Chapter 262 Composite Power Rocket
"Okay, I'm going to start talking to Shen Hai. In a sense, this is the end of my nomadic career, but I don't know when you can return to Shen Hai."
Lin Jia laughed and joked, suddenly feeling a little melancholy when talking about when Chen Yuanguang would return to Shenhai.
“I don’t know either.” Chen Yuanguang was equally melancholy, “But it’s not just me who will be in Mianyang, some people from Guangjia Aerospace will be transferred to Mianyang in the future.
Participate in Hehuaguo Aerospace The composite rocket program
I will send you the list later. You tell them to prepare and communicate clearly with their families. There will be business travel subsidies and housing problems will be solved for them when they come here.
It is estimated that it will last from the third quarter of this year to next year. The specific end time will depend on when our composite rocket is successfully launched. "
"Okay. ”
After full investigation and risk elimination, the selected people obviously include Yang Jiashan and Lin Tianmin.
As a former core developer of the Long March rocket, Yang Jiashan has already gone through a lot of experience. Know how many rounds of review
Lin Tianmin, as a bachelor's and master's student of Beihang University, went to America for the first time and experienced a series of experiences such as the frame-up of Lao Hei's corpse, a few-day tour of the interrogation room, and being woken up in the middle of the night to witness his unlimited travel. After full investigation, he also succeeded. Pass.
On the special plane to Mianyang, Lin Tianmin seemed very excited: "How will the composite rocket be designed? Although NASA, Amerikan, and some commercial space agencies such as Neon, There are some designs for this.
But these designs are still in the imagination stage and are far from actual launch.
Let alone launch, they are not even feasible. The research has not passed.
And this time we are actually going to send the rocket into space.”
Yang Jiashan was obviously not as excited as him, which was understandable. Lin Tianmin was alone, unmarried, and didn't even have a partner. Being able to participate in such a project made him excited.
Speaking of this, today, when salaries of Guangjia Aerospace employees are generally reduced in the financial industry, their priority in Shenhai’s blind date market is definitely higher than that of employees in the core departments of most Internet giants. high.
It is quite the same level of preferential treatment that Alibaba employees enjoyed at the Hangzhou Dating Corner when Alibaba was at its peak.
“It is indeed very challenging, and it sounds interesting just to hear it.
But the more challenging it is, the lower the possibility that we can return to Shenhai early.
Alas, I don’t want the two places to be separated for too long. It’s no different now than it was in the last century. It’s easy to cause problems if the two places are separated for a long time.
When I was still at China Aerospace, there were many cases where my colleagues had similar cases where their marriages broke up due to separation in two places.
Look at Mr. Lin, he is in the best mood every Monday, because he just met with the God of Light over the weekend, and then his whole body pressure dropped all the way. By the time of the regular weekly meeting on Friday, the negative energy was overwhelming. Once If there are any mistakes or things that don't satisfy her, she will be squirted hard.
This is the disadvantage of living apart.
I think back when Guangshen was still in Shenhai, Mr. Lin’s meetings were always gentle and gentle, and he never spoke too loudly, let alone slandering others. ”
Yang Jiashan complained fiercely.
Lin Tianmin laughed when he heard this, but he didn't dare to laugh. Yang Jiashan Wuyu just complained casually. He laughed and if he was reported to Lin Jia, he would be put in the shoes.
"I believe in Guangshen. This project can't be completed for three to five years." After Lin Tianmin finished speaking, he suddenly realized: "I feel that Mr. Lin is right. We do have dependence on Guangshen. .
Before the change, if we were able to build a composite-powered rocket even if it took ten or eight years, let alone three to five years, I thought we were too good. It’s so successful.
I think it took three to five years to make it.”
"That's right. The question is, why don't you rely on geniuses if you have them?
In the past, the scientific and technological progress of human society relied on the top batch of geniuses.
In the past, China did not produce similar geniuses. Of course, what we do is also based on foreign methods, from 1 to 100, and the degree of reliance on genius is not that high.
But now, a lot of what we do is from 0 to 1. We cannot achieve our goals by relying on ordinary geniuses. We have a genius like Guangshen that we can rely on. Why not do this?
