Chapter 962: aerodynamics

Chapter 986: Aerodynamics
Looking at everyone, Liu Changyun explained again why he called Zhao Zhongyao here.
After listening, everyone knew why Zhao Zhongyao appeared here.
Zhou Quancheng saw that Zhao Zhongyao was here, and he thought: "You, Zhao Zhongyao, are here. What's wrong with the plane you designed! Today I will see how you treat you. This plane justifies its claim."
After Liu Changyun said what he said, he looked at Zhou Quancheng and said, "Expert Zhou, you can ask expert Zhao if you have any questions, and he will give you a satisfactory explanation."
After hearing Liu Changyun’s words, Zhou Quancheng smiled again and looked at Zhao Zhongyao and said,
Expert Zhao, I and several other experts have also seen your design of the new fighter. We feel that you designed it. This new type of fighter plane is really not very good. Not only is it weird. It also violates the principles of aerodynamics. I really don’t know how you designed such an aircraft. This aircraft can only be in the drawings. Let me show you that if it were made into a real airplane, it would be impossible to fly."
After hearing Zhou Quancheng's words, Zhao Zhongyao smiled and said: "Haha, Expert Zhou, I don't know what you think. I don't know, you know exactly what aerodynamics is."
Zhao Zhongyao had already figured out how to deal with these old guys. Therefore, once he exports, it is not difficult for these old guys to save face.
When Zhou Quancheng heard what Zhao Zhongyao said, his heart suddenly became angry: "Hehe! Really! Several of our aviation experts don't understand aerodynamics. What are you talking about? If we don't understand air Dynamics, how would you know that the geometry of the airplane you designed is not aerodynamic."
After hearing what Zhou Quancheng said, Zhao Zhongyao smiled again and said, "Haha, is it? Since you know what aerodynamics are, then why would you still say that the airplane I designed is impossible to fly."
"Zhao Zhongyao, how do you want me to explain it to you. When we were in college, we studied aircraft design. It can be said that we all came from a class! And you! Before you, it was just a design Expert in firearms.
To put it bluntly, you are just a gunman. You said that if you don't want to be a gunner, you have to design an airplane. Can you design airplanes! After studying at that "Bamboo Sea Aviation Academy" for two months, do you feel like an airplane designer! Don't you think, your thoughts are ridiculous.
Others have to learn a few years of knowledge, can you finish it in two months! You only study for two months, what can you learn! I think you have not even learned to design the fur of an airplane. You are designing this airplane, it is completely nonsense, it is impossible to fly.
I really don’t understand how you can design such a weird airplane. Even if you don’t know how to design, come up with a gourd painting scoop, it won’t be designed like this! "
Zhou Quancheng himself couldn't figure it out. He also didn't understand how Zhao Zhongyao could design such a weird airplane. It is completely beyond the imagination of ordinary people. Not to mention ordinary people, even if he is an aviation expert, he can't imagine how Zhao Zhongyao thought of designing the fighter plane in such a strange look.
Zhao Zhongyao listened to Zhou Quancheng's long-winded words, and then laughed twice and said: "Haha, Expert Zhou, you may not know many things in this world, or you may not have seen them at all. When you have one day , When you see something you haven’t seen yourself, do you think that this thing is very strange. It shouldn’t appear in this world. This is how you think about the airplane I designed! I just want to Four words for you-all the fuss."
After hearing what Zhao Zhongyao said, Zhou Quancheng glared at him again and said: "What do you mean, I am making a fuss. But you should also explain to me how your airplane was designed. Also, you said We aviation experts don’t understand aerodynamics. Then you, a military industry expert, have explained to us what aerodynamics is so that we can gain some insights. We aviation experts are all silly guys. We don’t understand aerodynamics, nor have we studied aerodynamics."
When Zhou Quancheng heard what Zhao Zhongyao said, he was also a little angry. He was thinking that this Zhao Zhongyao might be the one who just fills up the numbers. He might not understand anything at all. He just wanted to show himself, so he designed a kind of airplane casually, saying that this kind of airplane is the most advanced airplane in the world. He just wanted to show himself in front of the leaders.
After hearing what Zhou Quancheng said, Zhao Zhongyao smiled again and said, "Haha, well, since this is the case, then I will teach you so-called aviation experts a lesson! I feel that those you learned before Aviation knowledge may be outdated."
"Okay, well said, the knowledge we learned is outdated, then you can tell us some new aviation knowledge!" Zhou Quancheng looked at Zhao Zhongyao unconvinced and said.
"Okay, you all listened well." Zhao Zhongyao looked at Zhou Quancheng and the others, after thinking about it, he began to explain.
"Aerodynamics is a branch of mechanics. It studies the force characteristics of aircraft or other objects in relative motion with air or other gases, the law of gas flow, and the accompanying physical and chemical changes. It is based on fluid mechanics. Above, a discipline that has grown up with the development of the aviation industry and jet propulsion technology.
The research content of aerodynamics usually refers to the changes of the velocity, temperature, pressure and density of the gas in the flow field of aircraft, missiles and other aircraft under various flight conditions, the lift and drag experienced by the aircraft, and the aerodynamic forces and The law of its change, the physical and chemical changes between the gas medium or gas and the aircraft, and the law of heat and mass transfer. In this sense, aerodynamics has the following two classification methods.
First, according to the speed range of fluid movement or the flying speed of the aircraft, aerodynamics can be divided into low-speed aerodynamics and high-speed aerodynamics. Usually roughly 400 kilometers per hour, this speed is used as the dividing line. In low-speed aerodynamics, the gas medium can be regarded as incompressible, and the corresponding flow is called incompressible flow. For flows greater than this speed, the influence of gas compressibility and changes in gas thermodynamic properties must be considered. This flow corresponding to high-speed aerodynamics is called compressible flow.
