The Military-industrial Scientific Research System of the Academic Master Chapter 477

Chapter 477: Let's work **** vertical takeoff and landing...

At the beginning, Chang Haonan did design a complete 3-7-1-1 structure, and even directly raised the sea level thrust-to-weight ratio to an astonishing level of 9.5-10.5.

It is completely a fourth-generation engine.

However, he soon realized that even if he cheated, it would be impossible to actually build this thing in a short time.

So we simply made some fine-tuning and performance compromises, and removed one stage of the fan, resulting in a somewhat peculiar 2-7-1-1 structure.

Of course, even so, the overall performance of this turbofan 10 is enough to be among the best among today's military aero engines.

Anyway, it's definitely no problem to sit five and look out to three.

Chang Haonan's statement directly messed up the atmosphere of the entire design review meeting.

What's the point of reviewing this?

Let's learn from it.

Like the blade separation flow active control technology mentioned by Chang Haonan just now, such as boundary layer suction, this technology is still in the process of installation and testing in traditional aviation powers.

To be honest, others are experimenting and we are still on the drawing board, so we are indeed still a few years behind.

But on the one hand, judging from the current catching up speed of China, who can use these technologies first is still a matter of two minds.

On the other hand, being a few years behind was something that would have been unimaginable for China's aviation engine industry in the past.

After all, just two years ago, what everyone was thinking about day and night was how to narrow the gap to less than 20 years!

The best turbojet 13 in the country at that time, to put it bluntly, it was just a limited improvement of the R11F300.

Even when the turbojet 14 was in service, although it made rapid progress, it was mainly due to the low starting point. Just building something would be a huge leap...

However, this turbofan 10, although it is still on the PPT, at least from the overall plan, it is already the top level.

The review meeting must of course continue.

However, the 1250°C turbine front temperature mentioned later and the related technology of full-coverage film cooling of these hot-end components are no longer so shocking in comparison.

It's not that it's not important.

mainly…

Already numb.

There is no longer the feeling that Grandma Liu entered the Grand View Garden at the beginning...

For other attendees sitting further back in the venue, Chang Haonan's paragraph also made quite a few of them realize for the first time what a huge project they were participating in—

That's right, in fact, for a highly complex project, most screw-type participants may not know what they are doing until the end of the project.

This has nothing to do with confidentiality. This is also true for many civilian projects that are not classified.

This is just a side effect of the highly specialized division of labor in society.

“Let's go, Lao Zhou, I just know the design goal of our turbofan 10...is it so exaggerated?”

While an expert group discussion was taking place, Lin Zhibing, an engineer sitting in the back seat in the middle, finished adding the notes he had just jotted down in sketch, rubbed his aching hands and said to another companion next to him.

However, he did not receive any response for a long time after he finished speaking.

　　Looking up, I realized that the other person was still concentrating on writing something in the notebook at hand. Apparently, he didn't hear clearly what he just said.

“Lao Zhou? Refining red?”

After calling out several times, it was obviously the companion named Zhou Lianhong who finally reacted:

"What's wrong?"

Lin Zhibing, who was a little helpless, had no choice but to repeat what he had just said and take a look at the contents of the opponent's notebook.

It is indeed what Chang Haonan just talked about, the thermodynamic model and so on.

But around these contents, there are many annotations and sketches densely marked.

"This is…"

Both of them are from Jianning, Hunan Province, but Lin Zhibing is the engineer in charge of technology at Factory 331, while Zhou Lianhong is an aviation engine designer at Institute 608.

They had known each other at work before, and they were transferred together to participate in the Taihang project. They became familiar with each other over time. However, Lin Zhibing, who was born as a worker, obviously did not understand these contents as well as his friend.

“Oh, I just listened to what Mr. Chang introduced and I have some thoughts. I think it can be used in our work over there.”

Zhou Lianhong answered with his mouth, but the pen in his hand never stopped: "Isn't Bingcheng Aircraft Group been anxious for a higher power engine in the past two years, for the Z-9 carrier type, I have some ideas, just Write it down quickly."

Southern Aviation Power Machinery Co., Ltd. in Jianning is mainly responsible for the R&D and manufacturing of turboshaft and turboprop engines.

Of course, these two types of aircraft engines with output shaft power are different from turbofans in many ways. For example, the compressors are both axial flow and centrifugal hybrid structures, but they are always the same in terms of the most basic thermodynamic principles.

“Hasn't the Turboshaft 8E been delivered to them?”

Lin Zhibing was stunned.

“It's not enough. The Turboshaft 8E needs take-off power to keep the Z-9 in a hovering state in combat, but the take-off power can only be used for 5 minutes at most. It's okay for transporting people, but it's definitely not enough for anti-submarine warfare.”

Zhou Lianhong shook his head and replied:

"So now we are walking on two legs. On the one hand, we are considering introducing the newer Arriel 1M1. On the other hand, we are also striving to improve ourselves on the basis of the turboshaft 8E. After all, foreign exchange is limited and the French ask for high prices. It's not an option to always look for them…”

The whole morning meeting agenda came to an end quickly.

The leaders did not understand the specific technical details and had other things to do, so they would leave Shengjing one after another at noon.

But the expert team will still have to stay for another two days.

Although everyone is not confident enough to review the Turbofan 10 now, even from a long-term perspective, this process must be completed.

During the break after lunch, Jiang Fuhe found Liu Zhenxiang alone.

“Old Dean, in this situation, our institute's high-profile pre-research project...the next step..."

He was indeed a little panicked.

Your "pre-research" progress is slower than other people's officially approved models, so you still need to do pre-research.

However, the funds for developing R79 technical data were raised by 624 itself. If this pre-research project does not go forward, it will definitely suffer a loss.

But if you bite the bullet and continue to do it, the sunk costs will only get bigger and bigger...

“My suggestion is to change the focus of research.”

After all, Liu Zhenxiang has worked in the 624 Institute for decades, and he still understands the basic situation of the old unit.

Judging from Chang Haonan's incredible ability, since he has left room for upgrades in the core machine of the Turbofan 10, it is definitely not a lie.

Breakthroughs in materials and processes will of course be much slower in comparison, but in terms of difficulty, it is not that high. As long as enough resources are invested, many things will come naturally.

By then, this 3.75-generation engine will naturally evolve into a serious fourth-generation engine.

Judging from the capabilities of 624 Institute, it can be said that it has caught up from behind in core aircraft research and development, and has pushed the improved turbofan 10 out of the position of the fourth-generation aviation engine...

It is indeed that difficult.

Then we can only avoid its edge.

“Transform…to where?”

Jiang Fuhe couldn't keep up with Liu Zhenxiang's thoughts for a while.

“For large-thrust engines, judging from the current situation of the Taihang project, there should be no need to continue working on this line.”

The latter had no choice but to further explain:

“But the power system of the R79 can also take off and land vertically. I have seen the design of the three-bearing rotating vector nozzle above. It is quite advanced. You can work hard in this direction next..."

"this…"

The idea of vertical takeoff and landing power was indeed something Jiang Fuhe had never considered.

Mainly based on the strength of China Aviation Industry in the past, it is very difficult to even copy a Harrier, let alone the Yak 141.

Furthermore, the performance of vertical take-off and landing aircraft is bound to be far weaker than ordinary fixed-wing aircraft of the same technical level in all aspects.

For the Chinese Navy and Air Force, which have not even completely retired first-generation fighter jets such as the J-6, it is unlikely that they will rush to pour a large amount of resources into this field.

But the past is the past and the present is the present.

If you want the R79's technical data to continue to shine, I'm afraid this is the only way to take an eccentric approach.

(End of this chapter)

Chapter end

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