N-M Page 415
Page 415
The conference room was silent, and everyone remembered that in the picture just now, the engine of the spaceship had a blue light. Combined with the environment of the spaceship, the Hall engine was undoubtedly.
Chapter 719 Fusion Direct Injection Engine
They naturally know about the Hall thruster, but the earth's technology currently only has a thrust of 100kw/5.4N, so it's okay to send a few eggs up.
鸾鸟按5000吨计算，需要的能量=5000/（5.4/9.8）*100=909090000kw，折合为9亿千瓦。
With such a huge power supply, controllable nuclear fusion can be achieved, but the reaction device is also ridiculously large, which is the point of contradiction.
"Everyone, now that controllable nuclear fusion has been realized, the Hall thruster must be the main engine in the future."
"Professor Chen, we admit what you said, but with the current push..."
The professor didn't finish his sentence, but the meaning was clear.
"The thrust of the Hall thruster depends on the ion ejection speed and the ion density, so let's solve these two short board problems."
Chen Nuo was very domineering, but everyone rolled their eyes.
It really needs to be so easy to solve. As for the thrust of so many years of research, is it still in N?
"Ion engines essentially use electromagnetic fields to accelerate ions. We have now achieved controllable nuclear fusion and the confinement of plasma..."
Chen Nuo's voice stopped abruptly, and he stood there in a daze.
Everyone in the conference room was stunned, looking at each other in blank dismay, unable to figure out what was going on.
"Shh!"
Zhou Zhengfeng stood up gently and made a quiet gesture.
He has seen this situation with Chen Nuo several times, it seems to be some kind of epiphany!
A few minutes later, Chen Nuo smiled!
The doubts in the eyes of everyone in the meeting room became heavier.
"List……"
"Everyone, I have a better suggestion. It may solve the thrust problem of the Hall thruster's plasma thruster. If the skill is achieved, it will be easy to send the phoenix up, even if it doubles again, it will be no problem."
When Zhou Zhengfeng was about to ask Chen Nuo what he had gained, Chen Nuo spoke up.
This sound made everyone in the meeting room silent.
To be precise, he was taken aback by Chen Nuo's words.
You must know that the luan bird weighs 5000 tons, and if you want to send it up as a whole, it is simply a dream with the technology of the earth.
Even if all the engines of the phoenix are replaced with chemical fuels, the speed of such a huge monster will definitely not reach the universe's first speed of 7.9 kilometers per second, because the area is too large and the resistance is too great.
If it cannot reach the first speed in the universe, the satellite cannot break free from the gravity of the earth, so it cannot be sent into space.
But now that Chen Nuo said that a spaceship weighing 5000 tons can be easily sent up, this seems to them like a dream.
If Chen Nuo believed it, either Chen Nuo was crazy or they were crazy.
"Professor Chen, let's wash, ear, respect, and listen!"
Academician Liang Jin paused every word, almost gnashing his teeth, his face was gloomy, and he no longer had the calmness he had before.
He got angry and was just fooling around.
Chen Nuo didn't take it seriously, and said, "Let me first explain how to send the ostrich into space."
"The reason why the rocket reaches a speed of 7.9km/s is because of its size and load. The fuel cannot provide it with continuous acceleration, but nuclear fusion does not have this kind of trouble. As long as there is acceleration, even if it is 1g of acceleration, it will It’s okay to be able to push the phoenix into space, right?”
"You're right, but the premise is that you can make the luan bird fly. What's the use if you can't fly."
Liang Jin responded lightly.
Chen Nuo excitedly said: "Whether it is a Hall thruster or an ion thruster, they are essentially tossing ions. The process is to ionize the atoms first, and then blast them out with an electric field.
The current thrust is not enough, that's because the ejected ions are too small, so small that the unit is "millinewton". To put it bluntly, the thrust of a fart is greater than that. "
The corners of everyone's mouths grinned together.
Although what Chen Nuo said is the truth, isn't it disrespectful to... scientific research?
"Since the ejected plasma is not enough, let's increase the plasma concentration, so how to increase it?"
Chen Nuo looked at the crowd and asked back.
Everyone rolled their eyes in unison. If they can get it done, will they still stay in the cattle unit?
"Old Liang, where do the ions ejected by the ion engine come from?"
"Electric ionization propellants generate ions and then drive. Xenon is the current mainstream propellant, and of course there are zinc, nitrogen, iodine, magnesium, bismuth, etc."
"Mr. Liang is right. Let me ask Mr. Liang again. Now that our controllable nuclear fusion has been realized, can we use nuclear power as electricity?"
"Of course, the greater the power, the stronger the thrust. This is us..."
Academician Liang Jin suddenly paused when he said this, as if he had thought of something, the light in his eyes became brighter and brighter, and then he said: "I see, Professor Chen, your idea is really... well, I am too old to keep up It's time."
"What did Mr. Liang say, Luanniao still needs you to take charge of the overall situation, so I'm just offering ideas, and you have to come up with the specific details."
"Professor Chen, Mr. Liang, who are you two?"
Zhou Zhengfeng couldn't help asking, and everyone also looked at the two of them.
How do you understand?What do you understand?
"Professor Chen, please tell everyone, I'm afraid I'm not clear!"
"Okay, then I'll talk about it, Mr. Liang will help check for omissions and fill in the vacancies later!"
