The Red Era, the Opening University Speech

Chapter 239 Airborne Doppler radar?
Three days flew by.

Li Mu was allowed to continue participating in the research only after he had stayed at home for a sufficient period of time.

Early in the morning after his vacation ended, he went directly to the Institute of Atomic Energy to check the latest research status of magnetohydrodynamic thrusters.

The problems of magnetic fluid and titanium surface conductivity modification materials have been basically solved, and current research has entered the critical stage.

First, the magnetic fluid was prepared, and then further in-depth research was carried out to produce a superconducting magnet consisting of a superconducting coil and a cryogenic container filled with cooling media - liquid helium and liquid nitrogen.

The second is to solve the ratio of materials such as metal, iron powder or silicon powder used in the magnets of the magnetohydrodynamic engine, which will also affect the performance and efficiency of the magnetohydrodynamic thruster.

Finally, there is another major technical difficulty in the development of magnetohydrodynamic thrusters – the problem of electromagnetic efficiency.

Electromagnetic efficiency refers to the influence of magnetic field strength and fluid conductivity, which is directly related to whether the final product of the thruster can meet practical standards.

If this data is too low, the power of the thrusters will be seriously insufficient, and even if the sound is very small, it will just be a sitting duck on the battlefield.

……

In the office, Li Mu listened to Deputy Director Zhang Guoying's summary of recent research and pondered for a moment.

With the help of material calculation software, the speed of solving the magnetohydrodynamic thruster material problem is actually quite fast, at least much faster than the previous speed of the Institute of Atomic Energy and Power.

But in his opinion, it was still a bit too slow.

Zhang Guoying looked at Li Mu's solemn expression, saw what he was thinking, and said, "This speed is already very fast. Our director has already gone over there to report the good news."

"The development progress over there is only slightly faster than ours. If we continue at this pace, there is a good chance that we can complete the development at the same time."

Although he didn't specify what he was talking about, Li Mu knew that he was talking about the research on atomic submarines.

Xiaguo’s first atomic submarine was researched in the mountains of Sichuan and Chongqing, and the research base was not far from Kyoto.

The research on magnetohydrodynamic propulsion is progressing very well. Naturally, Shen Zhongyi has to go over there to inform them. While learning and exchanging ideas, he also wants to make adjustments to the research on atomic submarines.

In the absence of clear breakthroughs, continuing research on traditional mechanical structures is a form of insurance.

But now it is obviously completely unnecessary, and we can just continue to rush down the road of magnetohydrodynamic propulsion.

"I know that the comrades in the institute have definitely tried their best." Li Mu nodded slightly, and then said: "It's just that I think the speed can be faster."

"How about this, let me solve the technical difficulty of electromagnetic efficiency."

"Although I have only been studying applied physics with the teacher for a short time, I still have some experience."

"Oh, then I'm a little curious. Tell me what you think?" Zhang Guoying asked quickly with his eyes shining.

Whether it is the preparation of magnetic fluid or the technological breakthrough of conductive modified materials on the surface of titanium, Li Mu has demonstrated extraordinary abilities.

Naturally, he was looking forward to directly taking on the biggest technical difficulty, electromagnetic efficiency.

Li Mu paused, then said:
"If you want to improve electromagnetic efficiency, you can only start from two aspects."

"One is to increase the magnetic flux density of the thruster. By using superconducting magnets, a stronger magnetic field can be generated, which directly increases efficiency."

"The second is to increase the conductivity of the fluid, which can be achieved by artificially sprinkling metal ions in the magnetic fluid channel or using high concentrations of acid and alkali."

"However, this method has a disadvantage, which is that it requires carrying a large amount of metal ions and high-concentration acids and bases, which will take up a lot of space."

Zhang Guoying nodded slightly after listening to Li Mu's method, but then he quickly discovered a blind spot and asked, "What is this superconducting magnet? Further research on magnetic fluid?"

Li Mu shook his head slightly and said:

"No, although magnetic fluid has the fluidity of liquid and the magnetism of solid magnetic material, it needs the action of an external magnetic field to generate thrust and propel the ship forward."

"Superconducting magnets can enhance this magnetic field for thrusters."

