The Military-industrial Scientific Research System of the Academic Master Chapter 955

Chapter 955 So...what's the price?

The weekend passes quickly.

November 19th.

Shengjing.

In a conference room of No. 606 Institute.

Ian Vista, who had just gotten off the plane, sat at the conference table with a solemn expression, waiting for the meeting to begin.

Even though he was deliberately hiding it, he could still see the obvious tiredness between his brows.

For someone of Vesta's age, a mere two days' rest before departure was not enough to make up for the fatigue caused by the continuous rotation for the past half month.

Moreover, with such a big deal in mind, even though it is a rest, it is actually not a good rest at all.

Coupled with the relatively closed environment in the conference room, he even felt like yawning.

However, Vesta knew very well that he could never engage in the upcoming talks in this state—

Although it is just a routine work handover, if you feel dizzy, something will definitely go wrong.

He bit the tip of his tongue gently, using the pain to wake himself up a little.

However, this alone is obviously not enough.

Vesta turned around and looked around at several technicians who were also from Snecma.

Including, of course, his deputy, Arthur Mondock.

The latter was currently chatting with Bernard Shore, the technician who called Vista a few days ago, and was obviously trying to understand the recent situation.

After hesitating for a moment, he decided to join in the conversation to distract himself.

"Bernard."

As Vesta's voice sounded, the whispers around him suddenly fell silent:

"I remember you said on the phone before that you were fully involved in their testing process?"

"Um…"

Hearing this question, Xiaor scratched his head in embarrassment:

"Actually, it doesn't count as participation..."

"The cooperation between those Chinese scientific researchers is quite skillful. We don't have many opportunities to intervene. At most, we help to debug the equipment. Most of the time... we can only be regarded as watching the whole process..."

Snecma's original intention of sending them to China was to follow the research and development process here and learn something on the way back.

In fact, at the beginning, several people, including Shore, felt good about themselves.

You know, they are all senior in the company.

There are even people who participated in the round of technological cooperation with China in the late 1980s.

Now that I have to be a student to my former students, my mentality is naturally still different.

According to what Shore and others thought at the time, China should have mastered some tricks specific to CFM56 through some kind of coincidence. As long as they learned it, they would be done.

result…

It's only been two days since the beginning.

Strictly speaking, after attending the technical meeting on the first night, Shore was shocked to find that he could not keep up with the other party's thinking.

He even asked a translator to translate the meeting minutes into English.

But it still doesn't work.

Soon, he realized that what the Chinese had mastered was not some miraculous skill.

Rather, it is a set of almost completely new aero-engine design concepts.

Learn, child!

Of course it is impossible to learn it so quickly.

So, this is the situation now.

They only had time to translate the design information provided by the Chinese and send it back to China.

As for participating in the design work throughout the process...

No one has mentioned it for a long time.

Fortunately, Vista is also aware of this actual situation, so it doesn't make it difficult for Shore:

"It's okay to just keep an eye on the whole process. You should have seen the components they used for testing, right?"

"Of course."

Xiaoer finally breathed a sigh of relief.

After all, it would be a bit embarrassing if you don't know everything you ask:

"The parts they have completed so far include the turbine discs and turbine blades of all high- and low-pressure turbines. Of course, only 4 blades of the same number have been produced. After all, it is only a component-level test..."

He was only halfway through his words when he was interrupted by Vesta:

"A considerable part of the Chinese aviation industry standards are borrowed from us. Of course I know this process..."

And the voice of these words actually became smaller and smaller as he spoke them.

Because at the beginning, Vesta almost instinctively felt that this matter was quite shameful.

But mid-sentence it felt wrong.

Others have borrowed a bunch of industry standards from you, only to overtake you later...

It doesn't seem like something to be proud of...

"Ahem—"

Vesta had no choice but to cough twice to cover up her embarrassment, and then continued as if nothing happened:

"I just want to ask, have you ever paid attention to the specific design of the cooling system?"

These contents can actually be seen after getting the design plan later.

But on the one hand, Vesta is feeling sleepy, and on the other hand, it is impossible for them to believe whatever others say.

There has to be some other information channels as circumstantial evidence, right?

"Attention."

Shore replied:

"From a technical perspective, it is still traditional air film cooling, and does not use new technologies such as impact cooling or double-layer walls. However, the internal characteristics of the air film holes are very complex, with non-standard variable cross-sections, and there are Three-dimensional structure…”

"As for the design process, I..." Vesta waved his hand towards Shore:

"It's enough for you guys to get this information."

"If you haven't kept up with the design stage, you haven't kept up..."

He led a team by himself and spent more than 20 days thoroughly understanding the technical information of the M88-2 engine. Naturally, he could not place any higher demands on his subordinates.

