Hearing Yang Jie's words, He Yongqing also said excitedly: "That Yonghan Aviation Power Technology Company is also amazing!"

"Yes, the third-generation single crystal blade represents the highest level in China, and looking at the world, such blades are also top-notch. Now your company has broken through the technology of single crystal high-temperature materials and thermal barrier coatings, which has opened the technical door of the fourth-generation engine for our country, and also broken the technological blockade of Western countries such as Europe and the United States."

He Zhipeng said.

"That's not easy, it's very difficult to prototype such a blade. ”

Ma Qiulin asked.

"We use directional solidification casting technology, it is relatively smooth, after several batches of trial production, until now the process has basically been explored, and then mass production in the future, the process will continue to be optimized, and then the manufacture of this blade will be relatively smooth. ”

Wang Yonglin said.

The key to the manufacture of blades like this is that there must be a mature process technology, as long as the process is mature, it can be manufactured in accordance with this process in the future, and there will generally be no more problems.

"Congratulations to your company!"

Ma Qiulin said happily.

"It seems that your Yonghan Aviation Power Technology Company can develop a mature large-bypass ratio turbofan engine before the completion of the aircraft prototype of our COMAC Group. He Yongqing said with a smile.

"We did our best to cooperate. Yang Jie said with a smile.

"Yang Shao, I don't know where you found such a powerful expert, can overcome the third generation of single crystal high temperature materials, as far as I know, the first generation of single crystal turbine blade manufacturing in China, you began to trial production of the third generation of single crystal turbine blades, your company's technical strength is too strong. ”

He Zhipeng said with emotion.

"It was also my luck to find these top talents like Mr. Wang. Yang Jie said with a smile.

Although the company is also carrying out a bunch of complex fluid mechanics theory and numerical research on compressors, basic theoretical research and design of combustion chambers, and research on single crystal materials and powder metallurgy technology, these studies are very complex, and he only said some product technologies that can be seen.

Yang Jie knows that in order to develop a high-performance aero engine, the company must thoroughly understand these basic theories, so in recent years, a group of doctoral students engaged in this research have been recruited from domestic research institutes and several universities to do research in Yonghan Aviation Power Technology Co., Ltd.

The experimental volume of the combustion chamber can basically account for half of the total experimental volume of engine research and development, Yonghan company has specially established a combustion chamber laboratory for the research of the combustion chamber, and has purchased a batch of expensive test equipment to observe the internal combustion of the combustion chamber.

In the past, the combustion chamber needed to be wrapped in a thick casing, and only a few thermocouples or sampling tubes could be extended into it, so it was difficult to have an in-depth understanding of the internal flow field.

However, Yang Jie is well aware of the importance of observation methods, and has spent a lot of money to use all the high-end testing equipment that can be used, in order to save time.

Konstantin is very experienced in the design of combustion chambers, and he personally led the team to debug the equipment, so that the experiments with the combustion chambers can now be carried out smoothly.

However, in such a small place as the combustion chamber with a length and width of no more than 300mm, it is necessary to organize efficient and stable combustion, low emission, stable and no oscillation, uniform outlet, efficient cooling, wide fire envelope line, low flame-out boundary, it can be said that it is a dojo in a snail shell, and the company also needs to develop aero engines with greater thrust, which requires rich experience and innovative thinking of designers.

Yang Jie can proudly say that Yonghan Aviation Power Technology Co., Ltd. is on par with foreign general, Pratt & Whitney, and Rolls-Royce giants in the hardware facilities of the combustion chamber, and uses simulation software, and all the means that can be used are used.

Konstantin used simulation software to build a very accurate algorithm model by himself, which greatly saved the time of design and test verification.

Despite this, the nozzle atomization involved in the combustion chamber involves very complex fluid mechanics such as droplet crushing mechanism, flow, blending, evaporation, etc., and the simulation software cannot directly simulate the fineness of atomized particles at this stage, so it can only be designed through experience and then improved.

Fortunately, Yonghan Aviation Science and Technology Power Company has found a group of experienced scientists, and Yang Jie hopes that this group of scientists can train more technical teams, among which a stunning figure can be regarded as the greatest success.

The top experts in aero engines are not so easy to train, sometimes they can only rely on luck, but even if they can't produce those geniuses, the company's accumulated large amount of experimental data and algorithm models can also ensure that the company can design a good engine, at least without any major defects.

After a long time, He Yongqing said to Yang Jie: "Yang Shao, can you let me take a look at the wide-chord titanium alloy hollow blades trial-produced by your company?"

"Absolutely. ”

Wang Yonglin immediately arranged for someone to quickly bring such parts over.

Something was quickly taken, the fan blades were relatively large, hundreds of millimeters in length, almost the width of a palm.

As soon as the fan blades were placed on the table, He Yongqing immediately picked up the fan blades and looked at them, the fan blades looked very large. But the weight is very light, He Yongqing checked it, and nodded secretly, this is definitely a titanium alloy wide-chord hollow blade.

He Yongqing is worthy of being a technical background, he looked very carefully, and knew the key points, after looking at it, he handed the blade in his hand to He Zhipeng.

"I visited Rolls-Royce in the UK two years ago. I have also seen their titanium alloy wide-chord hollow fan blades, and the quality of this blade you have tried to produce is no worse than theirs. ”

Wang Yonglin said with a smile: "Our company's fan blades are superplastic molding and joining process, the two halves of titanium alloy blades are sandwiched with metal honeycomb welded together, superplastic molding extrudes complex blades, and then we also use high-precision and high-speed grinding blade technology. ”

He Yongqing and He Zhipeng's eyes also widened.

"These two technologies are the process technologies that only the three overseas aviation development giants have mastered, right?"

He Yongqing asked.

"Mr. Wang has worked in Rolls-Royce for more than 20 years and has a very good understanding of Rolls-Royce's processing technology. Of course, our company has also made improvements in the process. ”

Yang Jie said with a smile.

"Yang Shao, it's really amazing that you can find so many top talents!"

He Yongqing said with emotion.

Yang Jie smiled, and said in his heart that I had made a lot of money in order to find these talents.

He Yongqing said: "Mr. Wang, you are really not simple, it can be seen through these two blades that you have now reached the standard of the fourth generation engine in terms of materials, which is really a big step forward for our country's aviation development." ”

"We also have to speed up, now the airworthiness requirements of the international civil aviation group are formulated in accordance with the three giant companies of General Motors, Rolls-Royce, Pratt & Whitney, very rogue, that is, to prevent newcomers from entering, now these companies are using the fourth generation of technology, if another ten years, the fifth generation of aero engine technology will definitely come out, leaving us with very limited time. ”

Yang Jie said.

He Yongqing also said with emotion: "This is indeed very unfair to other countries, unless the technical level of Yonghan Aero Engine is close to these companies." ”

He knows that these aviation giant companies have mastered the technology of the fourth generation engine in the 90s, and are now developing the fifth generation of aero engine technology.

"Yang Shao, the structure of your core machine is very similar to that of foreign countries, and now you have made a major breakthrough in materials, if you change the materials, you must be able to launch the fourth-generation turbofan engine soon. ”

He Zhipeng said.