When I first joined Guangjia Aerospace, I called him Mr. Chen. , and then I was willing to call him God of Light
I think it is very lucky to have such geniuses to rely on. We may be able to complete the path of commercial aerospace that originally took fifty years to mature in just ten years.
From a higher dimension, it is even a lucky thing for all mankind. Only with hope can we prevent a global war. Yang Jiashan sighed with emotion: "So even if Amerikan's assassination of the God of Light succeeds, he will only gain short-term gains and lose the future." "
The conversation between the two of them was very quiet, and the people next to them could only hear a few words if they pricked their ears.
After listening, Lin Tianmin nodded in agreement and helped mankind by going to outer space. When competing for the incremental cake, Chen Yuanguang often expressed similar views in Guangjia Aerospace.
At the beginning, everyone generally did not believe this view, thinking that it was a pie in the cake. For the sake of remuneration, the pie was painted. Cake.
In recent years, everyone has become more and more convinced of this, thinking that what they are doing is a grand undertaking that can be written into human history.
Guangjia Aerospace has such a high reputation in the recruitment market, which has a lot to do with it.
“Everyone, long time no see, I feel like everyone’s hair has become thinner.” The next day, the light armor aerospace R&D personnel from Shenhai were not given a day off and were directly dragged into the meeting. Chen Yuanguang came to the office to understand the situation, and Chen Yuanguang first made fun of him.
After speaking, an employee standing in front of Chen Yuanguang complained: "Guangshen, their hair is thinning, but I don't have it."
After finishing speaking, he took off his hair: " This is a wig, and my hair is falling out too fast. I thought it wouldn’t be a problem if I wore the Mediterranean. I just shaved my head and wore a wig.”
Everyone knows that Chen Yuanguang can joke and has no concept of superiors and subordinates. He treats everyone as partners rather than subordinates.
"Xugong, you should be open-minded and willing to give up. Only when you give up can you gain something. What you give up is your own sparse hair, but what you get is a head of thick hair." Chen Yuanguang said with a smile: "Others can do it too. Follow suit.
At this year’s annual meeting, everyone can collectively lose their hair to pay tribute after the performance. Others take off their hats and we lose our hair!”
After the teasing session ended, Chen Yuanguang projected on the screen. I drew a rocket design drawing:
“This time my rocket design is very different, not to mention that it uses composite power.
It will be composed of an electric drive engine and a fossil fuel engine. Even for fossil fuels, we plan to use low-temperature liquid hydrogen.
We will use cryogenic liquid hydrogen and oxygen as fuel to build its thrust system.
The entire three-stage launch, the first stage uses a normal temperature superconducting electromagnetic drive system, giving it an initial initial speed through the ground transmission tower.
Then the second stage is low-temperature liquid hydrogen and oxygen. Secondary acceleration is achieved through a complete cluster of small engines.
In the third stage, we need to use the electric drive engine to give it a force until it enters the predetermined orbit.
Everyone knows that methane is the most mature fuel in the field of rocket engines. It has an excellent balance of performance, reliability and storability.
Cryogenic liquid hydrogen is a bit unstable and has a relatively high risk of explosion.
I can tell you clearly that the reason why we choose liquid hydrogen as fuel is that after we build a base on the moon in the future, the lunar base will decompose lunar water, and the decomposed hydrogen and oxygen can be used as fuel. .
The space station and lunar base will be the transfer stations for our space mining. The large and abundant resources on the moon will undertake very important tasks.
Including helping composite rockets replenish fossil fuels.
So we choose liquid hydrogen as a fossil fuel. ”
To put it simply, if you are just going to the moon or Mars, then methane is definitely a better fuel.
If you consider traveling between the space station and the moon base, then liquid hydrogen It is undoubtedly a better choice.
Producing hydrogen on the lunar surface will be easier than preparing methane. Considering that the far side of the moon is minus 183 degrees Celsius, it is also easier to convert hydrogen into liquid hydrogen and prepare fossil fuel coolant.
After hearing Chen Yuanguang's opening remarks, Lin Tianmin glanced at Yang Jiashan with a cautious expression, because it didn't sound like it could be done in one year, not even by Guangshen.
If you don’t blow it up a dozen times, you may not even be able to touch the edge of success.
