Now the turbine blade discs of the engine have been painstakingly pursuing their shape, how their shapes are more scientific, more in line with the principle of fluid science, and slowly changing to pay more attention or find related materials.

The materials used in turbine blade discs have long been transitioned from alloy steel to nickel-based and titanium-based single crystal alloy materials, and now they are developing towards composite and ceramic-based materials.

Originally, Huaguo was still weak in terms of materials, not only did not use a large number of carbon fiber composite substrates, but also did not have carbon fiber composite substrates, and even if they did, they did not dare to use them in large quantities, because the quality of domestic carbon fiber composite substrates was not very good, and they did not feel at ease to use them.

Since Peng Huading participated in the development of the engine, after Peng Huading's review, they finally used domestic carbon fiber composite substrates on the engine. But they still have relatives, so they did not rush to test the engine after assembling the engine, but waited for Peng Huading's arrival.

Peng Huading does not want to be too prominent in terms of materials, and compared to electromechanical technology, his material knowledge is indeed lacking, so he did not build how to produce the world's best carbon fiber composite substrate in the relevant departments, but put forward some improvement measures in the existing domestic carbon fiber composite substrate, which has some help to improve the domestic carbon fiber composite substrate, but it is far from enough to go against the sky, and the carbon fiber composite substrate produced is still not as good as the world's most advanced carbon fiber composite substrate.

However, he is still sure of this improved domestic carbon fiber composite substrate, and knows that the domestic carbon fiber composite substrate can be used in the engine. It can basically meet the requirements of the engine.

In fact, for the sake of safety, although Peng Huading did not propose a better improvement to the domestic carbon fiber composite substrate, and did not say the formula and processing technology against the sky, he proposed a relevant proposal for the structure of the engine, that is, to adapt the mechanism of the engine to the domestic carbon fiber composite substrate.

It seems ridiculous and seems a bit of a reversal. Because it stands to reason that the material should be suitable for the engine, what kind of material is needed for the engine, the material producer should strive to produce what material, and if he can't produce it himself, he will go abroad to buy it. How can the engine be changed because the material is not secure?

But. Peng Huading's specialty is in design, and he is far beyond the experts of this era in terms of institutional design. For him, modifying the engine structure is as easy as drinking water, if necessary. If there is time. He can even design products that are several grades higher than American and Russian aircraft engines.

Now prepare the aero engine for test flight. Peng Huading adopted some new design technologies, changing the longitudinal pressurization commonly used in the current engine to horizontal and longitudinal comprehensive pressurization, that is, the two-stage pressurization chamber is often used at present. The air coming in from the air inlet is pressurized again and again by the guò compressor, and then sent into the combustion chamber for combustion, and the high temperature and high pressure air flow drives the turbine blades to work, thus generating thrust.

The engine designed by Peng Huading not only has two stages of supercharging, but also divides the second stage of supercharging along the center of the turbine blades. The radius of the turbine blade root is small, the linear speed is slow, and the high-heat and high-pressure gas does little work here, and the gas demand is small, so there is no need for rapid gas supply. However, the radius of the top area of the turbine blade is large and the linear speed is fast, where the high heat and high pressure gas does a lot of work, and the gas demand is large, and the rapid gas supply can eliminate unnecessary turbulence.

The zonal air supply to the turbine blades is conducive to improving the efficiency of the engine and the thrust of the engine, but the disadvantage is that the processing of parts is difficult and the accuracy requirements are higher.

And Peng Huading's advantage is precisely the strongest in the processing ability, the precision processing of parts is easy, and the parts that are difficult to process are available in his repair system.

As soon as Peng Huading got off the plane, Deng Guohong greeted him with a few people.

"Chief Engineer Peng, it's hard work." Deng Guohong stretched out his hand to hold Peng Huading's hand and asked with a smile, "How is life in the submarine, are you used to it?" ”

Peng Huading smiled and said, "It's okay." It's not that you don't know. ”

Deng Guohong was able to say this in front of others and openly say about the nuclear submarine, Peng Huading knew that the people behind him were all very big, and at least he had the right to know about this kind of high-density thing.

Sure enough, when Deng Guohong introduced, he understood that in addition to the people he knew before, everyone else was also a big dealer, such as the chief engineer or deputy chief engineer of J-10, J-15, J-20 and other fighter jets, even the generals who came with him were also major generals or above.

One of the chief engineers smiled and shook Peng Huading's hand and said, "Chief Engineer Peng, we have been waiting for you for a long time. We are anxious, and we have been looking forward to this day for a long time. ”

For Peng Huading's title, everyone doesn't know how to call him well, if it were anyone else, he would call him Xiao Peng when he was young, but this guy is a technical cow, everyone else has to learn knowledge from him, and this young man can be called their teacher in a certain way, who is embarrassed to call him Xiao Peng?

