Seeing this, Sun Xiaoping hurriedly walked over and sat down on the chair next to Li Tianfeng's desk.

Li Tianfeng said: "Mr. Sun, I was looking for you, I am not in the company these days, are there any difficulties in the development of the turbofan 20 engine, and is the progress going smoothly?" ”

Sun Xiaoping hurriedly made a brief report on the design progress in the past few days, and then said: "Boss, the important and main parts of the compressor part, we have basically completed the design, and I am reviewing them." ”

Li Tianfeng said: "The compressor of the turbofan 20 engine, on the basis of the turbofan 16 engine compressor, has been reduced from the original 9 stages to the current 6 stages, and the efficiency of the compressor is higher, which is a typical advanced load compression system. ”

"Such an advanced load compression system has a high single-stage pressure ratio, fewer stages, a high thrust-to-weight ratio, and good flight performance. For the compression system of advanced loads, the technologies such as low aspect ratio design, pneumatic sweep design, integral leaf ring, and active control of compressor stability are representative new technologies. ”

"Our compressor wide-chord blades, which have a wider chord length compared to narrow-chord blades, resulting in a shorter compressor length and improved resistance to foreign object damage, fatigue resistance and stall margin. It can also reduce the number of compressor parts, reducing production and manufacturing costs. ”

Sun Xiaoping said: "Mr. Li, this compressor technology, compared with the turbofan 16 engine, has a certain improvement, more advanced, and the comprehensive performance is more excellent, I have not figured out why such an advanced compressor design technology is used." ”

Yes, what Sun Xiaoping said is not unreasonable, the use of such advanced compressor technology has a feeling of overkill, because the turbofan 20 engine was successfully developed, and it was only installed in the J-10 fighter. Or on the J-11 fighter, this is only a third-generation fighter, not the most advanced such as the fourth-generation fighter J-20.

Li Tianfeng smiled and said meaningfully: "Mr. Sun, the turbofan 20 engine is just our first military small signal ratio engine, and it will be in the future." There must be a second, a third, one more advanced than the other, and in the development process of the turbofan 20 engine, we will lay the foundation for a more advanced engine. ”

Hearing this, Sun Xiaoping finally understood, and said with admiration: "Boss, your consideration of the problem is really far-reaching, and we have laid a solid foundation in the development process of the turbofan 20 engine." In the future, even if we develop a more advanced military small-channel turbofan engine, we will have a solid enough foundation and ready-made technology to learn from. ”

Li Tianfeng nodded, and then said: "Let's go, Mr. Sun, go to your office, let's take a look at the important and main parts of the compressor that have been designed for the turbofan 20 engine." ”

Mr. Li's office is on the same floor as Mr. Sun's. Not far away, very quickly. The two came to Sun Xiaoping's office.

Li Tianfeng sat in Sun Xiaoping's original position, while Sun Xiaoping moved a chair by himself and sat next to Li Tianfeng.

The two of them first looked at the blades of the compressor, and it was the first-level blade, Li Tianfeng looked at it very carefully and carefully, after reading it. Li Tianfeng said: "Mr. Sun, your design is good, you fully understand the design essence of this engine, I think there is no problem with the design of this blade." ”

Hear the words. Sun Xiaoping was overjoyed: "Boss, thanks to the design sketches you made, we took a lot of detours, otherwise, it would not have been so smooth." ”

Li Tianfeng nodded, and then said: "Our compressor has a total of six stages, of which the first and second stage blades will be coated with our latest polyurethane anti-corrosion coating, and the performance of the blades will be even better." ”

Sun Xiaoping said: "Boss, such advanced compressor technology, coupled with excellent fans, this engine, I think it will be very good, even if it is not as good as the old American F119 engine, but I think the gap is limited, there will not be a big gap." ”

Li Tianfeng said: "Mr. Sun, our turbofan 20 engine, compared with the American F119 engine, there is still a certain gap, this engine will only be the starting point of our development of military small channel ratio turbofan engine, I believe that our next military small channel ratio turbofan engine, I am confident to surpass the American F119 engine." ”

Sun Xiaoping said: "Boss, you are really ambitious. ”

Li Tianfeng said: "The aviation industry must be ambitious, but we must not be arrogant, in foreign countries, especially those aviation industry giants, they have been committed to the research of new technologies, and they are also moving forward." ”

Sun Xiaoping, nodding, agrees with this very much.

