2016, February 15th.
The eighth day of the Lunar New Year.
The Sixth Aerospace Academy.
Cheng Li arrived at the institute early in the morning, but he was not in a hurry to do anything else. Instead, he called Han Ming, the chief designer of the institute, over.
Told Wang Donglai that he was coming to the institute to study.
As soon as he heard the news, Han Ming suddenly felt a bad feeling in his heart.
Although he is a researcher, Han Ming is not the kind of scientific research nerd who only understands technology and does not understand other things.
Since Cheng Li specially called him over to introduce the matter, Han Ming had a rough guess in his mind.
"Director, you know how important the task at hand is. Now is the busiest time. One person can't wait to be divided into two. I want to report and ask you how many people you want. , Otherwise, I won’t have much confidence to complete this task!”
Han Ming complained before Cheng Li could tell his plan.
And hearing what Han Ming said, Cheng Li also knew that his plan could not be hidden from Han Ming and had been guessed.
A trace of a wry smile appeared on his face, and he said aloud: "Gong Han, you are our purple golden beam that supports the sea and the golden jade pillar that holds the sky. I am most relieved to leave this task to you. If you can't finish it, I don't think many people can finish it."
"Han Gong, I know you are very busy recently, with heavy tasks and tight time, so I will just find it for you. Is he a good helper?”
“We are the first mathematician in China to win three top international mathematics awards, including the Fields Medal and the Wolf Prize in Mathematics. His mathematical talent is absolutely incredible. "
"I have studied the experience of Academician Wang. Even though he is just a mathematician, he actually has some connections with our aerospace industry."
"The solid-state lidar used in the previous Chang'e-5 launcher was developed by Academician Wang. Not only that, but even the special materials developed by the 11th Institute were said to have only appeared after Academician Wang joined. "
"Do you think it will help your scientific research project to have such a scientific research genius join you?"
Cheng Liyue said, and he couldn't help but start to doubt his previous guesses. .
Could it be that my previous guess that Wang Donglai was here to recruit people was a complete misunderstanding.
Thinking this in his heart, Cheng Li did not show it.
However, after hearing these two relatively secret news, Han Ming's expression changed.
The opposition was not as firm as before, and there was a trace of heartbeat in his eyes.
“Director, are you telling the truth?”
“It’s mathematics, it’s solid-state laser radar, and it also developed a new special material?”
>
Although reason told Han Ming that Cheng Li would not lie about this, as a scientific researcher, Han Ming also understands technology and knows that these are not unrelated, but they definitely count. The barriers are deep.
Wang Donglai is so young, how could he have such a deep knowledge reserve and strong scientific research strength.
To be able to make such great achievements in the field of mathematics, I am afraid that all the energy has been used up, and there will be no energy to spend in other fields.
All kinds of thoughts kept popping up 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 this because of my identity, so I know a few things."
“I’m telling you today, strictly speaking, it’s a violation of confidentiality regulations, so you don’t want to spread the word anymore, just know it yourself.”
"How about it? You don't have much objection now, do you?"
Cheng Li was also a little worried that Han Ming was a stubborn person and would always firmly disagree with Wang Dong's inspection and study, so he told these two things. .
Sure enough, after Han Ming got the affirmative answer, his eyes suddenly lit up.
"In this case, of course I have no objection, but there is still a question."
"That is, all our things are highly confidential. Should we avoid them when the time comes? Open him?”
After Han Ming agreed, he immediately raised a new question.
The rocket engine serves as the core of the rocket.
The Sixth Aerospace Institute is the core unit for the development of liquid engines, and Cheng Li's research institute is the core of the Sixth Aerospace Institute. Naturally, there will be a lot of highly confidential information and projects in it.
So, the question raised by Han Ming was not deliberately looking for trouble, but he was really worried about this.
Cheng Li also had a headache when he heard Han Ming ask this, but after thinking about the notice given by the above, he still made a decision.
"Except for top-secret documents, there is no need to deliberately restrict other things, but we must do a good job of recording and not take it lightly."
Cheng Li warned Han Ming with a very serious look.
“Yes!”
Han Ming nodded and said in response.
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.
As the director, Cheng Li showed a warm welcome, but Wang Donglai felt a trace of suspicion coming from Cheng Li through [Insight].
Wang Donglai was also puzzled about this and didn't know why.
However, he didn’t pay much attention.
The main reason he came here to investigate and study is to have a deeper understanding of this aspect. With his learning ability, it won't take him long to fully master it.
As for Cheng Li's suspicion, he was simply worried that he was here to poach people or to learn techniques secretly.
Wang Donglai had never thought about this, so he didn’t have much to worry about.
After a few polite words at the meeting, Cheng Li introduced Han Ming to Wang Donglai. "Academician Wang, this is Han Gong, the chief designer of our institute and also our institute's technical master. It happened that Han Gong had a project in hand, so he asked Han Gong to take Academician Wang to inspect and study."
Wang Donglai reached out his hand, smiled at Han Ming and said, "Han Gong, I have long admired your name."
Han Ming also stretched out his hand, shook it, and said: "I remember that I have never seen Academician Wang!"
Wang Donglai explained aloud: "I have read the article written by Han Gong before. "Research on the staged combustion scheme of liquid oxygen kerosene engine" "Research" is indeed a high-quality paper."
Han Ming's eyes lit up, and he suddenly became interested and asked: "Now that you have read this paper, what do you think? ”
Wang Donglai was not restrained and immediately He said aloud: "The liquid oxygen kerosene engine is indeed very mature, but our technical reserves in this regard are far inferior to that of Da Mao, and Da Mao is not willing to exchange technology, so in my opinion, further research on this is at best It’s the same as Da Mao.”
