When I am reborn, I just want to be a top student

2016, December 2.

The eighth day of the new year.

The Sixth Academy of Aerospace Science and Technology.

Cheng Li arrived at the institute early in the morning, but he was not in a hurry to do anything else. Instead, he called the chief designer Han Ming over.

I told them that Wang Donglai was going to come to the institute to study.

When Han Ming heard the news, he suddenly felt something was wrong.

Although he is a researcher, Han Ming is not the kind of scientific research nerd who only knows technology and nothing else.

Since Cheng Li specifically called him over to explain the matter, Han Ming had a rough guess in his mind.

"Director, you know how important the task I have on hand is. Now is the busiest time. I wish I could split one person into two. I want to write a report and ask you for a few more people. Otherwise, I don't have much confidence in completing this task!"

Han Ming didn't wait for Cheng Li to tell him his plan before he started complaining.

After hearing what Han Ming said, Cheng Li knew that his plan could not be hidden from Han Ming and had been guessed.

A bitter smile appeared on his face, and he said, "Engineer Han, you are the purple gold beam that bridges the sea and the golden jade pillar that supports the sky. I feel most at ease to entrust this task to you. If you can't complete it, I don't think many people can complete it."

"Engineer Han, I know you are very busy recently, with heavy tasks and tight time, so I have found a good helper for you."

"He is the first mathematician in our country to win the three top international mathematics awards, the Fields Medal and the Wolf Prize in Mathematics. His mathematical talent is absolutely beyond doubt."

"I have studied the experience of Academician Wang. Although he is just a mathematician, he actually has some connection with our aerospace industry."

"The solid-state laser radar used in the Chang'e 11 launch vehicle was developed by Academician Wang. Not only that, even the special materials developed by the th Institute are said to have appeared after Academician Wang joined."

"Tell me, will having such a scientific genius join you help your research project?"

As Cheng Liyue spoke, he couldn't help but begin to doubt his previous guess.

Could it be that my previous guess that Wang Donglai was here to poach people was a complete misunderstanding?

Although Cheng Li thought so in his heart, he did not show it.

However, after hearing these two relatively secret pieces of news, Han Ming's expression changed.

His opposition was not as resolute as before, and there was a hint of excitement in his eyes.

"Director, are you telling the truth?"

"Mathematics, solid-state lidar, and the development of a new special material?"

Although Han Ming's reason told him that Cheng Li would not lie about this, as a scientific researcher, Han Ming also understood technology and knew that these were not to say that they were completely unrelated, but they definitely had strong barriers.

How young is Wang Donglai? How could he have such a deep knowledge reserve and strong scientific research ability?

Being able to achieve such great results in the field of mathematics, I am afraid that all my energy has been used up, so how can I have the energy to spend on other fields?

All kinds of thoughts kept emerging in Han Ming's mind, so he asked this question.

"Of course this is true. You also know that some things must be kept secret, so they are not disclosed to the outside world. I can know these things because of my identity. I know a little bit."

"Strictly speaking, what I'm telling you today is a violation of confidentiality regulations, so don't spread it around anymore. Just keep it to yourself."

"How about it, now you don't have much objection in your mind?"

Cheng Li had been a little worried that Han Ming was stubborn and would firmly disagree with Wang Dong coming to study, so he mentioned these two things.

Sure enough, after Han Ming got a positive answer, his eyes suddenly lit up.

"In that case, I certainly have no objection, but there is still one question."

"That means everything we have is highly confidential. Should we avoid him then?"

After agreeing, Han Ming immediately raised a new question.

The rocket engine is the core of the rocket.

The Sixth Academy of Aerospace Science and Technology is the core unit for the research and development of liquid engines, and Cheng Li's research institute is the core of the Sixth Academy of Aerospace Science and Technology. Naturally, there will be a lot of highly confidential information and projects in it.

Therefore, the question raised by Han Ming was not intended to cause trouble, but he really had concerns in this regard.

Hearing Han Ming's question, Cheng Li felt a bit of a headache, but thinking about the notice from above, he still made a decision.

