Chapter 987 Multi-Stage Adjustable Stator Blade Matching Technology

In Chang Haonan's view, after the precedent of QC130, it should not be particularly difficult for the navy and shipbuilding industry to accept the QC300, which is also designed by 606 and also uses aeroderivative fuel.

Yan Zhongcheng's trip was most likely just for stability.

"Speak of it, Mr. Yan."

After talking about the serious matter of gas turbine selection, Chang Haonan couldn't see off the passengers right away, so he took this opportunity to chat with him about the establishment of an aeroderivative gas turbine project:

"My idea for the specific research and development work of QC300 is...if you are fine with your health, you will continue to take the lead."

Upon hearing this suggestion, Yan Zhongcheng's whole body was shaken, and a bright color flashed in his eyes.

Due to relatively complex historical factors, his efforts to challenge academicians failed last year.

Originally, he actually no longer thought much about this matter.

But QC300 is purely a project developed by the Aerospace Power Group.

If I could serve as chief designer...

It is definitely a big help to break through the academician realm.

But in an instant, he had some concerns:

"this……"

Yan Zhongcheng glanced at Chang Haonan:

"I asked the organization to take care of me. In the two years since the end of QC130, I haven't had a lot of burdens. I have been able to recuperate a lot. There must be no physical problems."

"It's just...after all, you know better about the situation of Turbofan 10, and the entire core machine was developed by you..."

In other units, leaders pick peaches halfway.

As a result, when he got here, he actually picked the leader's peach.

Although it is true that Chang Haonan has more than 100 million peaches in his hand.

But it's still weird.

At least guilty.

However, before Yan Zhongcheng finished speaking, Chang Haonan waved his hand:

"The core machine of Turbofan 10 will be used in a wide range of applications in the future. I have many things to do. It is impossible to handle every project personally. Then I will have no time to do other things."

"So... my main focus next should be on the high-bypass-ratio turbofan, and then wait until the technology of high-temperature alloys is developed to give the potential of the turbofan 10 as a fourth-generation core machine." Liberate."

"Moreover, although aviation power and ship power are both gas turbines in essence, when it comes to engineering, the difference is still quite big. In this regard, only Mr. Yan in our group has the successful experience of QC130, and you will definitely play an important role. of……"

Yan Zhongcheng didn’t really want to do it, but he was just a little bit mentally burdened. In addition, he had not directly participated in the research and development of the turbofan 10, which made him feel unsure.

Now that Chang Haonan has said so, it is impossible for him to continue to refuse.

So after hesitating for a moment, he nodded.

"Don't have too much psychological pressure."

Chang Haonan laughed when he saw this:

"I don't want to be a completely hands-off shopkeeper. I still have to be responsible for the work of grasping the boss..."

What this basically means is that he will still serve as chief engineer.

Although in most cases, the chief engineer does not interfere with the technical details of the project, this is mainly due to the different division of labor.

As the top decision-maker and person in charge of the project, if the chief engineer is willing and capable, he can of course intervene in the design work when necessary.

If a person like Chang Haonan were to be the chief engineer, he would basically play the role of a stabilizing figure and a technical backbone.

"Mr. Chang, please stop scaring me..."

Hearing this, Yan Zhongcheng finally breathed a sigh of relief:

"To be honest, other parts of the turbofan 10's aeroderivative combustion are fine. Either I can understand it, or like the combustion chamber, I can just use the test results as known items. Only the design of the high-pressure compressor, I After seeing the design plan, I am still confused..."

Although aeroderivative combustion is developed on the basis of the core aircraft engine, because the working conditions are so different, only the combustion chamber and turbine are often the only ones that change less.

Although the high-pressure compressor is also part of the "core engine", it often requires extensive modifications.

Especially after the introduction of intercooling heat recovery technology, the thermal management situation will become more complicated.

It is far from a problem that can be solved by putting a shell on the aviation engine and changing the calibration.

"There's no need to be anxious about this."

Chang Haonan pretended to be relaxed and leaned on the sofa:

"The foundation of QC300 is pretty good, so it is not difficult for the model life to last for decades. There is no need to build it overnight and use all the technologies at hand."

"The first step is to build a simple cycle gas turbine to solve the most pressing problems of users, and then gradually add other cash technologies to gradually upgrade it."

"Also, as far as the compressor part you just mentioned..."

Originally, Yan Zhongcheng had gradually relaxed at this moment, but when he heard Chang Haonan suddenly talk about technical issues, his nerves suddenly became tense again:

"Mr. Chang, wait a moment..."

He stretched out his hand to signal the latter to wait, and at the same time quickly took out the notebook and pen he carried with him from his bag:

"You continue."

Looking at the opponent's silky little combo, Chang Haonan showed a dumbfounded expression:

"Actually, I'm just providing an idea, not any specific technical guidance..."

Having said that, Yan Zhongcheng's things have already been placed on the coffee table, and it is impossible for anyone to put them away.

So, he just explained it casually, and then returned to the topic:

"You look confused because you don't know where to start. I can actually explain to you how the high-pressure compressor of the WS-10 is designed, including the margin left for upgrading to the fourth-generation engine with a thrust-to-weight ratio of 10. These parts are not difficult..."

"But if I tell you before the overall design of the QC300 is finalized, I am worried that it will interfere with your thinking."

"I suggest that you change your perspective, Mr. Yan, and throw aside all parts except the combustion chamber and turbine. Start from the characteristics of the ship-borne engine and design a set of axial compressors from scratch. This way, there will be fewer constraints and the training effect for the technical team will be stronger."

Yan Zhongcheng stopped writing thoughtfully, stroking his chin while thinking about Chang Haonan's words.

"For example, compared with aircraft engines, marine gas engines are relatively less sensitive to weight, but may need to work for a long time under low working conditions, especially if full fuel power is used in the future."

"Therefore, you can try to use adjustable stator control strategies at the design level of the 7-stage high-pressure compressor, and provide the ideal angle of attack for the rotor of the subsequent stage by changing the stator angle, and establish the inter-stage matching conditions that are suitable for the load of each working condition, so that the engine control system can automatically select the most suitable stator angle for different working conditions, improve the surge boundary and work efficiency."

"In addition, marine gas engines do not need to consider performance optimization under supersonic conditions, so there is no need to consider the problems caused by excessive boost ratio. The total pressure ratio after removing the fan can be increased to 24, or even more than 26, to improve output power and fuel economy..."

"In general, before the formal project is established, you can Consider doing some preliminary work with relatively low investment first, such as using a relatively simple one-dimensional average streamline method to establish an aerodynamic parameter calculation model, and then see if we can cooperate with the Navy and local units using other types of gas turbines to compile a model library for performance prediction. "

"In this way, when we need to build a variable-dimensional gas turbine model later, at least we don't have to start from scratch..."

"Also, from the perspective of the cycle, simply placing an intercooler between the high-pressure and low-pressure compressors has a relatively small impact on the cycle process itself, but it can significantly reduce the compression power consumption of the high-pressure compressor. If there is spare capacity, we can consider taking into account the low intake temperature when designing the high-pressure compressor..."

"..."

Although Chang Haonan said earlier that this is not a specific technical guide, for older technicians like Yan Zhongcheng, things in the direction of research and development are more important.

Therefore, the latter still picked up the pen and wrote down almost word for word what Chang Haonan said...