Chapter 91 We are all under your command! (Additional update for fhtvbn, the helmsman)
Yang Fenghao looked at Chang Haonan, who had been bowing his head in thought just now.
The latter has been looking at the raw data retrieved from the No. 01 verification machine since he was on the plane.
He really wanted to say that in fact, the turbojet 14 should not only face design issues.
Because he did a simple calculation last night, and compared it with the flight record data just now, he found that although the compressor structure of the Turbojet 14 has heavy traces of patchwork, the designer obviously also knew this. Therefore, sufficient surge margin was left at the beginning.
On the general characteristic curve of a compressor, the distance between the common working line and the surge boundary line is the surge margin of the compressor, which reflects the stable operating range of the compressor.
Perhaps due to the choice of a more conservative common working line, the Turbojet 14 is not bad in this regard.
However, when the No. 01 prototype was rapidly recovering fuel, the degree of instability in its working state still exceeded the original design threshold, thus inducing surge.
Of course, from the perspective of surge control, as long as the surge margin is large enough, the surge phenomenon can be avoided after all.
It’s just that the surge margin is like the human body’s immunity, and the reason that causes the engine’s extremely unstable working condition that no one knows yet is equivalent to a pathogen.
Of course, improving immunity can prevent illness to a certain extent, but it is by no means a permanent solution. If the pathogen cannot be eliminated, the risk will still exist.
And this solution to the problem is not transparent enough.
But before he could figure it out, he heard Yang Fenghata’s question:
“Comrade Xiao Chang, do you have any opinions on the improvement of the Turbojet 14?”< br>
Chang Haonan did not expect that he would be addressed so bluntly. It seemed that Yan Zhongcheng was indeed quite anxious.
So he had to temporarily put aside further matters and solve the burning problems first.
When a person has a fever of 43°C and is about to have too much milk, the most important thing is to lower the temperature first, and the root cause can be dealt with later.
"Well, Mr. Du should have told you before that I have indeed studied the control problem of flow separation inside the impeller machinery."
"I have read Professor Wang Zhongqi of Bingcheng University of Technology According to research, the circumferential curvature of the blade can well control the secondary flow in the blade channel, thereby controlling the flow separation, so I am planning to start from this aspect, but... some more sufficient experimental data is needed.”
Everyone who was sitting around a small conference table just now could not sit still after hearing Chang Haonan's attitude. They stood up almost at the same time.
"What is the specific content of the experiment, and... what preparations do we need?"
If someone else had said that sentence, it would not have caused such a reaction. After all, the experiment cycle related to the compressor is long. Costs are high, and “adequate” data generally means taking months or even years to obtain.
But Chang Haonan is different.
He has created so many miracles in the past two months that everyone has almost forgotten about the experimental cycle with him.
The sudden appearance of several people startled Chang Haonan, who had one hand on the table. After a brief hesitation, he had no choice but to stand up.
So there was a strange scene in the small conference room where a group of people were standing for a meeting.
“The current research on the impact mechanism of swept blades on improving compressor performance is relatively qualitative, and there are differences in the flow conditions of transonic and supersonic compressors, so I need to use the original data of turbojet 14 Based on the design, the stacking rules of curved and swept blades were studied respectively. ”
“After obtaining the regular results, the top forward sweep modification and the bottom forward curve modification were carried out to change the sweep height and height. Different sweep and bend design solutions are obtained for the sweep angle, bending height and bending angle, and then the optimal comprehensive improvement results are selected through numerical simulation and applied to the blades of the high-pressure compressor. ”
In fact, this idea is. It is similar to how Chang Haonan made the J-7 improved design plan when he first traveled across time. He first looked for the rules, then made a plan based on the rules, and finally found the optimization in the plan.
It’s just that this time, both the workload and the importance of the work are far greater than before. So he needs help from more resources.
“The first step is to study the rules, and we can speed up the progress through numerical simulation and experiments simultaneously. The third step is the same, but there is no shortcut in the middle step of coming up with the design plan, and it requires a lot of time. A large amount of manpower is required, and the testing process also requires the production of physical objects. In this regard, comrades from the 606 Institute and the 410 Factory need to work together.”
In fact, it is to let a large group of engineers complete the work previously done. Work completed by Zhou Shuwan and Zhang Man.
Yang Fenghao looked again at Yan Zhongcheng on the other side, and Zhong Shihong, the technical director of Factory 410.
“If you follow Comrade Xiao Chang’s plan, you will need to mobilize some people from your respective units to accept his command.”
Yan Zhongcheng and Zhong Shihong looked at each other.
The two of them have been working in this field for many years, and naturally know that the division of labor between factories and offices is not an easy task to complete, not to mention that Chang Haonan probably has no experience in this field at all.
Fortunately, the engineers at Institute 606 have basically heard of Chang Haonan.
But the skilled workers in Factory 410 are from a completely different system, and they may not necessarily know who Chang Haonan is.
"Mr. Yang, if we just transfer people to Comrade Xiao Chang, I'm afraid the effect will not be very good."
So after a short period of thinking, Zhong Shihong first spoke out about his concerns.
The main reason is that he himself was parachuted into the 410 Factory from outside. Many management problems were experienced personally.
A place like a factory is a bit like an army. Workers and soldiers may not necessarily have a high level of education, but they have their own internal chain of contempt.
Fortunately, Zhong Shihong studied welding, and finally relied on a few unique skills to gradually win over the entire factory.
But looking at Chang Haonan's fair appearance, he probably didn't look like he could do such crafts as turning, milling, grinding, boring, forging and welding.
"What Minister Zhong means..."
"I think that in terms of production and manufacturing, it is better for you to take the lead in setting up a research team directly, with you as the team leader and Comrade Xiao Chang as the deputy team leader. , Mr. Yan and I are members of the team, directly under the command of Comrade Xiao Chang!"
"This..."
Rao Chang Haonan was also shocked by this proposal.
He really wanted to make a breakthrough in management ability, but this breakthrough seemed a bit too big.
From being in charge of Lin Shikuan's group of six people, to being in charge of the 606 Institute and the 410 Factory?
Although it is only temporary.
“I think this method is worth a try.”
Unexpectedly, Yan Zhongcheng next to him also nodded: “Comrade Chang Haonan is very knowledgeable in the numerical simulation of separated flows. I have been throwing away some of my stuff for more than ten years, and I just want to pick it up.”
“I...”
After hearing the two people's statements, Yang Fenghao was naturally very happy. He didn't even ask Chang Haonan for his opinion. Instead, he came over and patted him on the shoulder directly:
"Then my These two old guys will all be under your command from now on!"
(End of this chapter)