"Except for top-secret documents, other things don't need to be restricted, but you still have to keep good records and don't take it lightly."

Cheng Li warned Han Ming very seriously.

"Ok!"

Han Ming nodded and responded.

Nine o'clock.

Wang Donglai arrived at the research institute on time.

When Wang Donglai met Cheng Li and Han Ming, he immediately noticed that their attitudes were somewhat different.

Although Cheng Li, as the director, showed a warm welcome, Wang Donglai sensed a hint of suspicion coming from Cheng Li through his [Insight].

Wang Donglai was also very confused about this and didn't know why.

However, he didn't care much.

The main reason he came here to study and research was to gain a deeper understanding of this aspect. With his learning ability, it wouldn't take him long to fully master it.

As for Cheng Li's suspicion, he was just worried that he was here to poach people or steal their skills.

Wang Donglai had never thought about this, so he wasn't too worried.

After exchanging a few pleasantries, Cheng Li introduced Han Minglai to Wang Donglai. "Academician Wang, this is our institute's chief designer and technical expert, Engineer Han. Engineer Han happened to have a project, so he asked Engineer Han to take Academician Wang to inspect and study."

Wang Donglai took the initiative to extend his hand and said to Han Ming with a smile: "Engineer Han, I have heard of your name for a long time."

Han Ming also stretched out his hand, shook it, and said, "I don't think I have ever met Academician Wang!"

Wang Donglai explained, "I have read the paper written by Han Gong before, "Research on the Staged Combustion Scheme of Liquid Oxygen-Kerosene Engine", which is indeed a high-quality paper."

Han Ming's eyes lit up, and he immediately became interested. He asked, "Since you have read this paper, what do you think?"

Wang Donglai was not restrained and immediately said, "Liquid oxygen-kerosene engines are indeed very mature, but our technical reserves in this area are far inferior to those of Damao, and Damao is not willing to exchange technology. So in my opinion, if we continue to study this, we can at most be on par with Damao."

"As for the staged combustion scheme, I personally prefer full-flow staged combustion. Theoretically, this is a more scientific design scheme. Once successful, it can also make high-thrust rocket engines a reality."

When talking about his professional field, Han Ming suddenly seemed like a different person.

He did not pay attention to the fact that Wang Donglai's first sentence somewhat rejected his own ideas, but instead focused his attention on the second sentence.

"Although full-flow staged combustion is good, there is an unavoidable problem. That is, the entire flow of the full-flow staged combustion cycle engine must be pressurized by the turbo pump into the pre-combustion chamber. As the chamber pressure increases, the turbine work required will increase. Under the selected pre-combustion chamber mixing ratio, the power provided by the turbine will not be able to meet the power required by the pump, so the chamber pressure will inevitably have an upper limit. How to solve this problem?"

Wang Donglai was not stumped by Han Ming's tricky question, but responded calmly, "Why do we need to solve this problem? The chamber pressure must have an upper and lower limit. This is a problem that all engines have."

"The full-flow staged combustion cycle engine has an upper and lower chamber pressure limit under the selected pre-combustion chamber mixture ratio, which means that the full-flow cycle engine is not suitable for single-engine thrust adjustment. If you want to flexibly adjust the thrust, you must adjust multiple engines. In other words, full-flow staged combustion is not suitable for small single-launch recoverable rockets."

"Based on the high chamber pressure and high room temperature, there are high requirements for the cooling performance of low-temperature fuels, requiring low viscosity, high specific heat capacity, high coking temperature, high latent heat of vaporization, and high density."

"In this case, only liquid oxygen-methane and liquid oxygen-liquid hydrogen meet the requirements, and I think that if the first-stage rocket uses a full-flow staged engine, liquid oxygen-methane is the most suitable."

Watching Wang Donglai talking freely and confidently.

Han Ming and Cheng Li couldn't help but put away the last bit of worry in their hearts.

