urban bible

Chapter 139 Can the engine be done?

After listening to what Ji Yao said about the engine, Lin Dong softly concluded: "Listen to you, the reason why our aero-engines lag behind is mainly due to the short development time, only good at imitation but insufficient innovation, and insufficient industrial production precision. And other issues?"

Ji Yao nodded: "One is that the country's basic research is weak and the technical reserves are insufficient; the second is that the economy is relatively backward and the development funds are seriously insufficient; the third is that the understanding of the development rules of the technical complexity of the engine is insufficient; the fourth is that the construction front is too long, The stalls are too large, the strength is too scattered, and low-level repetition; fifth, the management model is relatively backward."

Speaking of this, Ji Yao sighed: "Other countries' aircraft and engines are developed separately, but our country is a complete set. What kind of aircraft is developed, what kind of engine is researched. When the aircraft is developed, the development of the engine is stopped. , the result is that there is still a gap of at least 30 years between the current engine and the old American engine, and they also said that our research and development is backward, the main problem is not a technical problem, but a system problem!"

As Ji Yao spoke, she became excited, and a rare angry expression appeared on the face of an angry youth: "If the gap between aviation engines is still excusable, then the car engines are simply caused by some people's short-sightedness! Those small engine companies Many people have no sense of responsibility at all. They only care about making money in the immediate future, and they don’t care whether they can survive in the long run. They also don’t know how to develop and innovate, shrink when they see difficulties, and rely heavily on foreign products. If this continues, how can it reach the international advanced level?”

Speaking of this, Ji Yao regained her senses and looked at Lin Dong calmly: "You should already know how huge and complicated the engine manufacturing is. Are you still going to study this?"

Lin Dong was silent for a while, Ji Yao thought he was thinking, but he didn't know that Lin Dong was sorting out the information that appeared in his mind.According to the normal development trajectory of later generations, it was indeed ten years later that Huaxia had a new type of aero engine that was similar to the international advanced level and was applied to the fifth-generation aircraft. However, the fifth-generation engine in the United States had already been mass-produced for several It has been a year, and a newer generation of engines is also under research, which is still more advanced than Huaxia.

The encyclopedia contains a complete set of information on advanced aero-engines, which Lin Dong can't understand, but this doesn't affect Lin Dong's ability to "move" it out. The question is, who will move it out to?

Aeroengines are something in engineering. Huaxia has insufficient talent and knowledge reserves in engineering. There are less than five or six academicians in engineering in China, and the youngest is 70 years old. I am afraid there will be no follow-up talents in this field. For a moment, Lin Dong didn't know who to give the knowledge in his mind to?
Seeing Lin Dong thinking deeply, Ji Yao didn't bother him. She was still curious, where did Lin Dong get so many wonderful ideas.Ji Yao even felt that when Lin Dong was looking at engine knowledge, he already had a plan in mind.It's just that she doesn't know whether this plan will work or not.

However, thinking of this young man who used to read books in the library with me, in less than half a year, he first built a search engine that attracted the attention of the Internet world, and gave birth to a dark horse in the car battery industry. , maybe, he can really make another big move on the engine?

Lin Dong didn't know anything, so he simply raised his head and found that Ji Yao was looking at him in a daze, so he said: "I know a little about the engine. I will learn more about it later, and see if I can figure it out." What a new idea."

Ji Yao joked: "You can do it! Just like you made the flower search and flower battery, I look forward to you making another flower engine!"

Lin Dong smiled wryly: "I'm afraid it's not easy. Just like what you said, imagine that the maximum afterburner thrust of the Su-27's AL-31 turbofan engine is 12.5 tons. Two engines can push the Su-2 to exceed Flying at twice the speed of sound, but the diameter of the AL-27 fan is less than 31 mm, and the turbine is less than 900 mm. The basic principle of physics is that the forces interact, that is, such a small fan and turbine must bear 300 tons of force , this is the same as a strong man pushes a car with a steel gun on his throat, the throat has to bear the same force as the car. The problem is that the car walks slowly, while the plane flies at hypersonic speed, and the components They have to withstand extremely severe high temperature and high pressure tests, our country's craftsmanship is still lacking!"

Ji Yao blinked: "Did I just say that?"

Lin Dong suddenly felt a little regretful, and he explained the reason, but Ji Yao really didn't say this, it's all in the materials, he just picked up some current materials and used them, unexpectedly, he was caught by Ji Yao Yao found out, Lin Dong had no choice but to point to the book in front of him and said, "I just read a little bit, and I have a little understanding."

"Then you continue!" Ji Yao said with interest: "I used to read these contents by myself, and no one communicated with them. I told you so much just now, and many of them are my own opinions. Let me see yours. What is your point of view, is there anything that can inspire me?"

Lin Dong had no choice but to continue; "A turbofan engine used for a supersonic fighter is generally one meter in diameter and four meters in length. Such a small cylindrical object, such as an AL-31 engine, must be packed into a four-stage engine. Fans, 9-stage compressors, 2-stage vortex, etc., including the control system, how complicated it is! Because of this, only the United Kingdom and the United States have first-class engines, and Russia’s can only be regarded as second-rate. I just saw our country It has broken through the core technology of single-crystal blades of engines, which is an improvement."

"Single crystal leaf?" Ji Yao is a little familiar with this word, but she can't remember it anymore.

"The full name should be single crystal hollow blade, that is, a blade with an area of ​​several square centimeters has a large number of free-form surfaces and complex inner cavities, and is mainly used for air intake cooling." Lin Dong is also difficult to explain, "It is difficult to explain in vernacular Explain, but this is considered the core technology. However, although we have made a breakthrough, it cannot be applied to the current aircraft. Our current aircraft can only use the third-generation turbofan engine. This is really difficult!"

Ji Yao noticed, Lin Dong said it was difficult, she opened her eyes wide and asked, "It is difficult, not impossible, right?"

Lin Dong looked into her eyes, hesitated, and said, "I think...it's possible."

Ji Yao clapped her hands excitedly, suddenly realized that she was in the library, and stuck out her tongue slightly: "It's possible. Let's go, let's not disturb other people, let's go out!"

Lin Dong was stunned by Ji Yao's action, and when he saw Ji Yao's tender tongue, he suddenly had a strange idea... Well, forget it, it's better not to transform into a big bad wolf!
(This chapter is mainly for the foreshadowing, so there are a lot of technical things, and it may be a bit naive in the eyes of professionals. I am laughing at it. I hope you will not be offended. After all, if you want black technology, it is impossible to have fewer engines. of!)
PS: Thank you for the heartbreak of Hongchen Liange, xoom, Nuanyang's Little Bookstore, Jiangqiang's Noodles, Xiaoyi 002, Tragedy Connection, Laziness and other book friends for their rewards!Thank you for your support. I don’t know why in the past two days. Subscriptions have begun to decline. Please order more genuine subscriptions!
(End of this chapter)