"The so-called superconducting magnet refers to an electromagnet with a second-class superconductor support coil that has a high transition temperature and a particularly high critical magnetic field at low temperatures..."

……

Listening to Li Mu's introduction, Zhang Guoying nodded rapidly, and finally took the pen and paper and wrote down everything he said word for word.

They have indeed considered the issue of external magnetic fields, but currently have no good research ideas.

Unexpectedly, Li Mu solved this big problem for them as soon as he arrived.

After Li Mu finished speaking, he couldn't help but said jokingly:
"I don't think it's necessary for the director to go there so quickly. With your help, maybe by the time he comes back, we'll have already developed the magnetohydrodynamic thruster!"

Although these words are somewhat exaggerated, they are the truest thoughts in Zhang Guoying's mind.

Li Mu smiled slightly and said, "You are too kind. These are just some small ideas. I still need your help to verify them."

"Okay, then let's start the research right away!" Zhang Guoying said immediately.

After saying that, he quickly walked out of the office, gathered people together, and discussed the contents of the notes he had just written down.

……

After the meeting, Li Mu immediately followed the researchers from the Institute of Atomic Power to start research work.

It was not until around 9 o'clock in the evening that we finally started the experiment.

He originally wanted to stay overnight, but unexpectedly he received a call from the Chinese Academy of Sciences.

Zhang Guoying hung up the phone, feeling a little surprised but also a little regretful.

In order to let Li Mu have a rest, Guo Mo called here personally, and his tone was quite serious, which was enough to show how much the superior hated someone's behavior of staying up late.

It’s just a pity that I can’t stay up late, because entering the experimental stage is the hardest part.

Without Li Mu's help, their progress would undoubtedly be much slower.

But even so, Zhang Guoying still followed Guo Mo's instructions and let Li Mu go back to rest first, no matter what nice words he said.

……

After returning home, Li Mu went to the study.

Of course, he was quite dissatisfied with the fact that Guo Mo called him at the forefront of his research.

But considering that if I insist on having my own way, my research time will inevitably be strictly restricted, I have no choice but to obey and come back first.

Fortunately, this does not affect his continued research.

Picking up a pen, he began to design the follow-up research plan on the manuscript paper.

There are three main technical difficulties in superconducting magnets:
First, there is a lack of superconductors with higher critical temperatures suitable for applications;
Second, the safety and reliability of superconductors;
3. Shielding current effect and AC loss.

Solving these three problems is not an easy task and requires a lot of time, so she has to make every effort to do it.

……

Two hours passed. Just as Li Mu was finishing up the follow-up plan, a message alert sound suddenly rang in his mind.

Open the chat page.

Ask:
"Li, I have been doing what you said during this period, and it really works!"

"After I gave her the things, she really didn't bother me for a long time!"

"But I think she still has some ulterior motives and is coveting the handsome me. So I plan to make another effort and go directly to her dormitory to express my love again. This time I will definitely be able to completely cut off my relationship with her!"

After seeing the message, Li Mu couldn't help but slowly type a question mark.

Something is wrong. Shouldn't that girl like Ask? Why didn't she succeed?

After such a long time without any news, he thought that they had fallen in love.

He quickly asked, "Wait a minute, how are you going to confess?"

"I watched your previous confession video on a video site. You prepared flowers and candles all over the floor, and even taught yourself a greasy love song. This will definitely make her lose interest in me completely. Battle jpg." Ask replied.

After being in this era for such a long time and experiencing so many things, Li Mu has kind of forgotten what content he had posted on video websites before.

But it is not important.

The important thing is that Ask must be stopped!
Li Mu advised earnestly: "I don't think you are ready yet. Why don't you wait a little longer until you are completely sure?"

If he really gave up all hope on this girl with Jianqiao, then Ask would have to devote himself wholeheartedly to that little enemy spy.

This is obviously not a good thing.

"It's okay. I think there's great hope. I've already sent a message asking her to come down. I won't say any more. I'm going up now!" After Ask replied, there was no more news.

Seeing this, Li Mu shook his head helplessly.

It seems like it's time to start thinking about how to expose that little idiot's identity without hurting Ask's heart.

……

The next day, early.

After getting up, washing and exercising, Li Mu went to the Semiconductor Research Institute.