They have never heard of the explosion of this type of rocket, so they conservatively estimate that it will take three years to successfully develop it.
“In order to ensure that liquid hydrogen will not explode, we added a shell made of carbon fiber and glass fiber reinforced polymer outside the engine thrust chamber and a new ceramic matrix composite material inside it. The materials are named C1 and C2 respectively. "
If the Neon car companies that are betting on hydrogen energy know that Huaguo has developed this thing, they will have to use these two new technologies even if they use share swaps. The material preparation process is purchased. C2 is actually optimized based on 12K fiber from a neon company called Toray.
In order to buy 12K technology from Toray, the transaction was completed by an ostensibly Chinese private enterprise.
“Then we added a C1 gasket in the middle of the thrust chamber. The left and right ends of the chamber are the fuel injector and the C2 rocket nozzle respectively.
You can see the C1 gasket It is a tube wrapped around a filament with longitudinal stringers as it is also needed to provide a channel for the coolant while the gasket helps distribute the liquid hydrogen evenly around the C2 and prevents the inner shell of the C2 from occurring. Move.
The advantage of this design is that it decouples the thermal load from the pressure load carried by the shell, greatly reducing the risk of a hydrogen pop
Because everyone needs to know that if the chamber is a single shell or a monolithic shell, it must withstand both pressure and temperature loads
According to supercomputer calculations, such chambers would last much longer than conventional metal chambers, which often fail due to thermal loads. These thermal loads are caused by the large temperature differences in the system, from the low temperatures of the oxidizer and fuel to the high temperatures of the combustion process. Even if it uses liquid hydrogen, its lifespan can be launched at least 10 times.
In addition to using C2 material on the inner shell, we also use it for transpiration cooling."
After the day's meeting, while having dinner in the cafeteria, Lin Tianmin asked: "Boss , do you understand? "
Yang Jiashan shook his head: "I can only say that I roughly understand Guangshen's design ideas, but if you say you understand, you really don't understand.
I guess I will have to take the materials with me when I go back to understand the meaning of each term, and which rockets were designed in this way in the past.
Even if there is no rocket designed like this, at least look for similar conceptual designs from NASA.
Otherwise I feel like I am completely confused.
This design idea is too crazy. After listening to it, I felt that if it didn’t explode, I was completely counting on C2’s new materials.
Although many new designs are used, whether it is evaporative cooling or internal and external load separation, the fundamental reason is still trust in C2.
Before the launch, I didn’t know whether it would be successful or not. "Yang Jiashan feels that too much content has been fed into his brain today, and he needs to digest it when he goes back.
“From a thermal perspective, transpiration cooling is indeed the most efficient cooling method, providing a continuous film of coolant where needed through the microporous nature of the materials introduced by Guangshen. When using film cooling, additional cooling is maintained on the chamber walls. film layer.
But this cooling method also has big problems. Like in regenerative cooling, the heated coolant is sent to the injector head after cooling the combustion chamber, which will cause the thermal efficiency of the entire system. reduction," Lin Tianmin said.
"Yes, this is a matter of choice. According to what Guangshen just introduced, its lack of thermal efficiency can be made up for by the third-stage electric drive engine." Yang Jiashan said.
Lin Tianmin suddenly realized, "I understand, because Guangshen has been talking about the entire second-stage power system all day today, so I don't even remember that it is a composite power rocket.
Also Staying on the fact that it is a fossil fuel rocket, I have been wondering what to do about the loss of thermal efficiency caused by transpiration cooling
With the third level of electric power, this problem is no longer an issue.
This is also a shortcoming that composite power can make up for but fossil fuel rockets cannot make up for. "
"Yes, the advantages of composite rockets are definitely huge, but along with it, it is also extremely difficult.
Guangshen introduced so much today, it seems like most of the design work has been completed, but I always feel that things will not go so smoothly.
For such a ground-breaking feat in the aerospace field, it is unrealistic to launch successfully in one go.
If it hadn't exploded two or three times, I would have doubted whether we were using liquid hydrogen. "
"It's good to blow it up. Guangshen will not offend everyone because of the rocket explosion, but it is probably unrealistic for you to return to Shenhai in the short term. ”
(End of this chapter)