Peng Huading did not pretentiously ask others to call him Xiao Peng, but said with a smile: "I'm really embarrassed." Actually, you just test the car and I only did part of the work, and you did most of the work. When you came to greet me, I was a little embarrassed. ”

A general next to him laughed and said, "Chief Engineer Peng, are you sour in your speech?" There is no place to be ashamed, who doesn't know that several key parts of the engine are changed by you, you can't come, even if the test test results are good, we also know why it is, rather than guessing, it is better to wait for a while. ......, isn't it cool to hear that you have confused the British and Swedish navies? ”

Peng Huading smiled and did not speak.

A team of luxurious cars drove from the airfield to a certain aeronautical research institute.

The two newly assembled engines lie quietly on the test bench more than 100 meters apart, and some technicians are still preparing for the test. The entire test workshop was surrounded by soldiers with loaded guns, and even outside the test workshop there were three steps and one post, five steps and one sentry.

Deng Guohong accompanied Peng Huading and other experts and generals into the test workshop, and the commander-in-chief of the engine test walked in front of Peng Huading: "Report to the chief, the preparations before the test run are ready, please instruct you on how to act next!" ”

Peng Huading said with a smile: "You look at it." ......, if nothing else, let's start testing. ”

The commander-in-chief looked at Peng Huading in surprise, and the other technicians in the test workshop also looked at each other: what kind of rhythm is this, and how is it different from the previous test run?

In their opinion, Peng Huading's answer is too hasty, anyway, for such an important test, you should ask about the situation first, first look at the key numbers, until you can't see any problems, you don't order to start, right? How can anyone order to turn on the machine just after getting out of the car?

Peng Huading smiled and asked, "What, do you still have anything that you haven't prepared?" ”

The commander-in-chief hurriedly said: "No, no, you don't ...... first"

Peng Huading interrupted him and said, "Since you said you were ready, I believe you were ready." ......, test the car first, if there is a problem in the test run, we will talk about it and then solve it. ”

The commander-in-chief was dumbfounded, and said in his heart: How can there be such a thing, this aero engine test is not a child's play, the power is so large, if something happens, it is not a trivial matter, and it may even explode, if the explosion is more powerful than a heavy aerial bomb.

In Peng Huading's view, they must have prepared so carefully in full accordance with the test procedures and test outline, and they must have carried out strict inspections at every step and every process, and they have been signed and approved by the relevant responsible persons, and there must be no problem. I don't know very well about their test procedures, and even if I calm down now, I'm just pretending, how can eggs pick out bones? Besides, his electromechanical technology level is very high, far higher than these experts and masters around him, if there is a problem with this test, he can hear the problem by listening to the sound of the engine, and he can immediately order the shutdown for maintenance, which can eliminate the danger in the bud.

In that case, why waste time on showmanship.

Seeing Peng Huading's insistence, the commander-in-chief did not insist any longer, and after Peng Huading and the others entered the safe observation room, he immediately ordered the technicians to start the power supply to the test bench of the first engine.

As the engine's rotor slowly turned, the blowers lined up in front of the engine's air intake also began to rotate, and its speed became faster and faster, and soon it made a rumbling sound.

The blower is clearly mimicking the wind supply when an airplane is in the air. As we all know, when fighter jets start to take off, as the speed of the aircraft gets faster and faster, the wind speed of the air intake naturally increases. The engine test is carried out on the test platform on the ground, and it is impossible to move the air intake, and the blower must be relied on to simulate the air flow encountered by the aircraft during flight.

Soon, the engine was revving faster and faster, the engine's fuel supply channel opened, and the jet fuel began to enter the engine through the guò oil pipeline, where it burned in the combustion chamber.

The engine starts idling, as if the plane is parked on the ground and has not yet entered the take-off procedure.

In the observation room, Peng Huading was invited by the staff to sit down in the main position, and there were three computer monitors in front of him, which respectively displayed the operating number of the engine, the operating number of the support equipment, and the environmental number.

In addition to the display, there is also a microphone in front of him that gives commands, and a red button that forcibly stops. Apparently this was specially assigned to him by the test team, and it was also to give him the highest power that no one here had: he could interrupt the test at any time.

Others gathered around him or looked up at the large display on the wall.

The large display screen is also facing directly in front of Peng Huading, and it also shows the number of the three display screens in front of Peng Huading. (To be continued......)