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. In fact, it was already before the Spring Festival this year, but due to various unexpected events after the year Frequent appearances have made Chang Haonan unable 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 such an important matter, so after explaining his identity and purpose of coming, the call was transferred several times before a young male voice rang through the receiver again:
" Chang Gong, you are such a busy person, you have thought of contacting us.”
“If Mr. Lu hadn’t mentioned this matter when I met you in Yanliang, we would have thought that you would let us go. Pigeon."
Chang Haonan quickly recognized the identity of the person who answered the phone.
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 do what I say, but there are too many things going on during this time, and I can't get away from it."
Having half-joked in front of the other party Chang Haonan also chose a relatively relaxed way to respond to the ridicule,
“It’s not like the first thing I thought of when I had some free time was to promise you things, so I made a quick call.”< br>
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 it was not really true just now. What dissatisfaction there is is 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 does not mainly depend on how long they have known each other, but on seeking a compatibility in spirit and ability.
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 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. Now that the final assembly of the No. 01 prototype of Project 10 has been completed, we are conducting a full system inspection and preparing for a series of ground tests before the first flight. This is the time when you need to use your expertise to help define 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.
Only this time, I’m afraid they won’t be able to get what they want right away.
Chang Haonan directly stated the purpose of his visit:
"Gong Yang, I'm afraid we have to put the matter of determining the test conditions on hold for a while. I contacted you today because I have a new idea. It can greatly improve the stability of aircraft 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 are already in the flight control Some restrictions have been made..."
As a third-generation fighter jet using all-digital fly-by-wire, the J-10 naturally considered the safety hazards caused by the failure of a single-engine aircraft engine at the beginning of its design. So we are not unprepared in this regard.
But just halfway through speaking, Yang Wei's voice gradually became quieter.
Without it, the person on the phone who suggested a "new idea" was, after all, Chang Haonan...
Although I have never worked with the latter before, the name of a person and the shadow of a tree have something to do with this person. Yang Wei had basically heard of all the deeds of young geniuses.
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 topic:
"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 ideas?"
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 trying to put on airs. In fact, the performance of the new supercomputer assigned to him by the school was really good, and 611 School did 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 Chengdu, and among several Accompanied by his entourage, he arrived at Beijing Airlines.
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 words and then went directly to the topic.
"Then... let me introduce some ideas about active control of compressor instability."
Chang Haonan opened the laptop on the table and the projector not far away. instrument.
Then a blank screen 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 my personal understanding, at present, the internationally advanced aero-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 works within the safe range, the engine control A fixed boundary is determined during the system design stage, which is the instability control line. This 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. ”
< br>“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 the stability within a specified period of time. The fuel supply volume, adjustment of the bleed valve, adjustable guide and nozzle area can keep the engine's working condition away from the unstable operating line."
When this picture was released, Chang Haonan heard it again. After summarizing in just two sentences, 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 Rulica Design Bureau that provides power to improve it. The aircraft's full authority digital electronic control (FADEC) system should be the most cutting-edge stability control technology currently used in third- and semi-generation foreign fighters. "
"If we compare the situation in the past, it has indeed been achieved. Very cutting-edge.”
After hearing Yang Wei’s answer, Chang Haonan smiled:
“But it’s not cutting-edge enough”
(End of this chapter)