The fact that Wang Donglai could say this is not just because he had simply read the paper "Research on Staged Combustion Scheme of Liquid Oxygen-Kerosene Engine" written by Han Ming. He must have read a lot of information in this regard, otherwise he would not be able to say the above words.

The smile on Han Ming's face became a little more sincere. He was originally somewhat reluctant in his heart, but after hearing Wang Donglai's words, most of the reluctance had dissipated.

Seeing Wang Donglai and Han Ming having a good chat, Cheng Li felt relieved.

"You two, there is plenty of time for communication. Let's take Academician Wang to visit our institute first."

Cheng Li interrupted their conversation and said this with a smile.

Hearing what Cheng Li said, Wang Donglai and Han Ming naturally had no objections.

Next, Wang Donglai took a good tour under the guidance of Cheng Li and Han Ming.

After dinner, Cheng Li handed Wang Donglai over to Han Ming.

Han Ming was also a straightforward person, and he took Wang Dong directly to his team.

"Academician Wang, we are currently working on a project and are quite busy. We may not be able to take good care of you at times. You should be aware of this."

"In addition, our institute studies rocket engines, so a lot of information is kept confidential. I believe Academician Wang has experienced this before. If Academician Wang wants to see any information, you can tell me and I will help you find it."

"Finally, Academician Wang came to our place to inspect and study. From our conversation just now, I can also tell that Academician Wang already has considerable knowledge and technical reserves in this area. So if you have any questions, you can write them down. When I am free, I can answer them, or you can ask other members of the team."

"Time is tight and the task is heavy. There are some things that are not thoughtful. I hope Academician Wang can understand!"

Although he admired it, Han Ming still remained calm and rational.

The research and development tasks on his hands were already heavy, and this was a critical time, so he didn't want to be disturbed by outsiders.

Fortunately, Wang Donglai had some basic knowledge and was not an ignorant person, otherwise, Han Ming would not be so easy to talk to.

Wang Donglai could naturally understand the meaning of Han Ming's words.

He didn't care, smiled, and said, "Don't worry, Mr. Han, I know these things. I only brought a pair of eyes and a pair of ears this time, and I won't cause you any trouble."

"If there's anything that requires math, I can help. Just ask me."

Seeing that Wang Donglai was so understanding, Han Ming nodded with satisfaction.

“Why is Academician Wang so optimistic about the full-flow combustion engine?”

Han Ming took the initiative to ask on the way.

"Because I have an idea, that is to make recycling, so I pay more attention to this aspect. At the same time, I also think that this technology is indeed very promising!"

“Academician Wang’s idea is very similar to Bald Eagle’s SpaceX.”

"What Mr. Han said is right. I do think the same as SpaceX. I have also founded a space rocket company. From a commercial perspective, recyclability can reduce costs, so I will naturally study it."

"Does Academician Wang also plan to use stainless steel as the material for space rockets? That does require a high-thrust rocket engine, and it also needs to solve the problem of insufficient overall maneuverability, which is quite difficult."

"Everything depends on human efforts. If Bald Eagle's SpaceX can succeed, there is no reason why our country cannot succeed. I have this confidence!"

"Now I understand. Full-flow staged combustion has another great advantage, which is that it can make the operating temperature and pressure of the turbine lower, so that the life of the engine will be longer. However, the full-flow combustion engine has not really demonstrated its reliability yet. It is still in theory. If we want to realize it, there is still some distance to go!"

"From theory to practice, someone has to try. This is also a process that scientific research must go through. I have been prepared for this!"

The more Han Ming communicated with Wang Donglai, the more satisfied he became with him.

From Wang Donglai's words, Han Ming could fully feel that Wang Donglai had a lot of knowledge reserves, which were no less than those of graduate students in this field.

Moreover, in many fields, Wang Donglai already has his own ideas and thoughts.

This point is even more important because these are the qualities and abilities that a qualified scientific research worker should have.

Only by breaking away from old ideas can we develop new technologies.

Innovation, that's it!
Chatting along the way, the two soon arrived at Han Ming's territory. (End of this chapter)