Naturally, Europeans, especially southern Europeans, cannot expect too much from their work efficiency.

Although for the leader Pierre, the current situation of the NH90 project is close to burning his eyebrows, so his subjective initiative is full, and he can't wait to pull Wang Xibo to burst his liver every day.

But his other technicians don't share that sense of urgency.

After all, there is also a high top when the sky falls, which has little to do with the workers below.

As an old power in Western Europe, the last time France faced the danger of extinction was 50 years ago, and now it does not have the same sense of urgency that the Chinese people faced in this era.

For most people, the Cold War is over, and I can't enjoy it anymore?

Moreover, on the other hand, Wang Xibo flew thousands of miles from the ice city to Marseille, and he was not specifically to serve Pierre.

As the director of the avionics design laboratory of Bingcheng Aircraft Industry Group, his main focus is definitely on learning the NH90 fly-by-wire flight control technology.

Helping Pierre digest and absorb the design plan brought by Huaxia can only be regarded as a normal performance behavior.

Therefore, after receiving this new batch of technical information, the NH90 project is indeed advancing a little faster than before.

But not much.

It will take a month to build a new drivetrain and replace it with one of the prototypes.

At the same time that Wang Xibo led the team to work in France, Chang Haonan had also finished his short vacation and returned to Shengjing.

Although the component-level test of the turbofan 10 was quite smooth, it was also a key node of the project, and it was not good for him, the chief designer, to be the boss all the time.

In particular, the fan and high-pressure compressor also involve his idea of using the active control technology of blade separation flow to accurately use the vortex structure in the diffuser grille.

"In the end, it has to be Mr. Chang, the results of the actual experiment, and the theoretical value of the design scheme, the difference is only 3.6‰, less than 5‰, which is simply ......."

"It's a god'......"

More than a dozen core members responsible for the general design of the turbofan 10 and the compressor part are standing in front of the compressor test bench, looking at the report that has just been sorted out by the operator.

Haiyide looked at the boost ratio of 25.16 in the results column, and his tone was half admiration, half disbelief.

Previously, when determining the design index of turbofan 10, Chang Haonan determined the total boost ratio in the range of 25-25.5 to ensure that both installed objects can achieve a good balance between subsonic and supersonic performance.

But normally, there will be some differences between the location of the design point and the actual product.

It often takes several or even a dozen iterations to really achieve the desired performance.

In the previous theoretical calculation and design stage, Haiyide also thought about whether it was possible to reduce the time required for this process, or even achieve it, with the extraordinary level shown by Chang Haonan.

But I thought about it.

When a miracle actually happened in front of his eyes, he still inevitably felt a sense of unreality.

Naturally, Chang Haonan also saw this gratifying result, which means that the time spent in the component-level testing process can be further reduced.

"Such a good result...... It doesn't exactly count on me. ”

Hearing Hai Yide's words, Chang Haonan redirected his gaze from the report in his hand to the compressor on the test bench, and replied.

Actually, this sentence is definitely from the heart.

If he uses his current level and combines the capabilities of computers in this era, then the design can definitely still be designed, but a slight deviation and a few corrections are inevitable.

And to be able to get a result of 25.16 at one time when the design point is 25.25 still depends on the role played by the system.

However, when this sentence heard in the ears of others, it was natural to think that Chang Haonan meant that other people here had also made significant contributions.

So they all said that they were just doing their job under the leadership of President Chang, and they didn't dare to be greedy for the merits of the sky.

This misunderstanding was not harmful to Chang Haonan, and he couldn't explain it additionally, so he just smiled and shifted the topic to another place:

"The testing of the remaining components will also need to be accelerated, especially the combustion chamber and the turbine. These two hot-end core subsystems, together with the high-pressure compressor, basically determine the key core performance characteristics of the engine. ”

"With the performance characteristics, especially the air intake characteristics, I can optimize the design of the aircraft according to the attributes of the engine."

"The design of the aircraft?"

Hearing Chang Haonan suddenly mention the outflow of the aircraft, that is, the aerodynamic design part, Hai Yide was stunned for a moment, and some didn't keep up with the train of thought:

"What do you mean ......"

"In the past, our aero engines were completely or partially imitated, and many of the performance parameters in all aspects were not decided by themselves."

Chang Haonan put the test results back on the table next to him, and said as he turned around and walked out:

"Coupled with the fact that the design level and manufacturing level are not very good, the specific performance of the engine may be unknown before it is installed."

"Therefore, in the development and transformation matching, it is mainly to broaden the adaptation range of the air intake, so as to match the engine performance indicators that do not know what the results of the lottery draw as much as possible."

Hearing this, several people, including Haiyide, showed some embarrassed expressions or actions.

After all, the problem Chang Haonan said does exist.

The long-term "heart disease" in the field of aviation power has indeed put a lot of intensity on the overall design department.

Although it is true that there are some engine models that have been suspended because of the cancellation of the aircraft program, in fact, the reverse is the case that the aircraft model dies due to insufficient engine level, and there are many more cases.

Weight training belongs to yes.

Of course, Chang Haonan obviously didn't want to emphasize this, so after a short pause, he immediately changed the conversation;

"However, now that we have the first completely independent research and development and independent intellectual property rights of the engine model, then at the level of aircraft development and change matching, we can go to the road of improving the matching accuracy."

"This is also something that I have long determined with the 611 Institute."

What Chang Haonan said is naturally to replace the DSI inlet and make overall improvements to the aerodynamic design of the J-10 second-stage prototype -

Although the turbofan 10 has two main installed objects, the J-11's adjustable air intake has an extremely wide range of applications, and as a heavy fighter, it is not inferior to the weight of two or three hundred kilograms, so there is no need to put too much effort into the development and transformation matching.

"Also to ......"

After hearing Chang Haonan's answer, Haiyide patted his head lightly:

"During this period of time, I almost forgot that Mr. Chang was originally engaged in aircraft design......

"Then you mean that the current design of Project 10 still has to be changed?"

At present, the people next to Chang Haonan are all people in the field of aviation design, although they have not yet separated, but after all, there is a layer of relationship between them and several general offices.

In particular, the location of the 611 Institute is still more than 2,000 kilometers away in Rongcheng.

So it's normal that they don't know much about Chang Haonan's plan for the J-10.

"Of course."

Chang Haonan immediately gave an affirmative answer, and then asked:

"Guihang's new model that first flew last year, Jianjiao 9, should know, right?"

Haiyide nodded:

"This naturally knows that the head office also issued a special topic at the end of last year to introduce them through this model to tide over the difficult stage and achieve an advanced model of turning losses into profits."

"I'm going to replace the J-10 with a DSI intake like the J-9, which can reduce some weight and help the performance of the aircraft."

Everyone is a member of the aviation system, and the secrecy is high enough, so there is nothing to hide.

As a fighter, the flight conditions faced by the J-10 are far more complex than those of the J-9, so the requirements for the design of the air intake will be higher.

The general impression is that "the DSI intake is not good at high-speed flight".

In fact, this is a complete misunderstanding.

The DSI inlet tract is only narrowly optimized.

A typical example is the scramjet engine on many hypersonic weapons, which also uses the DSI air intake.

It's just that there is still a difference between missiles and airplanes after all.

The former can rely on boosters to get through this phase of inlet inefficiency.

However, for general aircraft, it may not be used in high-speed conditions, but it can always be used in low-speed conditions, so there is no choice of "only optimizing high speed and not low speed".

But then again, if the intake tract is wide enough, it is not impossible to extend the dominant operating range to the transonic range......

(End of chapter)