“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 large-scale combustion. Thrust rocket engines become a reality ”
When it comes to his professional field, Han Ming suddenly seemed like a different person.
I didn't care that Wang Donglai's first sentence refuted his own ideas, but focused on the second sentence.
“Although full-flow staged combustion is good, there is a problem that cannot be avoided, that is, all the flow of the full-flow staged combustion cycle engine must be pressurized by the turbopump and enter the precombustion chamber. As the chamber pressure increases, This further requires the turbine to do more work, Under the selected precombustion chamber mixing ratio, the power provided by the turbine cannot meet the power required by the pump, so the chamber pressure must have an upper limit. How to solve this problem? "
Wang Donglai faced Han Ming? I was not stumped by the tricky questions raised; Instead, he responded extremely calmly: "Why should we solve this problem? The chamber pressure must have an upper limit and a lower limit. This is a problem that exists in all engines."
"When selecting a full-flow staged combustion cycle engine, Under the precombustion chamber mixing ratio, there are upper and lower chamber pressure limits, 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. That is to say, full-flow staged combustion is not suitable for single-engine thrust adjustment. Suitable for small single-shot retrievable rockets”
"Based on the high chamber pressure and high room temperature, there are very high requirements for the cooling performance of low-temperature fuel, which requires low viscosity, high specific heat capacity, high coking temperature, high latent heat of vaporization, and high density."
< br>"In this way, Only liquid oxygen methane and liquid oxygen and 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.”
Looking at Wang Donglai talking, A look of confidence.
Han Ming and Cheng Li couldn't help but put away their last trace of worry.
For Wang Donglai to say such a thing, he has not simply read the paper "Research on the Staged Combustion Scheme of Liquid Oxygen Kerosene Engine" written by Han Ming. He must have read it in this regard. There is a lot of information, otherwise, it would be impossible to say what I said above.
The smile on Han Ming's face also became more sincere. He was still somewhat reluctant in his heart, but now with Wang Donglai's words, most of it dissipated.
Seeing Wang Donglai and Han Ming chatting happily, Cheng Li felt relieved.
"You two, we have plenty of time to communicate next. Let's take Academician Wang to visit our institute first."
Cheng Li interrupted the exchange between the two, smiling. So said.
After hearing what Cheng Li said, Wang Donglai and Han Ming naturally had no objections.
Next, Wang Donglai took a good tour under the leadership of Cheng Li and Han Ming.
After dinner, Cheng Li handed Wang Donglai to Han Ming.
Han Ming was also a straightforward person and took Wang Donglai directly to his team.
"Academician Wang, we have been working on a project recently and have been quite busy. We may not take care of it properly sometimes. You have an idea."
"The other thing is that our institute studies rocket engines. Therefore, a lot of information is confidential. I believe Academician Wang has experienced this before. If Academician Wang wants to see any information, you can tell me and I will find it for you.”
"Finally, Academician Wang came to us for inspection and study, but I can also tell from the chat just now that Academician Wang already has a considerable knowledge and technology reserve in this area, so if you have any questions, you can record them. When I'm free, I can come in Please answer, or you can ask other members of the team.”
“The time is tight and the task is heavy. I hope Academician Wang can understand it.”
Appreciate it, appreciate it! Han Ming still remained calm and rational.
The research and development tasks on his hands are already heavy. It is a critical time, and he does not want to be disturbed by outsiders.
Fortunately, Wang Donglai has some basic skills and is not an inexperienced person. Otherwise, Han Ming would not be so easy to talk to.
Wang Donglai naturally understood the meaning of Han Ming's words.
I didn't care, smiled, and said aloud: "Don't worry, Mr. Han, I know these things. I only brought a pair of eyes and a pair of ears with me this time, so I won't cause you any trouble. "
"If there is any need to use mathematics, I can help, just ask me."
Seeing Wang Donglai being so polite, Han Ming felt satisfied. nod.
“Why is Academician Wang so optimistic about full-flow combustion engines?”
Han Ming took the initiative to ask questions on the way.
“Because I have an idea, that is, recycling, so I pay more attention to this aspect. At the same time, I also think this technology is indeed very promising!”
“Academician Wang’s The idea is very similar to that of Bald Eagle’s SpaceX.”
“Han Gong is right. I do think the same as SpaceX. A space rocket company has also been established. From a business perspective, recycling can reduce costs, so I will naturally study it."
"Is Academician Wang also planning to use stainless steel as a material for space rockets? It does require a rocket engine with high thrust, and it also needs to solve the problem of insufficient overall mobility, which is a bit difficult.”
"It all depends on people. Even Bald Eagle's SpaceX can succeed. There is no reason why our country cannot succeed. I have this confidence!" The advantage is that the turbine can operate at a lower temperature and at lower pressure, so the engine life will be longer. However, full flow combustion. The engine has not really shown its reliability yet. It is still in theory. If you want to realize it, there is still a long way to go!”
“From theory to practice, someone always needs to try, and this is also true. Scientific research must go through a process, and I have been prepared for this for a long time!”
The more he communicated with Wang Donglai, the more satisfied Han Ming became with Wang Donglai.
From Wang Donglai's words, Han Ming could completely feel that Wang Donglai had a lot of knowledge reserves, which was no less than a graduate student in this field.
Moreover, in many fields, Wang Donglai already has his own ideas and ideas.
This is even more important, because this is the quality and ability that a qualified scientific research staff should have.
Only by getting out of the old way of thinking can we develop new technologies.
Innovating with the old and bringing forth the new, that’s it!
Just chatting all the way, the two soon arrived at Han Ming's territory. (End of chapter)