Chapter 1330 Dual-Mode Ramjet Engine

For Chang Haonan's new ideas, Xing Muchun and others did not feel particularly shocked.

I just think this concept is a bit strange.

In the entire hypersonic weapon item, except for the double-tapered body verification bombs that were initially used for technical verification and accumulation experience, they were all used with relatively low technical difficulty-gliding schemes priority Relatively behind.

At present, the theoretical research and wind tunnel test of the kiss cuttering ripple used by the flying body, and the power system is still in a independent development stage -

Of course, it is only independent compared to the entire project team.

After all, in the final analysis, the Aviation Power Group will still undertake the specific development task and can not escape the big hand of Academician.

But until now, there is indeed room for changes.

Moreover, although the rest of the main responsible persons of the hypersonic project are born in aerospace, aerospace will not be separated after all.

Not to mention anything else, at least the aviation power group is investigating a fifth -generation aviation engine in a cycle, and most people have heard of it.

Therefore, the two things are related to the reason:

"Pouring the engine ... also a variable cycle?"

Xing Muchun's overall design of the Rockets is a bit unfamiliar with the technology tree of inhalation power, and it is a less accurate description.

Fortunately, it is not much different.

"Your understanding should be right, but the concept of the stamping engine has no gas cycle and internal and external culverts, so it should not be called a variable cycle."

Chang Haonan smiled and corrected:

"Of course, if you can combine the stamping engine with the traditional turbine jet engine in the future, then say another ..."

Regarding the half sentences, everyone chose to ignore it for the time being.

As for the age of most people here, the current project is almost the battle of their career, and it can be done in the front line to end.

No matter how long, even if they are willing to participate, the probability is not as the current identity.

"How should it be named?"

Xing Muchun is also serious at this moment.

Chang Haonan did not give an answer immediately, but just bowed his head for a moment.

After seeing the work circulation curve that had been verified just now, the light appeared, and there was no complete idea at this moment.

"The most obvious difference between the super -combustion stamping engine and the sub -burning stamping engine is the thermal working process in the combustion room ... so it can be called a dual -modal stamping engine, which can be based on the flight status. Switch freely ... "

Everyone didn't say anything, but nodded in recognition.

"But Academician ..."

After some chat, Jiang Zonglin took the lead in cutting back the topic:

"After all, the variable cycle of jet engine requires only an extra culvert, which is within the scope of the acceptable range of engineering design ... This double-modal stamping engine is designed by the combustion room, including the compression-isolation section and the inner nozzle. If you want to change, you can’t install two burning rooms in it? "

One of the biggest advantages of stamping engine is the simple structure, without many active components, and has a good tolerance for extreme flight conditions.

If a combustion chamber is plugged in more compatibility, it is better to install two engines directly on the aircraft.

Chang Haonan's face showed a slightly funny smile:

"Originally, this was really a problem that could not be solved ... But thanks to the failure of the Americans this failure, it gave me a lot of inspiration."

He said that he quickly turned the report just to one of the pages, and then pulled a few white paper from the printer next to him.

Seeing this, the remaining people quickly surrounded.

"The two combustion rooms for the engine design are definitely not lost to the engine, but we can divide the same combustion room in thermalism through the distribution and boundary layers of different robbing skewers and the same combustion cone. two……"

Chang Haonan introduced a schematic diagram while introducing it, but half of the time, the pen Feng suddenly stagnated:

"No, you have to divide three working status."

"First of all, the mode of pure sub -burning. In this case, the front of the burning area in the streaming field is dominated by the front of the burning area. Have two geometric larylasses, provide pressure provided by the positive wave system provided by the transplants. "

"Then the transitional modal, the swarms in front of the combustion area move to the entrance of the burning room, the exit of the rotten string is the ultrasonic speed, the boundary layer is separated, but it is still in the work cycle of sub -burning stamping."

Having said that, he turned around and pointed to the test conclusion of the test of the X51A flowway structure.

"At present, Americans's understanding of the thermal cycle of stamping engine is highly likely to stay on the surface. In order to improve the efficiency of work efficiency, it has chosen a relatively high starting speed, but it is not enough to ignore the transition section. The wall is more difficult to cross, and it is forced to stay in the sub -burning mode for a long time, stuck in this link. "

"And the purpose of our development dual -modal stamping engine is to reduce the pressure of rocket pushing segments and improve the flexibility of flight conditions. Below, otherwise, as the effect of the gas dissolution is becoming more and more obvious, chemistry can turn difficulty to transform it into effective work, and it is likely to repeat their mistakes ... "

"..."