After Chen Nuo finished speaking, he looked at everyone: "Now the ions of the ion engine are ionized, so nuclear fusion can also produce ions, and we will also use nuclear fusion to generate electricity in the future;
That being the case, why do we need fusion to generate electricity first and then ionize? Can the plasma generated by nuclear fusion be used directly? "
"If we draw out the plasma produced by nuclear fusion as propellant, the speed of the nozzle can reach 20000km/s, and the weight of the ostrich is 5000 tons. lift off."
"I call this engine a fusion direct injection engine."
quiet!
The conference room was extremely quiet.
Everyone stared at Chen Nuo with shock or shock. They all forgot how many times they had been shocked since Chen Nuo came.
How did this genius idea come up?
If it can be done... No, theoretically it can be done.
Then the Luanniao can be sent up as a whole, which is much more efficient than them crossing the river by touching the stones.
pop... pop...
After an unknown amount of time, academician Liang Jin took the lead in applauding, and the others followed suit.
"Professor Chen, you are really... awesome!"
"Professor Chen, I apologize to you for my arrogance just now!"
"Professor Chen, if you had come to our project for a while earlier, maybe the framework of Nantianmen has already been completed."
……
Everyone expressed their inner excitement to Chen Nuo.
After a while, Chen Nuo pressed his hands in mid-air, and the conference room slowly fell silent.
"Everyone, don't rush to be happy, there is a huge flaw in the fusion direct injection engine."
Chapter 720
"defect?"
The cheering expressions of the crowd froze instantly.
After finally gaining hope, and now telling them that there are defects, this is like dying of thirst in the desert and suddenly discovering water, which turns out to be poisonous, what a despair.
Everyone looked at Chen Nuo with burning eyes, as if the flaws that Chen Nuo spoke in the next moment would completely shatter their hopes.
They have never been so frightened for such a moment.
"Don't be so nervous!"
Chen Nuo shook his head slightly: "The fusion direct injection engine is produced by fusion, and the fusion reactor is closed, and the high-temperature plasma is confined by magnetic confinement or inertial confinement;
But fusion direct injection directly draws out the fusion plasma, which cannot form a closure. At the moment of eruption, the temperature may be as high as thousands or even tens of thousands of degrees. At present, we do not have any material that can withstand it;
Even if all the means are used, it is still possible to melt the tail nozzle, send the ostrich to the sky, and its mission is over. Therefore, the biggest defect of the fusion direct injection engine is one-time. "
The meeting room was very quiet, and everyone seemed to be frozen.
Chen Nuo sighed secretly, the fusion direct-injection engine was good, but it made him very speechless once, and it couldn't be installed on the Qingluan.
After all, what he wants is to stop as he goes, otherwise, if he doesn't come to the world, it will be over for him.
If he could, he would no longer need to spend time researching ordinary Hall thrusters, which would save a lot of time.
In a few seconds, everyone suddenly exhaled and gasped.
The look in Chen Nuo's eyes is not good. I thought it was a big defect, but I didn't expect it to be this thing.
"Professor Chen, your joke is really not funny!"
Academician Liang Jin smiled wryly, almost scaring him out of a heart attack.
"Professor Chen, what you said is nothing serious, just a small problem."
"Well, although it is a defect, it is not considered a defect."
"It scared me to death. I thought this defect would cause the ostrich to die, but it turned out to be such a thing."
……
The atmosphere in the meeting room is much more relaxed.
Everyone's heart was as exciting as a roller coaster.
Chen Nuo was a little surprised when he saw it. Is this defect so insignificant in your eyes?
"Professor Chen, according to the size and weight of the phoenix, five ion engines are enough, and one ion engine is only a few hundred million, and five will not exceed 20 billion;
However, launching with a carrier rocket will cost nearly [-] billion yuan. Comparing the two, it is not a big deal;
Anyway, this thing is not going to land again after being sent up. When it reaches space, the ion engine will fall off from the phoenix. "
MMP, what you said is so reasonable, I am speechless.
"Okay, since it looks like this, then there is no problem."
Chen Nuo shrugged, very relaxed, and then said: "The theory is established, then there are three things we need to practice."
"First, fusion direct injection, how to combine it with the ion engine, how to bind high-plasma to make it work for us.
Second, the problem of the thermal insulation coating of the nozzle;
Third, the structural problems of the spacecraft and the problems of support points. "
Everyone was deep in thought, thinking about the question Chen Nuo raised.
Three questions, each of which is important.
The first one is the coordinated work of five super-large fusion direct-injection engines. You can't have one with a huge thrust and the others with a small thrust.
If this kind of problem occurs, it is not going to the sky, and it will roll over before it goes to the sky.
The second problem is more serious. If the vent melts in the middle of the flight, the ostrich will be directly pulled down by the gravity of the earth.
The whole Luanniao is made of Sun Gold, and the performance of Sun Gold is only deformed when hit by a medium-range missile.
It would be a great tragedy if such a huge monster fell down.
The third is a question of mechanics, because the thrust of the fusion direct-injection engine is extremely strong, and it generates great kinetic energy at the moment of eruption, while the ostrich itself is in a static state.
If the structure is not done well, the biggest consequence is that the parts of the five engines will break free from the shackles of the Luanniao as a whole, and they will go to heaven by themselves without playing with other parts of the small partners.
"Old Liang, I will leave you the blueprint of the Luanniao. Apart from the problems I just mentioned, please take a closer look at the details!"
"Ok?"