However, Shore shook his head:

"It's not that we didn't keep up, it's that..."

At this point, he paused:

"Yes...we didn't notice that they had a design process..."

"What?"

Vesta, who was still holding back his tiredness, suddenly stopped feeling sleepy:

“No design process?”

"Yes."

Shore explained:

"The special-shaped air film holes they used should have been designed a long time ago. On the M88-3, the arrangement of the hole locations was just slightly adjusted..."

He obviously wanted to say something more.

But at this time, the door of the conference room was pushed open.

A group of Chinese representatives headed by Liu Yongquan came in one after another from outside.

"Sorry to keep you waiting."

Liu Yongquan took the initiative to step forward and shook hands with Vesta:

“On behalf of China Aerospace Power Group, I welcome our partners!”

After some polite and innocuous exchanges, the two parties, each with their own thoughts but the same goal, sat down at both ends of the conference table.

Everyone had a technical document in two languages laid out in front of them—

Just a brief overview of course.

Detailed technical documents, even if stored on a hard drive, can fill a lockbox the size of a schoolbag.

"Dr. Vesta."

While talking, Liu Yongquan turned on the projector on the table:

"Now, let me give you a brief introduction to the main design content included in this handover."

The representatives from Snecma across the way immediately cheered up and looked at the curtain on the wall on one side of the conference room.

When no one was paying attention, Liu Yongquan took out the black leather notebook that he had prepared long ago, and under the cover of the projector host, he spread it out in front of him:

"According to the upgrade plan we have agreed upon before, the main improvement of the M88-3 engine is the thrust envelope in the range of altitudes below 10,000 meters and speeds below Mach 0.9..."

He first briefly introduced the expected effects after the upgrade is completed, as well as the current upgrade progress, and then got to the point:

"In order to optimize thrust without increasing fuel consumption or affecting the cycle life and reliability of the aircraft engine, we redesigned the entire hot end of the M88-3 engine, especially the fuel atomization system and the film cooling system. , to obtain a higher temperature in front of the turbine..."

While Liu Yongquan was turning the pages of the PPT, Vesta finally asked the question he wanted to ask the most:

"Dr. Liu, less than three months have passed since we first finalized the upgrade route for the M88-3 engine. How can you make such drastic adjustments to the hot end?"

Liu Yongquan smiled slightly after hearing this.

He was actually prepared for this problem:

"First of all, during this period, we concentrated all our technical strength on upgrading hot-end components, so the progress was relatively fast."

"After all, the SeA series engines on the Falcon Z project have to share the hot end with the M88-3. The time is tight and the tasks are heavy, so there is no room for any delay."

"In addition, I should have mentioned before that in fact, this cooling system, especially the dustpan-shaped three-dimensional air film hole shown on the PPT, is a mature technology that we have been researching for a long time. As long as it is slightly targeted at M88-3 The engine can be adapted to meet the technical needs..."

In fact, Liu Yongquan did not tell the truth completely -

The cooling system design of the M88-3 is almost completely copied from the turbofan 10. In fact, there is no targeted adaptation...

Of course, if you say this, it will be difficult for our friends.

After hearing Liu Yongquan's explanation, Vista also turned his attention to the curtain again.

Then, his eyes widened instantly.

"this…"

As Shore said just now.

This air film hole design includes gradient cross-section, gradient aperture, three-dimensional structure, internal microstructure of the channel and multi-layer rows, which can be said to have all five poisons.

Although the test data marked below is indeed very eye-catching, Vesta is a little afraid to think about how this thing will be mass-produced by then...

But at this time, Liu Yongquan started to introduce the advantages and cooling principle of this three-dimensional special-shaped hole again, and Vesta was not easy to interrupt.

It wasn't until almost forty minutes later that the entire introduction came to an end that he finally got a second chance to speak:

"Liu..."

Vista quickly stopped Liu Yongquan from opening a new PPT:

"I would like to ask...according to your design, there are almost 50 groups of air film holes on a single turbine blade, and the internal structure of each air film hole is so...complex."

“Have you ever considered the issue of production hours?”

Liu Yongquan raised his head, stared at the frowning Vesta and commented for a while.

Then, he let out a vague sigh.

"well…"

"Dr. Vesta, we use the most mature air film cooling technology with the smallest air flow loss. Just by optimizing the air film design, the temperature in front of the turbine is increased by about 110K. This is already the limit of the current technical level. "

"If you switch to impingement cooling, you can certainly reduce the structural complexity, but it will lead to increased gas loss, affecting about 3-5% of the full envelope thrust, and reliability will also be affected."

"In comparison, it only consumes more working hours now. It shouldn't be an unacceptable price, right?"

(End of chapter)

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