In addition to Chang Haonan himself, Jiang Zonglin and Chen Hong are the most in -depth research on high -temperature gas dynamics and the first to react.

"As long as it crosses this stage, the airway can penetrate the entire isolation section/combustion room, so that the fluid in the burning room can reach the supersonic speed, and the super -burning stamping mode is completely entered ..."

"That's it."

Chang Haonan nodded:

"But there are some other details to solve ... such as weakening the pressure distribution of the geometric bilateral tract structure on the pressure distribution of the hyper -stammered mode, and how to transition from the transplants obliquely to the front of the aircraft At the current stage, the issues that should be paid first, and will not delay the progress of the development of gliding. "

"Machim number below 5.0, can you also enter the state of super -burning stamping work?"

Someone soon raised concerns.

"Hmm ... the threshold of Mach Matto 5.0 as the hypersonic speed is artificially defined. Actually, this number is related to many variables. The stream of the ropper string can ensure the normal work of the over -stamping mode. "

Chang Haonan explained:

"Of course, this needs to calculate the heat work process and corresponding performance of the combustion chamber under the limit of the export area of ​​the isolation section before designing the limit.

"..."

"In short, it is a job that requires a lot of wind tunnels to complete."

He knocked on the desktop gently and entered the summary:

"Ren Zhengtao far away, comrades ..."

Nympho

After simply arranging the subsequent testing work, Chang Haonan quickly sorted out the test and analysis results of the X51A, and then quickly rushed to the Air Force Command by car.

"Why are there so much?"

There is no mistake, one, one, one, one, one, one, one, one 619, one book, one, one, one, one, one, one, a book!

It is almost a month before the return of the Long March 9 to the air. When Zheng Liangqun received the phone just now, he thought that Chang Haonan just told him some preliminary judgments, and even today's schedule did not change it specifically.

As a result, after opening the file bag, I found that a thick conclusion report was contained in it.

"I remember you seem to have said before, maybe there is no way to get particularly rich conclusions?"

At a certain moment, he felt that he seemed to have a problem with the understanding of the word "rich".

"Mainly good luck, the reduction of the compressed isolation section is very high, and some useful conclusions have also been analyzed ..."

Chang Hao replied in the south.

Zheng Liangqun sat straight and came to respect .gif.

"You wait ..."

Then picked up the phone, and soon called a captain:

"Let the Deputy Chief of Staff Lu go to me for the meeting tonight, and say that there is an emergency here.

Such a decisive choice made Chang Haonan a bit difficult to stretch:

"This ... is not good."

After the young officer left, he turned to look at the door and said:

"The report is on you anyway, but I will not run away my own long legs ..."

Zheng Liangqun waved his hand:

"A business that is in contact with local units. It is the political department who sings the protagonist.

Then put attention to the report in your hand.

Because it was written to the leader, when Chang Haonan retained the data analysis, he did not forget to write a small section as much as possible after each part.

Zheng Liangqun naturally did not have any obstacles.

"That is ..."

About half an hour later, he finally raised his head again:

"Do you think that the current problem of Americans is not just immature or defects in some details, but a problem at the route level?"

Chang Haonan has found tea from Zheng Liangqun's office in a light car and soaked himself with a drink:

"More fundamental."

He put down the tea cup in his hand and replied:

"According to the current situation, I don't think it's X51A. Even if they go to the gliding style, they will encounter a big problem ..."

Zheng Liangqun's face showed a surprise instantly, but quickly converged:

"Is it possible to solve it by Fei Dai test?"

"It's difficult."

Chang Haonan shakes his head:

"The premise of the flying test is that the cause of the fault is single, and it can determine the location of the problem, but if it is just a simple model selection error, then they should be realized during the ground testing stage that it will not let the aircraft take such a big problem Heaven, so there must be a lot of loopholes in the engineering management stage ... In this way, it is estimated that you can’t understand the analysis. "

"Actually I can't even think about it now, how did the X43A success in that year ..."