bonanza

Chapter 879 Shockwave Wind Tunnel

For Yang Dongsheng's two suggestions, the 624 Institute raised their hands to welcome them.

The ancestors have long said that if a worker wants to do a good job, he must first sharpen his tools!
As long as you are a man, who doesn't want his dick to be thicker and bigger?

The meaning of hiding in the mountains has long since disappeared.

In front of advanced precision-guided weapons, there is basically no difference between hiding in the mountains and staying in the city.

In the past, they suffered from lack of funds, but now they have a big funder who is willing to cooperate with them, which is what they wish for.

But where to move?They still hesitated.

Although the medical and educational conditions in big cities are better, they have to face high housing prices and high consumption!
In a meeting room that was barely usable, everyone couldn't come up with a result for a long time.

"Ahem!" Suddenly someone coughed, "Does Mr. Yang have any suggestions for where to move the new test bench?"

Only then did everyone realize that the key to this matter depends on Yang Dongsheng.

After all, the money is in their hands.

No matter how good their discussions are, it depends on whether they are willing or not.

Yang Dongsheng thought for a while and said, "I just listened to everyone's discussion. I think we might as well take two steps. The first step is to move out of the mountainous area and build a high-altitude test platform in Mianzhou. After all, Mianzhou is the foundation of our institute. It’s also easier to get the land, let’s build the new high-altitude test platform first!”

Judging from the discussion just now, these people actually want to go to big cities.

Mianzhou is too small, even worse than Yang Dongsheng's hometown, Guazhou. Such a place cannot attract talents.

Everyone has the right to pursue better living conditions!

Yang Dongsheng is also more inclined to move the high-altitude test bench to Shanghai, Huajing or Rongcheng.

Only a better working environment can attract better talents and produce more and higher-quality results.

But it can be seen that some old comrades have resistance to moving to a big city.

This is also understandable, after all, they have been in Mianzhou for most of their lives, and they have already taken root here.

I am reluctant to move away all at once.

I was also worried about moving to a big city and not getting used to it.

These old comrades still occupy a considerable right to speak in the 624 Office.

"The second step is to move to a big city!" Yang Dongsheng smiled and continued, "The housing prices and consumption in big cities are indeed high, but this should not be an obstacle for us to move to big cities. There are two reasons. First, Our test bench must be built in the suburbs. The housing prices and consumption levels in the suburbs are much cheaper than those in the city center. Second, if the housing prices are high and the consumption is high, then the treatment should be improved. You are all high-end talents, you should With high income!"

After Yang Dongsheng finished speaking, there was a burst of warm applause at the scene.

This is so exhilarating!

Look at this conference room, which one is not graduated from a prestigious school, which one is not a high degree?

There is only a master's degree here, and you are too embarrassed to say hello to others——Yang Dongsheng felt a blush.

The proud sons of heaven, after graduation, came to this poor mountain valley, and their wages were not as high as those who sold roasted sweet potatoes.

Fortunately, they are XX units, and they cannot talk about unit matters with them.

Otherwise, when I go home during the Chinese New Year, relatives and friends will not know how to tell them when they ask.

"Of course! If you want to go directly to Huajing, Shanghai, or Rongcheng, Nanjiang if you want to do it in one step, I also support it! I respect everyone's opinions!" Yang Dongsheng finally said.

After Yang Dongsheng finished speaking, there was another applause from all around.

Even the leaders in the institute couldn't stop nodding.

The situation here is what Yang Dongsheng has seen before in Northwest Coal Chemical Industry.

Every time I see this situation, I can't help but sigh.

These people had such a hard time in the past!
In this era, if you want to develop high technology, you have to be willing to invest.

To engage in low investment and high output is either a dream or a liar!

In my previous life, I didn't even have to think about claiming that I wanted to make my own chips—the ultimate goal was to go to the XX board to collect money.

As a result, when everyone saw the funds they were going to invest, they ridiculed.

Without even thinking about it, he withdrew his listing application overnight, once again bringing on himself humiliation.

The 624 Institute is also the research and development unit of the next-generation small bypass ratio aero-engine, and Dongsheng Heavy Industry is still in competition with them.

Dongsheng Heavy Industry Changan Engine Branch had some technical exchanges with the 624 Institute, and Yang Dongsheng discovered that many things were not what he thought before.

For example, Yang Dongsheng has always been puzzled about the domestic small bypass ratio aeroengine, and the problem of counter-rotation between the high-pressure turbine and the low-pressure turbine on the turbofan-10.

He used to think that it was caused by poor communication in the design, and he went his own way, but now he discovered that it was designed like this from the beginning.

The reason is that the high-speed rotation of the engine rotor will generate a huge gyroscopic moment, which is not conducive to the fighter to adjust the nose pointing in time when the fighter is engaged in close combat.

The 4S capabilities that the fourth-generation fighter jets need to possess, one of which is super-maneuverability.

Even in close combat, the third-generation fighter jets represented by F-15 and Su-27 must be hanged.

So Pratt & Whitney, which manufactures the F-119 engine, designed the high-pressure turbine and the low-pressure turbine to counter-rotate to offset part of the gyroscopic moment.