Li Tianfeng said: "Mr. Sun, our turbofan 16 engine fan design, comprehensive performance, and design technology are quite outstanding, but as far as I know, foreign countries have begun to develop the latest and most advanced fan technology, and the fan performance has been greatly improved." ”

Seeing Sun Xiaoping listening carefully, Li Tianfeng said: "There is a well-known aero engine company abroad that has successfully developed composite fan rotor blades. The blades are machined from a material consisting of medium-long carbon fibers and reinforced epoxy resin. ”

"The pressure surface of this blade is coated with a polyurethane anticorrosive coating, and the suction surface of the leaf body is coated with a general polyurethane coating. In order to improve the ability of the blade to resist the impact of large birds, the titanium alloy sheet was glued to the leading edge of the blade. In order to avoid the peeling of the adhesive layer of the composite blade during work, the tip of the blade and the trailing edge are sutured with special fine threads; The triangular tenon at the root of the blade is coated with a wear-resistant material with a low coefficient of friction on the surface under pressure. ”

"The fan blades they use such composite materials and processes not only significantly reduce the quality of the blades themselves, but also reduce the quality of their containment rings, discs and the entire rotor system, which has the characteristics of low cost, good anti-vibration (anti-flutter) performance, and strong anti-damage ability."

Sun Xiaoping said: "Such fan blades are more advanced and better than the titanium alloy wide-chord hollow blades used in our turbofan 16 engine!" ”

Li Tianfeng nodded and said: "So, Mr. Sun, we still have to continue to work hard, and we also have to launch new technologies, otherwise, we will not be able to catch up with those aviation industry giants at all." ”

Sun Xiaoping said seriously: "Boss, we must redouble our efforts, under your leadership, we will definitely do a career, catch up with those aviation industry giants, and establish our strong aviation industry." ”

Li Tianfeng gently patted Sun Xiaoping's shoulder, "Mr. Sun, let's work together, for now, we are doing a good job in the development of the turbofan 20 engine, when this engine is excellently developed, I think, the military will also give me another engine development task, the development of the next engine, will be more demanding, the comprehensive performance of the engine will be more excellent." ”

In Sun Xiaoping's office, Li Tianfeng and Sun Xiaoping communicated while carefully reading all the important and main parts of the turbofan 20 engine part, and pointed out some things that needed to be modified and improved one by one.

………….

For a few days, Li Tianfeng basically did not leave the door, and basically stayed in Tianfeng Technology Company, and his main work was also the development of the turbofan 20 engine.

However, Li Tianfeng didn't go out, but others took the initiative to come to the door.

The guest who came was a well-known engineer of a well-known electronics research institute in China, and a part-time doctoral supervisor of a famous university - Gu Qingguo.

Not long ago, Li Tianfeng not personally completed the overall design of the electronic control system of the turbofan 20 engine, but also personally designed several important and key electronic components, and these design drawings were transferred to the research institute where Gu Qingguo was located through the military and placed on Gu Qingguo's desk.

As a veteran of the electronics industry, Gu Qingguo knew that the design and manufacturing technology of these electronic components were basically in the hands of advanced foreign countries, and the country basically relied on imports.

At the same time, Gu Qingguo also knows that such electronic components are mainly used in the aviation industry or the military industry, due to the technical blockade, the design and manufacturing technology of these electronic components is still immature in China.

Gu Qingguo never thought that someone in China had designed it, and it was still a very advanced design, at least one generation ahead of the domestic design, Gu Qingguo estimated that it was no worse than abroad.

In addition to admiration, Gu Qingguo wanted to understand that these design drawings were from the hands of that capable person, and through understanding, he knew that it was designed by Tianfeng Technology Company, Gu Qingguo said in his heart, no wonder.

For Tianfeng Technology Company, Gu Qingguo naturally knows, and also knows their turbofan series engines, and knows that these are all very excellent engines.

Gu Qingguo also guessed that these electronic components should be the electronic components used in the electronic control part of the turbofan 16, turbofan 17 and turbofan 18 engines of Tianfeng Technology Company.

However, Zhang Haiping's voice on the phone was very serious, and his voice seemed to ring in Gu Qingguo's ears, Mr. Gu, you must manufacture these electronic components as soon as possible in accordance with the requirements of the design drawing, this is a political task!

Zhang Haiping said this, saying so formally and seriously, Gu Qingguo guessed that it may not be the electronic components used in engines such as turbofan 16, but the electronic components used in a new type of aero engine under development.

Where did Gu Qingguo dare to slack off, he immediately began to digest and study these drawings, and was ready to manufacture them according to the requirements of the drawings after eating them thoroughly.

Gu Qingguo's research institute not only has strong scientific research capabilities, but also has strong manufacturing capabilities, otherwise, Zhang Haiping would not have chosen this research institute.

After looking at the drawings for a few days, Gu Qingguo discovered the extraordinaryness of these drawings, so he personally went to the door and went to Tianfeng Technology Company.

…………

Today's three watches, the third one is sent! (To be continued......)