The Military-industrial Scientific Research System of the Academic Master Chapter 308

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 frequent accidents after the new year, Chang Haonan has never been able to fulfill his promise.

Furthermore, since Lu Yuying is not actually involved in Project No. 10, 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 Project No. 10.

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 number of the 611 institute.

Of course, it was impossible for the operator on the other side to decide on such an important matter. Therefore, after explaining his identity and purpose of coming, the call was transferred several times before a young male voice sounded on 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, we would have thought that you would let us go.”

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

 Deputy chief designer of Project No. 10, Yang Wei.

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

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

Facing 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.

That's right, although the two had only met once and the conversation lasted less 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 the length of time they have known each other, but by seeking a compatibility in spirit and ability.

Coincidentally, Chang Haonan is one of the few people who can meet his requirements.

Furthermore, although the age difference between the two is more than ten years, it is not to the extent of being separated by a generation, and it is easier to get along with each other.

"It doesn't matter, just remember us. The final assembly of the No. 01 prototype of Project 10 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 define testing and test flight conditions.”

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

Just wait for him to pass before starting work.

 It's just that this time, I'm afraid they won't be able to do 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 a while. I'm contacting you today because I have a new idea that can greatly improve the stability of aeroengines.”

“Aerodynamic instability control of aircraft 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 only halfway through speaking, Yang Wei's voice gradually became quieter.

 Nothing else, the person on the phone who suggested a "new idea" was Chang Haonan after all...

Even though 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 phone call to contact me 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 hard to explain the technical details over the phone. I'll arrange a business trip to the capital as soon as possible to listen to your thoughts. How about that?”

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

 A year ago, in this case, the only possibility was that he would fly 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 meant to put on airs. In fact, the performance of the new supercomputer assigned to him by the school is really good, and 611 schools do not have the same level of equipment...

 In short, 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 exchanged a few brief greetings and then got straight to the point.

“Then...let me introduce some relevant ideas about active control of compressor instability.”

Chang Haonan opened 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 require more work, and it is not as intuitive as PPT.

“According to 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 rule 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 exhaust valve, adjustable guide and nozzle area, the engine's working condition can be kept away from the unstable operating line.”

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

 Because the other party got their current plan right as soon as they came up.

 He nodded:

"Yes, this is the instability recovery control system we plan 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 third-generation fighter jets abroad.”

“If you compare the situation in the past, it is indeed very cutting-edge.”

After hearing Yang Wei's answer, Chang Haonan showed a smile:

 “But, it's not cutting-edge enough.”

 (End of this chapter)

Chapter end