"This is the new compressor test equipment, because with the improvement of the supporting equipment of the SB101 high-altitude platform, the current compressor test equipment can also be connected to the air source supply system of the SB101 high-altitude platform in parallel to realize the simulation of air flow at different altitudes."

While walking, he brought Yang Hui to the new mid-push core machine development team that was being tested, although not all the mid-push core machine development teams were here, but the entire compressor development team was gathered here.

"Coupled with the use of high-power motors developed in China, the new compressor test bench is like SB101, which can also test the compressor compression efficiency curve in the airspace within 25,000 meters.

To put it bluntly, the compressor test equipment is a part of the whole machine test, and the equipment that can test the high-altitude thrust curve of the whole machine has been successfully 50% successful, and the remaining 50% is some additional special equipment, such as the high-power motor used to drive the compressor in the compressor test bench.

The arrival of Yang Hui and Director Bai's explanation along the way attracted the attention of others, and Mr. Wu, who took the lead in developing the new compressor design, was deaf and clear-sighted, and he also saw Yang Hui, a young man who made a deep impression on Mr. Wu.

"Yang Hui, right? I still remember you, I guessed that you will definitely arrive at an important node in the development of the core machine, and sure enough, you will not arrive! Come on, come on"

Old man Wu has a good impression of Yang Hui, who introduced himself into the 624 Institute to develop the core machine. Not only did he participate in the development of a core machine in 624, but the most important thing was that Mr. Wu felt the environment of not worrying about funds in scientific research for the first time. At this point, you must have a great impression of Yang Hui.

And taking Yang Hui to see his achievements in the past year and a half in the 624 Institute is the best way to express it, and I believe it is also what Yang Hui hopes to see the most.

Walk past the compressor test bench. The sound of the wind brought by the high-speed rotation of the compressor makes people feel a chill from the bottom of their hearts, and this ultra-high air velocity may be able to blow people away.

Yang Hui was not afraid of this thing, and he carefully observed the work of the entire compressor test bench with a curious probe.

Seeing Yang Hui's curious look, Wu Lao patted Yang Hui's shoulder: "You don't need to look at it, that is, it will be a little strange to watch it once or twice, and after a few more times, it won't be interesting to this thing, you don't have to worry about this, come with me to see the specific test data." It's more exciting to look at the data visually than to look at the test equipment. ”

It took a long circle to arrive at the data processing and analysis center separated by a wall of the compressor test bench, and walked into the data processing center with a good sound insulation effect, and the style of painting changed suddenly.

Gone are the test halls that were still full of pipelines, and the conspicuous reminder signs are gone, replaced by bright spaces, and although there is only a not-so-advanced supercomputer, it is still the most eye-catching.

"This is a reduced version of the Galaxy supercomputer developed in 83, which originally had 100 million computing power per second, but because we don't have much need now. It doesn't take too much computing resources, so only a supercomputer with a capacity of 60 million milliseconds is installed, and you can continue to upgrade and add cabinets if you need it in the future. ”

Hearing the source of this supercomputer introduced by Wu Lao, Yang Hui understood what it was. It turned out to be a low-cost Galaxy computer, and given the unique architecture of supercomputing, this kind of change of computing power by adding or removing processors (cabinets) is also a good solution.

Yang Hui doesn't know much about supercomputers. But he knows that the current test equipment does not need much peak computing power, but more needs continuous output. So you really can't do without it. Fortunately, this is not something that Yang Hui should care about, when Wu Lao took out some raw data. Yang Hui was attracted.

The original data is also the thing that can best reflect the level of industrial design, especially the compressor, each stage of the compressor impeller must compress and rectify the air compressed by the upper impeller again, the more the compressor impeller workload is larger, and the compression efficiency is lower and lower.

The data that Yang Hui sees now is the structural design of the entire high-pressure compressor, and the structural design of the compressor is a great test for the designer, which is as important as the compressor blade design.

Although Wu Lao is only an authority on the blade design, this does not change Wu Lao will not be able to play the compressor structural design, on the contrary, because the structural design and the blade design are equally important, Wu Lao is also very interested in the compressor structural design while in-depth study of the blade design.

Looking at the introduction of the entire blade structure design, Yang Hui has been assured of the compressor structure design scheme of this core machine, and in all aspects, at least there will be no gap between the international mainstream third-generation turbofan, and some places even faintly surpass.

Due to the high requirements put forward by Southwest Science and Industry at the beginning, in view of the fact that the big guy like the Super Hornet will be used in the future, the engine needs to have greater thrust, and the new core engine should be different from the turbofan 10 engine in production at the beginning, and try to avoid the thrust overlap range of the two engines.

THEREFORE, UNDER THE LEADERSHIP OF WU LAO, THE AIR FLOW RATE OF THE HIGH-PRESSURE COMPRESSOR WAS SET RELATIVELY HIGH, AND THE AIR FLOW RATE OF THE HIGH-PRESSURE COMPRESSOR WAS SET TO 60KG/S OR MORE AT THE BEGINNING, WHICH WAS MUCH HIGHER THAN THE F404 WONDERFUL 52KG/S, BUT THERE WAS A PRICE.

In order to have a larger air flow, it is necessary to have a stronger air compression capacity, up to 8 levels of high-pressure compressors were designed by Wu Lao, this 8-level structural design than the F404 high-pressure compressor design of one more stage of pressurized turbine, but also than the Soviet RD33 9-stage high-pressure compressor design of one less level.

Although it is one level less than RD33, this does not affect the efficiency of the new compressor at all, all thanks to Wu Lao's strong design ability, after all, it is an old study of impeller blade design for many years, and the new impeller design is completely designed in accordance with Wu Lao's ternary flow.

The efficiency of the whole compressor is not lower than that of the RD33 compressor, and the efficiency loss in high-altitude flight is better than that of the F404, which can be said to have fully learned the lessons of the two engines.

The design of the high-pressure gas machine is not only the high-pressure rotor part, the stator design in the compressor is also very important, without the rectification of the stator, the air flow from the impeller of the upper stage is relatively disordered, which is very unfavorable to the work of the next impeller.

In order to rectify the flow, the stator was invented, which is located between the front and rear impellers, and the stator is usually fixed on the wall of the compressor casing without turning.

This design is very good, but it also has its disadvantages, due to the different thrust conditions of the engine, it will cause different engine speeds, compression efficiency, and even different air flows, at this time, the fixed stator blades can not be adapted, and the efficiency loss is relatively large.

So General Motors invented the adjustable stator, which changed the compressor impeller blade shape through a small rotation of the stator fixed ring, so as to achieve improvisation, which was the same era as the turbojet 7 obtained by the Republic, and the Soviet Union at that time naturally did not know about this kind of thing invented by the Americans.

This led to the fact that the Republic's turbojet 7 and even turbojet 13 did not use the adjustable stator, but fortunately, the Republic imported the Spey 202 engine from the United Kingdom, and learned the design of the adjustable stator from the Spey 202 (turbofan 9) engine.

In this case, in order to improve the efficiency of the compressor and ensure that there is better performance at all heights and under various thrust conditions, Wu Lao directly used the adjustable stator design, and the first three stator blades were made into adjustable design, which is also a bold use of new technology in the core machine. (To be continued.) )