Second, according to whether the viscosity of the gas medium must be considered in the flow, aerodynamics can be divided into ideal aerodynamics and viscous aerodynamics.
Generally speaking, the research of aerodynamics is divided into two aspects: theory and experiment. Both theoretical and experimental research are closely integrated with each other and complement each other. The general principles based on theoretical research are: kinematics, follow the law of conservation of mass; dynamics, follow Newton's second law; energy conversion and transfer, follow the law of conservation of energy; thermodynamics, follow the first and second laws of thermodynamics ; In terms of medium properties, follow the corresponding gas state equation and the change law of viscosity and thermal conductivity, etc. "
Zhao Zhongyao looked at Zhou Quancheng and several aviation experts, and explained what he knew about aviation.
Some of this knowledge was relearned by him in the ‘Zhuhai Aviation Academy’. Some are also what he has learned in the world before his death.
After Zhao Zhongyao explained these theoretical knowledge, he took the drawing of the stealth fighter designed by himself and explained: "This new type of fighter I designed this time, although it looks strange, it is still aerodynamic. Principle. If it is designed as a real airplane, it must be able to fly.
Regardless of the geometric appearance of the plane, it still complies with the principles of aerodynamics. As long as the research is successful, you will be able to fly into the sky. The reason why I want to design this kind of airplane into a geometric shape is mainly for invisibility.
As I said, there is a big difference between the new type of fighter I designed and ordinary fighters in that it can evade the reflected waves of air defense radar. If this kind of fighter is designed, even if it flies over the enemy country, it will not be discovered by the enemy country. Because this kind of fighter can disappear on the enemy's air defense radar display.
The enemy's air defense radar cannot detect the new type of fighter we designed, so they don't even want to use air defense missiles to defeat our new type of fighter. You said, the new type of fighter I designed is very advanced. "
Zhao Zhongyao spoke very detailed and professional. After letting Zhou Quancheng and several aviation experts listen to it, they couldn't help feeling shocked by the aviation knowledge that Zhao Zhongyao had mastered. You know, Zhou Quancheng and the others are experts in the aviation industry. The knowledge they have is almost all the aviation knowledge of this era. But after they listened to Zhao Zhongyao's lecture, they felt that it was the first time they heard of some things. I had never heard anyone say it before.
However, how could Zhou Quancheng be willing to concede defeat in front of Zhao Zhongyao! After listening to what Zhao Zhongyao said, he glanced at Zhao Zhongyao with a scornful look and said: "Expert Zhao, we all know what you are talking about. These things are just some theoretical aspects. Knowledge.
But what use do you talk about. We are all experts in aviation knowledge, you just give us theoretical things, I am afraid it is meaningless! If you have the ability, can you get some real things for us to see. "
After Zhou Quancheng finished speaking, several other aviation experts also looked at Zhao Zhongyao and echoed: "Yes! Expert Zhao, what's the use if you don’t practice? We still like to see some young people who are willing to work. I don’t like watching young people who just talk about it."
After hearing what they said, Zhao Zhongyao looked at Zhou Quancheng with a smile and said: "Expert Zhou, how do you want to practice, do you want me to develop a stealth fighter of my design right now! How is this possible. Anything. It will take at least three years for a new fighter to go from design to successful development. How can I develop a real stealth fighter for you right away."
"There is no need to study the real fighter first. I think you might as well study an airplane model fighter first! If you design this kind of aircraft, if you study the real fighter directly, it will be a waste of manpower and material resources. Then, you This plane flies at all, that's not a big joke." Zhou Quancheng looked at Zhao Zhongyao and said.
In fact, Zhou Quancheng had just thought about how to deal with Zhao Zhongyao. He just thought, just listening to Zhao Zhongyao's long-winded theories is meaningless. Since he said that the fighter he designed was reasonable, he had to study an airplane model fighter.
Hearing Zhou Quancheng's words, Zhao Zhongyao sneered and said: "Haha! That's it! That's really great. Before, when I was studying at the Zhuhai Aviation Academy, I had already designed one of my designs. This kind of stealth fighter aircraft model aircraft. If you are not convinced, of course I can design a model aircraft aircraft for you to see."
"Okay! Several of us want to design a new type of fighter plane recently! If this is the case, then we might as well have a competition! Let's design a model aircraft fighter first to see who designed it well. How about it. "After Zhou Quancheng heard what Zhao Zhongyao said, he was of course not convinced. But he thought, if the game is real, it will be a relatively long period of time. It is better to research into a model aircraft and conduct the game, it will not be realized soon.
"Okay, then we can just discuss it." Zhao Zhongyao echoed Zhou Quancheng's words with a smile.
After that, Zhao Zhongyao looked at Liu Changyun again and said, "Minister Liu, Expert Zhou wants to design a model airplane first to compare with the one I designed before. Do you have any instructions? Now I can talk about it. ."
After listening to Zhao Zhongyao’s words, Liu Changyun stood up and looked at everyone and said, "Well, I listened to the conversation between you and you just now. I feel that you professionals, some of the aviation knowledge, I don’t understand. .
It's just what Zhou expert said, I think it can be done. Research on a new type of aircraft is a big project that cannot be accomplished overnight. This requires a series of processes from theory to practice, such as design, demonstration, development, and flight testing.
Expert Zhou just said it was good. Now if we directly research the new type of fighter designed by Expert Zhao, if it can't fly at all, isn't it a waste of manpower and material resources?
Instead of this, it's better to study a model airplane, perform it, and show it to everyone. If this airplane model fighter performs well. Naturally, this new type of fighter can fly into the sky. "