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

It's a fourth-generation engine.

But he soon realized that even if he opened it, it would be impossible for this thing to be truly created in a short period of time.

So I just made some fine-tuning and performance compromises, and minus the first-stage fan, and became a bit of a peculiar 2-7-1-1 structure.

Of course, even so, the comprehensive performance of this turbofan 10 is enough to rank among the best in today's military aviation engines.

Anyway, it's definitely okay to sit on five looks.

Chang Haonan's statement directly made the atmosphere of the entire design review meeting wrong.

What else is this reviewing?

Let's learn from it.

As Chang Haonan just mentioned, the active control technology of blade separation flow, such as the suction of the attached surface layer, is also a technology that is still in the process of installation and testing on the side of the traditional aviation power.

If you have to be more serious, others are experimenting, and we are still on the drawings, which is indeed still a few years behind.

But on the one hand, judging from the current catch-up speed on the Huaxia side, it is still two to say who can use these technologies first.

On the other hand, it is a matter of a few years behind, which is something that cannot be dreamed of for the aero engine field in China in the past.

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

At that time, the best turbojet 13 in China was, to put it bluntly, 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 fact that the starting point was too low, and it was a huge leap to make something casually......

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

Of course, the judging meeting has to continue.

However, the 1250°C pre-turbine temperature mentioned later, and the technology related to full-coverage air film cooling for the hot end components, are not so impressive in comparison.

It's not that it doesn't matter.

Mainly......

It's already numb.

There is no feeling of Grandma Liu entering the Grand View Garden at the beginning......

For the other attendees sitting in the back venue, Chang Haonan's content also made a considerable number of them realize for the first time what a grand project they are participating in-

That's right, in fact, for a highly complex project, most screw-type participants don't necessarily know what they're doing until the end of the project.

This has nothing to do with secrecy, and the same is true for many civilian projects that are not classified.

It's just a side effect of the high degree of specialization in the social division of labor.

"I'll go, Lao Zhou, I only know the design goal of our turbofan 10...... Is that an exaggeration? ”

Taking advantage of a panel discussion, engineer Lin Zhibing, who was sitting in the middle and back of the group, finished supplementing the notes he had just written down in a sketch, rubbing his somewhat sore hands and saying to another companion next to him.

However, for a long time after saying that, he didn't get any response.

When I looked up, I realized that the other party was still engrossed in writing something on the notebook in his hand, obviously not hearing what he was just saying.

"Old Zhou? Refining red? ”

screamed a few times in a row, and it was obviously a companion named Zhou Lianhong who reacted:

"What's wrong?"

Lin Zhibing, who was a little helpless, had no choice but to repeat what he had just said, and by the way, he glanced at the content of the other party's notebook.

It is indeed the content that Chang Haonan just talked about, thermodynamic models and the like.

But around these contents, there are also a lot of annotations densely marked, as well as simple pictures.

"It's ......"

Both are from Jianning, Hunan Province, but Lin Zhibing is the engineer in charge of the process of the 331 factory, while Zhou Lianhong is the aviation design of the 608 Institute.

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

"Oh, I just listened to the content introduced by Mr. Chang, and I feel that it can be used in our work over there."

Zhou Lianhong replied, but the pen in his hand never stopped:

"Haven't the Bingcheng Aircraft Group been in a hurry to get a higher power engine for the past two years, and the Z-9 carrier-based type is for it, I have some ideas, so I'll write it down quickly."

Jianning's Southern Aviation Power Machinery Company is mainly responsible for the development and manufacture of turboshaft and turboprop engines.

Of course, there are many differences between these two types of output shaft power and turbofans, such as the compressor is a mixed structure of axial flow and centrifugation, but it is always the same in the most basic thermodynamic principle.

"Haven't the Vortex 8E already been delivered to them?"

Lin Zhibing was stunned.

"It's not enough, the vortex 8E needs to use take-off power to keep the Z-9 in a hovering state in a combat state, but the take-off power can only be used for 5 minutes at most, and it's okay to transport people or something, and it's definitely not enough to be anti-submarine."

Zhou Lianhong shook his head and replied:

"So now we are walking on two legs, on the one hand, we are considering the introduction of the newer Arriel 1M1, and on the other hand, we are also trying to improve ourselves on the basis of the vortex 8E, after all, foreign exchange is limited, and the French ask for a high price, so it is not a way to always look for them......"

……

The agenda for the entire morning meeting was quickly over.

The leaders couldn't understand the specific technical details behind, and secondly, there were other things, so they would leave Shengjing one after another at noon.

But the Group will remain for two more days.

Although everyone is a little unconfident in judging the turbofan 10 now, even from the perspective of long-term knowledge, this process must be completed.

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

"Old dean, in this situation, our institute is highly recommended for pre-research projects...... Next ......"

He did panic a bit.

The "pre-research" on your side, the progress is slower than the model that is officially approved by others, so it is also a hammer for pre-research.

However, the funds for R79 technical data are self-raised by 624, and if this pre-research project cannot go on, it will definitely lose a sum of money.

But if you continue to do it, the sunk cost 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 has some understanding of the basic situation of the old unit.

In terms of Chang Haonan's ability to show against the sky, since he has left room for upgrades on the core machine of the turbofan 10, it will definitely not be a lie.

Of course, the breakthrough of materials and processes will be much slower, but in terms of difficulty, it is not so high, as long as the resources are invested enough, many things will come naturally.

By that time, this 3.75 generation engine will also logically evolve into a serious fourth generation.

Judging from the capabilities of the 624 Institute, it is necessary to say that the core engine research and development is the lagging behind, and the turbofan 10 improved model is squeezed out of the position of the fourth-generation aviation engine......

It's really that difficult.

Then you can only avoid its edge.

"Transformation...... Where to go? ”

Jiang Fuhe didn't keep up with Liu Zhenxiang's train of thought for a while.

"The high-thrust engine, judging from the current situation of the Taihang project, should not be the idea of continuing to play this line."

The latter had to explain further:

"But isn't the R79 power system still able to take off and land vertically, I've seen the design of the three-bearing rotary vector nozzle above, it's quite advanced, you can work hard in this direction next......

"This ......"

The idea of vertical take-off and landing power is indeed something that Jiang Fuhe has not considered.

Mainly based on the strength of the Huaxia aviation industry in the past, not to mention the Yak 141, it is very difficult to reproduce a Harrier style.

Moreover, VTOL aircraft are bound to be far weaker than ordinary fixed-wing aircraft of the same technical level in all aspects of performance.

For the Huaxia Navy and Air Force, which has not even retired from the first-generation fighter such as the J-6, it is unlikely that it will be in a hurry 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 technical data of R79 to continue to exert residual heat, I am afraid that this sword is the only way to take the wrong path.

(End of chapter)