Chapter 308 Cutting-edge technology, but not cutting-edge enough

Lu Yuying was originally promised to do active stability control and surge prediction for the J-10. It was actually before the Spring Festival this year. However, due to various unexpected events after the new year, Chang Haonan has never been able to fulfill his promise.

Moreover, since Lu Yuying was not actually involved in the No. 10 Project, this matter has not yet started until now. It still needs to be communicated with Song Wencong or Xue Chishou who are actually responsible for the No. 10 Project.

Of course, with Chang Haonan's current popularity and influence, there is no need for Du Yishan to do this for him like he did a year ago.

After the meeting, he quickly dialed the 611 number.

Of course, it was impossible for the other party's operator to decide such an important matter, so after explaining his identity and purpose of coming, the call went through several transfers before a young male voice rang through the receiver again:

"Chang Gong, you are such a busy person, why don't you think of contacting us."

"If Mr. Lu hadn't mentioned this when I met you in Yanliang before, we all thought we would be put off by you."

Chang Haonan quickly recognized the identity of the person who answered the call.

Yang Wei, deputy chief designer of Project 10.

When he first saw the J-132 that had entered the final assembly state at the 10 Factory in Rongcheng, the two had met once before.

"How can I? I always do what I say, but there are too many things going on during this time, and I can't get away from it."

Faced with the other party's half-joking ridicule, Chang Haonan also chose a more relaxed way to respond,

"This is not something I just promised you when I had some free time, and the first thing I thought of was to make a phone call."

The series of disturbances caused by Chang Haonan in the past two months have basically shocked the entire Science and Technology Commission system. As the deputy chief engineer of the project, Yang Wei naturally cannot know anything about it, so he didn't really have any dissatisfaction just now, just as a Just a few jokes between acquaintances.

Yes, although the two had only met once and the conversation lasted no more than five minutes, in Yang Wei's heart, Chang Haonan had already been classified as an "acquaintance".

For a super genius like him, the depth of friendship is not mainly determined by how long they have known each other, but by seeking a spiritual and ability fit.

It just so happened that Chang Haonan was one of the few people who could meet his requirements.

Moreover, although the age difference between the two is more than ten years, it is not a generation apart, and it is easier to get along with them.

"It doesn't matter, just remember us. Now that the final assembly of the No. 01 prototype of Project has been completed, we are conducting system inspections of the entire machine and preparing for a series of ground tests before the first flight. We need you to use your expertise. When helping to delineate testing and test flight conditions.”

Obviously, the progress of Project No. 10 has been rapid during this period, and Song Wenchong, Yang Wei and even Chang Haonan's positions have been arranged.

Just wait for him to pass before starting work.

It's just that this time, I'm afraid it won't be what they want right away.

Chang Haonan directly stated his intention:

"Gong Yang, I'm afraid we have to put the matter of determining the test conditions on hold for now. I'm contacting you today because I have a new idea that can greatly improve the stability of aero engines."

"Aerodynamic instability control of aviation engines?"

Yang Wei over there was stunned for a moment after hearing Chang Haonan's answer.

"But in this regard, we have made some restrictions in the flight control..."

As a third-generation fighter jet that uses all-digital fly-by-wire, the J-10 naturally considered the safety risks caused by the failure of a single-engine aircraft engine at the beginning of its design, so it was not unprepared in this regard.

But just halfway through speaking, Yang Wei's voice gradually became quieter.

Otherwise, the person on the phone who suggested a "new idea" was Chang Haonan after all...

Although he had never worked with the latter before, Yang Wei had basically heard of the names of people, the shadows of trees, and various deeds about this young genius.

In short, what would allow such a person to make a special call to contact him would not be the traditional aviation engine instability control strategy.

But for more specific things, it is impossible to talk on the phone.

So he changed the subject:

"Well, I'm afraid it's difficult to explain the technical details clearly on the phone. How about I arrange a business trip to the capital as soon as possible to listen to your thoughts?"

This reflects the change in Chang Haonan's current status.

A year ago, in this case, the only possibility was that he flew over to find someone else. How could it be possible for his deputy chief designer to make a special trip for one of his ideas?

But now, Yang Wei made this decision almost naturally.

Of course, this is not because Chang Haonan was deliberately putting on airs. In fact, the performance of the new supercomputer assigned to him by the school is really good, and 611 does not have the same level of equipment...

All in all, it smells really good!

……

As a top engineer, Yang Wei is naturally very efficient in his work. After only two days, he arranged his work in Rongcheng and came to Beijing Airlines accompanied by several entourage.

The two met in a conference room that Tang Lintian had arranged with a high enough level of confidentiality.

"Chang Gong, nice to meet you again."

"me too."

The two briefly exchanged greetings and then got straight to the point.

"Then... let me introduce some ideas about active control of compressor instability."

Chang Haonan turned on the laptop on the table and the projector not far away.

Then a blank picture appeared on the curtain hanging on the wall——

That's right, a year later, he made a PPT using the ancient version of office.

Before rebirth, if Chang Haonan was asked to make a list of the things he hated most, then doing PPT would definitely be in the top five.

But after returning to 1997, Chang Haonan thought about it and found that nothing could replace the role of PPT in this situation.

Because with a large number of charts, handwriting will only make the workload greater, and it is not as intuitive as PPT.

"According to some of my personal understanding, at present, the internationally advanced aviation engine instability control strategy is based on the instability control line."

As Chang Haonan clicked the mouse, an engine operating curve chart appeared on the screen.

"Since the instability boundary is highly uncertain and will be affected by many factors such as flight attitude, environmental factors, aging of engine parts, etc., in order to ensure that the engine always operates within a safe range, a line is determined during the design stage of the engine control system. The fixed boundary, that is, the instability control line, takes into account the stability margin loss of the engine under the worst operating environment and can ensure that the engine is away from aerodynamic instability."

“When the pilot determines that the aircraft is at risk of aerodynamic instability, or when the sensor detects that the engine has crossed the instability control line and sends a reminder to the pilot, a short-term stability augmentation system can be manually activated to reduce fuel supply within a specified period of time. By adjusting the amount, adjusting the bleed valve, adjustable guide and nozzle area, the engine's working state can be kept away from the unstable operating line."

When this accompanying picture was released and he listened to Chang Haonan's short two-sentence summary, Yang Wei knew that his trip would not be in vain.

Because the other party was completely right about their current plan as soon as they came up.

He nodded:

"Yes, this is the instability recovery control system we are planning to apply to the J-10. Of course, we still need to cooperate with the Rulika Design Bureau that provides power to improve the aircraft's full authority digital electronic control (FADEC) system. , this should also be the most cutting-edge stability control technology currently used in foreign countries on third-and-a-half-generation fighter jets."

"If you compare it to the past, it is indeed very cutting-edge."

After hearing Yang Wei's answer, Chang Haonan smiled:

“But it’s not cutting-edge enough.”