Chapter 91 We are all under your command! (Added for helmsman fhtvbn

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 knew this, so he still left it at the beginning. Sufficient surge margin.

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 occurrence of surge can be avoided.

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 it’s not transparent enough to solve the problem.

But before he could figure it out, he heard Yang Fenghata's question:

"Comrade Xiao Chang, do you have any opinions on the improvements of the turbojet 14?"

Chang Haonan didn't 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 degrees Celsius 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, Teacher Du should have told you before that I have indeed studied the control problem of flow separation inside the impeller machinery."

"I have read the research by Professor Wang Zhongqi of Bingcheng University of Technology. The circumferential bending of the blades 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 details are needed. Sufficient experimental data will do."

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 are the specific contents 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 experimental cycle related to compressors is long and costly. The term "sufficient" data generally means that it will take several months or even years. It takes time to gain.

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.

Chang Haonan, who was leaning on the table with one hand, was startled by the sudden group of people. 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 curved 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 design of the turbojet 14 as a basis to conduct research on the curved blades. The accumulation rules of blades and swept blades are studied separately."

“After obtaining regular results, carry out top forward sweep modification and bottom forward bend modification, change the sweep height and sweep angle, bend height and bend angle to obtain different sweep and bend design solutions, and then select them through numerical simulation. The best comprehensive improvement results are applied to the blades of high-pressure compressors.”

In fact, this idea is similar to Chang Haonan's design plan for the improved J-7 when he first traveled across time. They first looked for the rules, then made plans based on the rules, and finally found optimization in the plans.

But 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 a design plan. It requires a lot of manpower and testing. The process also requires the production of physical objects, and in this regard, comrades from the 606 Institute and the 410 Factory need to work together."

In fact, a large group of engineers were asked to complete the work previously 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 we proceed according to 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, so they naturally know that the division of labor between factories and offices is not an easy task to accomplish, not to mention that Chang Haonan probably has no experience in this area at all.

Fortunately for the engineers at Institute 606, most of them have already heard of Chang Haonan.

But the skilled workers in Factory 410 are from a completely different system, and they may not know who Chang Haonan is.

"Mr. Yang, if you just transfer people to Comrade Xiao Chang, I'm afraid the effect won't 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, and many management problems were experienced personally.

A place like a factory is a bit like an army. Workers, like soldiers, may not necessarily have a high level of education, but they have their own internal chain of contempt.

Fortunately, Zhong Shihong had a background in welding, and finally relied on a few unique skills to gradually win over the entire factory.

But looking at Chang Haonan's fair face, he probably didn't look like he could do such crafts as turning, milling, grinding, boring, forging and welding.

"What Minister Zhong means is..."

"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, Comrade Xiao Chang as the deputy team leader, and Mr. Yan and I as team members, directly under the command of Comrade Xiao Chang !”

"This……"

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 6 Institute and the 606 Factory?

Although only temporarily.

"I think this method is worth a try."

Unexpectedly, Yan Zhongcheng next to him also nodded: "Comrade Chang Haonan is very knowledgeable in numerical simulation of separated flows. I have put aside this aspect 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 these two old friends of mine will all be under your command from now on!"