The advancement of magnetohydrodynamics is urgent, but the research here cannot be put aside.

After visiting several software development groups, semiconductor camera development group, and Type 02 computer development group in turn, it was noon.

This is the case when there are no major problems in the research and he does not need to take action to solve them. He only needs to let go of them. Otherwise, it will take even longer.

After finishing all this, he went to the radar subsystem research laboratory again and found Jiang Nanying, deputy director of the Radar Research Institute, who was debugging a new Doppler radar.

It just so happened that the latter had just completed a new round of debugging and was preparing to go out for dinner.

So the two of them immediately went to the cafeteria together.

……

After finishing the meal, Jiang Nanying sighed at Li Mu's appetite and asked curiously, "Advisor Li, you didn't come to see me just to have a simple meal, did you?"

"Well, Director Jiang has a keen eye." Li Mu nodded, and then said: "Now that the new Doppler radar is successful, I want to continue to develop lightweight pulse Doppler radar."

"Lightweight pulse Doppler radar, are you talking about airborne Doppler radar?" Jiang Nanying was stunned for a moment, then asked back.

Airborne Doppler radar was invented in 45. It is characterized by light weight, miniaturization and multifunctionality. It is mainly used on aircraft and forms an autonomous dead reckoning Doppler navigation system with the onboard heading equipment and navigation computer.

In this area, Emperor M's technical level is far ahead of theirs.

"That's right, but its application areas will be broader. It can have all the functions used in airborne early warning, airborne interception, airborne navigation, ground-to-air defense, battlefield reconnaissance, D-missile guidance, etc." Li Mu nodded slightly.

The current level of airborne Doppler radar is still quite far behind that of future generations, otherwise he would not have proposed this research project.

After hearing what Li Mu said, Jiang Nanying immediately said, "Okay, then I'll go back and discuss with the director to start a research project on lightweight pulse Doppler radar!"

"I believe that with our current technological level, we will be able to produce an airborne radar that is more advanced than M Emperor and Big Brother!"

……

After getting Jiang Nanying's approval, Li Mu continued to discuss the follow-up research ideas with him.

However, he did not throw out too much information too quickly, but only strengthened Jiang Nanying's determination to research lightweight pulse Doppler radar.

The new Doppler radar has just been successfully developed, and he is now busy with the development of magnetohydrodynamic thrusters. He cannot spare much time for the time being.

There's no chance of exploding your liver.

He is being closely watched by his superiors now. If he makes any unusual moves again, it may not be solved as simply as a "punishment" of three days of vacation.

……

After finishing his meal, Li Mu rode his bike to the Institute of Atomic Energy.

I had just arrived at the institute and had not had time to catch my breath when I was dragged to the laboratory by Deputy Director Zhang Guoying.

As he walked, he said:

"Based on the idea you proposed yesterday, we have begun the development of superconducting magnets, using liquid nitrogen and liquid helium to quench the conductor so that the current can continue to flow without generating heat."

"But after the actual experiment was successful, we found a lot of problems, such as the helium leaking easily and the liquid nitrogen evaporating quickly..."

"Both problems can be solved. The most critical ones are the quenching problem and the ice blockage problem."

……

When he arrived at the door of the laboratory, Li Mu had roughly listened to the problems encountered by Zhang Guoying and others.

Entering the laboratory, the researchers inside saw the two people coming and immediately put down the experiments at hand.

"Everyone, come here, let's listen to Consultant Li's opinions." Zhang Guoying clapped his hands, and everyone in the laboratory immediately gathered around.

Obviously, they haven't found a good idea to continue the experiment yet.

After everyone came over, Li Mu pretended for a moment, then said:

"We can solve the problem of helium leakage by strengthening the seal and ensuring the vacuum inside."

"Liquid helium is consumed too quickly, so it only needs to be refilled regularly, but it must be demagnetized before refilling."

"As for the quenching problem and the ice blockage problem, the former is because the coil releases a large amount of energy during the superconducting process, which causes the coil to be damaged, and the latter is because the temperature of the liquid helium is low, and the filling of liquid helium is carried out at room temperature..."

Thanks to the book friend "shushuren-yes" for rewarding 2500 points
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(End of this chapter)