Regarding the situation of the F-119 engine, 624 has more detailed information than Dongsheng Group.

The counter-rotation on the turbofan-10 is just for the accumulation of technology for the next generation of aero-engines.

In addition to the counter-rotating design of the high-pressure turbine and the low-pressure turbine, the 624 Institute also designed a 3-stage fan and a 6-stage high-pressure compressor for the next-generation aero-engine... everything is designed against the standard F-119.

This reason is so strong that it is impossible to refute it. After all, we have been crossing the river by groping the ass of Yingjiang for many years.

Yang Dongsheng looked at the team leader of Dongsheng Heavy Industry Changan Engine Branch who presided over the "Haihe" engine project.

"Can we do this?" Yang Dongsheng asked.

The team leader shook his head, "The speeds of the high-pressure turbine and the low-pressure turbine are tens of thousands of revolutions per minute. With our current technology, if we want the high-pressure turbine and the low-pressure turbine to rotate in opposite directions, we must first greatly reduce the speed of the high-pressure turbine and the low-pressure turbine. In this case, if the number of stages of compressors and turbines is not increased, the thrust of the engine must be greatly lost. Secondly, the price of shortened engine life must be paid.”

Yang Dongsheng nodded. In his previous life until his rebirth, there was no battle between stealth fighters.

Even if there is an air battle between stealth fighters in the future, it should be the stealth fighters commanding the drones to hunt and kill opponents.

Instead of rushing up by yourself!

Yang Dongsheng didn't know how the Americans realized this technology and at the same time allowed the life of the F-119 engine to far exceed that of the previous generation engine.

But they really don't have this technical strength at present.

And Yang Dongsheng wasn't going to do that either.

He also plans to use the core engine of this small bypass ratio aeroengine as the basis to develop a high bypass ratio aeroengine as the power of large civil aircraft.

Perhaps it is precisely because of the counter-rotating relationship between the high-pressure turbine and the low-pressure turbine that Pratt & Whitney did not develop a high bypass ratio engine based on the F-119 engine.

In this world, the simpler the machine, the more durable and the lower the maintenance cost.

While Yang Dongsheng was weighing this issue in his mind, the team leader of Dongsheng Heavy Industry Changan Engine Branch who presided over the "Haihe" engine project and the people from the 624 Institute suddenly quarreled over this issue.

The team leader patted the table and said, "Even if it is really necessary in the future, can't we make major changes to the engine after we have made a breakthrough in technology? Even in the future, we can specially equip a batch of high-pressure turbines and low-pressure turbines that rotate in opposite directions without dropping the speed. But fighter jets with significantly reduced engine life are designed to dogfight the F-22."

On the opposite side, a person who seemed to be about the same age as the group leader also patted the table and said, "Our country's military expenditure is not as good as human beings, so why waste military expenditure and make a special machine for dog fighting? You are learning from the Soviet Union. The idea of ​​the MiG-25 interceptor!"

"That's better than being stuck here because of the problem of counter-rotation between the high-pressure turbine and the low-pressure turbine. At this time, in order to manufacture a seemingly perfect engine, and delay the development of the entire engine, this is putting the cart before the horse. What the country urgently needs now is A high-performance engine with a thrust-to-weight ratio of 10 and good reliability, not an engine that can be on par with the F-119 in all aspects."

……

Yang Dongsheng said in his heart, most people who engage in scientific research are stubborn, right?Or maybe the two had enmity.

"Listen to me first!" Yang Dongsheng was really afraid that the two of them would continue to quarrel, so he knocked over the roof. The house had just been through an earthquake. "I think it's good! Our country has always walked on two legs. Now let's see who can come up with the product first. If you don't mind, how about we complement each other in technology?"

After the talks, the two sides signed a series of cooperation agreements.

The 624 Institute will provide technical support to Dongsheng Heavy Industry and assist them in the design of subsystems such as high-pressure compressors and casings.

Similarly, if the 624 Institute finally wins, Dongsheng Heavy Industry will also provide them with a series of sub-components such as high-pressure turbine blades and combustion chamber nozzles.

As a backup solution for Dongsheng Heavy Industry's small bypass ratio aero-engine.

Dongsheng Group will invest 2 million yuan to repair and upgrade the current high-altitude test platform.

This investment can offset the cost of high-altitude test runs in the future.

In addition, the two parties will also cooperate to build a next-generation high-altitude test platform.

Yang Dongsheng then met with people from the 29th Wind Tunnel Base.

In 2006, the wind tunnel base proposed the goal of building a high-enthalpy shock tunnel.

After two years of demonstration, they abandoned the traditional free piston drive technology route and adopted the reverse detonation drive method.

It can simulate the airflow conditions when flying at an altitude of 25 to 50 kilometers and flying at Mach 5 to 9.

Project designation JF-12.

In addition, the wind tunnel base has also designed a higher-level wind tunnel that can reproduce the altitude of 40 to 100 kilometers, the speed of Mach 30, and is driven by positive detonation.

(End of this chapter)