditions and could only match Feifa. The focus is on the aircraft, 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. Follow up on the aviation engine situation there. After all, our second-generation power turbojet 14 and third-generation power turbofan 10 are both in charge of the 606 and 410 factories.”
"Turbofan 10..."
Du Yishan took off his glasses, took out a piece of suede and gently wiped the lenses, then put them back on:
"Do you think the current ten With the progress of the "Taihang" project, is there any hope that the Turbofan 10 will 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 a stumbling block. In the end, it was Chang Haonan who came to the rescue with a plug-in, not to mention the estimated thrust ratio. 7.5-8 stage high thrust turbofan. So what is the current progress of this project...
Basically there is no progress.
Chang Haonan was able to improve the Turbojet 14 in a few months. In addition to the system as a backing, the more important reason is that this model itself has a high level of completion. Just modify it based on the original design.
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 less efficient, he can still build what is on the drawing. .
But Turbofan 10 is a completely different story.
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 with the car running, it is impossible for Chang Haonan to build a brand new third-generation model from scratch in 14 months.
Frankly speaking, even if he wanted to actually start the design work on the turbofan 10 within 14 months, it would be quite difficult -
When the Taihang engine project was established , there is a serious lack of preliminary research.
To put it bluntly, it means something big and quick.
This results in that although the project is 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 quite smooth. After all, the turbofan 10 has to start from scratch. It has to be rushed. The first flight is probably out of the question.”
But before Du Yishan could answer the question, the conversation changed again:
"But just like the J-8C, it will first fly in an incomplete state, and then 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. This is done Feifa’s matching work will be almost boring after all.”
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 is definitely 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 606 Institute and the 410 Factory can accumulate some experience in the production and improvement process of the turbojet 14, including myself, and 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 10. When I was studying the stability of the flight-engine in Fucheng, I used to follow the aircraft With similar ideas to wing flutter control, we have conceived an active engine surge prediction and suppression system. We can take this opportunity to actually test the feasibility.”
After hearing this answer, Du Yishan thought in his heart. Secretly he breathed a sigh of relief.
For a moment, he began to worry that he, a talented student, might be drifting because his experience in the 83rd Project was too smooth.
But 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.
It is really unfounded to worry about.
"Then follow your plan."
(End of this chapter)