"Although this can solve the problem, it does expose the flaws in the design, our other engines, starting and injecting fuel at the same time, are completely fine, but when it comes to our turbofan-6, it will not work." The engine roared, the flames grew larger, and everyone looked at it with excitement.

In the midst of this howling, Mr. Zhang raised his voice and said loudly.

The design of the combustion chamber is definitely problematic!

This is professional design, Qin Feng doesn't understand it at all, but Qin Feng has seen a lot of cutting-edge materials in the aviation industry, and there are a lot of things in those materials.

As long as it is adopted by the West, it must be advanced, they have put in a lot of effort and done many experiments to make it, how can it be wrong?

"Mr. Zhang, in the West, advanced engines have adopted annular combustion chambers, I don't know what kind of combustion chamber our engine is." Qin Feng asked.

"Yes, the annular combustion chamber is a trend, but we have not carried out this research, and now we are still using the ring tube combustion chamber used in turbojet engines." Mr. Zhang finished speaking loudly and shouted to the front: "Speed up!" ”

The turbine has been spinning steadily at low speed for a minute, and it's time to continue accelerating.

Hearing Mr. Zhang's voice, an operator controlled a lever on the test bench and pushed it forward, and suddenly, Mr. Zhang shouted: "Don't be too fast!" ”

Unfortunately, it was already too late.

The deputy's hand was so fast that when he pushed the lever up, the engine let out a sharper howl and the rev increased!

At that moment, I heard the compressor in front of me suddenly puff and gasp, and then, the engine let out a rumbling, rumbling vibration.

Surge!

As a test pilot, Qin Feng could immediately judge that the engine had an asthma attack.

Engine surge is a common phenomenon, when the fighter is maneuvering, if the air intake and the engine do not match, the engine can not absorb enough airflow, then the engine's compressor can not operate normally, the turbine behind it to rotate at high speed, the front airflow needs it to slow down, it is high and low, it runs unstable, it sounds, it sounds like asthma.

Puffs of black smoke came out of the engine's tail nozzle, and finally, the roar stopped.

Everyone was embarrassed.

Qin Feng also knew that the problem with this engine was really not small.

In the past, during the test flight, there was a surge, and it was because of a fierce maneuver, and the air intake was blocked, but now? On the test bench, the airflow is abundant, and there will be no problems, which is equivalent to the pilot doing nothing else, just pushing the throttle with his hand, and the engine will surge!

If it's training, you can also push the throttle stick slowly and carefully, but what if it's in an air battle? If you have to be gentle with the throttle stick, how can you fight?

This problem is much bigger than the problem of difficult starting, which is obviously that the design of the compressor is not reasonable!

Aero engine is the crown of the entire industry, this sentence is not wrong, the turbofan-6 developed by our own side has been made in more than a year, and it has been on the test bench, and all kinds of problems will naturally be exposed.

If Qin Feng can still come up with an idea to solve the problem of starting, then this problem of compressor mismatch, Qin Feng can't solve it anyway, which requires the technology accumulation of the entire aero engine industry, not an overnight effort, let alone a layman like Qin Feng can solve it.

The engine stops this time, which takes more time, and the surge of the engine will cause problems with the blades of the compressor? The engine must be disassembled and checked piece by piece, otherwise, the next time it starts, the engine may be sprayed with parts, which is a big accident.

However, if he left now, Qin Feng felt a pity again, just like that, watching everyone busy for half the night, after the inspection, Mr. Zhang finally spoke: "Let's eat something, let's do it tomorrow." ”

The food is very simple, so late, the canteen has long been closed, use a thermos, pour some hot water, spread out a paper bag, inside are peanuts, everyone is on peanuts, drinking water, it is considered a supper.

"Wang Yang, Qin Feng, you guys should also come and eat." Mr. Zhang beckoned to everyone.

Qin Feng and the others sat next to them, grabbed a few, chewed them, and at the same time, everyone began to chat.

"It's all my fault, I was quick to do it." The operator of the "trouble" said.

"I don't blame you, our engine, it's so many problems, let's test now, it's to sort out the experimental data, find problems, solve problems, tonight's test, at least we found a way to start the engine smoothly, this is a progress." Mr. Zhang said.

Everyone nodded their heads.

"Qin Feng, thank you for pulling." Mr. Zhang said: "If you have a chance in the future, let's invite you to drink." ”

Northeast people, are the most hospitable, all like to drink, although Mr. Zhang is not from here, but living here for more than ten years, there is also this kind of coolness.

Qin Feng shook his head: "I'm just a layman, but I feel that the research and development mode of our engine is very problematic." ”

Hearing Qin Feng's words, Wang Yang became vigilant again, this kid, during the day, provoked many leaders of the 601 Institute, here, if he talks about it, it won't make everyone unhappy, right?

However, Mr. Zhang didn't care, he also sighed and said: "Yes, our domestic R&D model is very problematic, the R&D cycle of our engine is definitely longer than the R&D cycle of fighter jets, but the domestic want to pre-research, but there is no such environment, look at the road our aero engine has taken over the years, it is really impressive." ”

Mr. Zhang completely agrees, because of his expert, but the person who formulates the engine research and development plan is a layman, which is the sadness of a layman leading an insider.

It takes 30 years for an engine to mature from research and development, 10 years of pre-research and design, and then 10 years to manufacture the engine and complete the reliability verification, and then equip the troops, and after 10 years of use after the batch equipment of the troops, and continuously rectify the problems exposed in use, and finally obtain a mature engine.

The research and development of fighters will not take so many years, such as F-15 and F-16, and the research and development time of these fighters will not even take ten years, and they will be completely mature!

Therefore, Western engines are all pre-researched, as early as the sixties, for the core machine of the third generation of engines, people began to develop it, with the core machine, and then on the external fan, step by step research, step by step, but what about domestic?

There is no such environment in China! Mr. Zhang looked at Qin Feng, he already regarded Qin Feng as a confidant, no one had ever mentioned such an assertion, or rather, no one dared to mention it, but Qin Feng pointed it out.

.。 m.