The military-industrial scientific research system of the academic master

Chapter 1309 What if... it's not just missiles?

"Use plasma..."

Faced with this new term mentioned by Chang Haonan, Han Chenfeng, as a plasma researcher, did not show confusion like most other people.

Instead, he quickly grasped the essence of it:

"That is, magnetohydrodynamic power generation technology..."

This sentence did not use a questioning tone, but just confirmed his own thoughts.

Therefore, he did not wait for Chang Haonan to answer, and almost immediately continued:

"Foreign research institutions and universities have built several magnetohydrodynamic power generation equipment with different principles, but they are only small-power products for verification of properties, and the technical difficulty is not high. You should not need to find someone to be responsible for it..."

Due to the difficulty in generating power generation fluids with suitable properties and high enough magnetic permeability, the magnetohydrodynamic power stations built by the United States and the Soviet Union during the Cold War were mainly based on magnetohydrodynamic-steam/gas combined power generation, that is, using coal-fired boilers or gas turbines like ordinary power stations to generate plasma, and then introducing these plasmas into strong magnetic fields for power generation.

Speaking of which, the idea is somewhat similar to Chang Haonan's use of aircraft engines to generate plasma and then use it to enhance the stealth effect.

But it is obvious that the plasma generated in this way is obviously not enough in terms of electron density and energy. Even if it is used for stealth, it can only cover some key positions at the tail of the aircraft.

As for using it to generate electricity...

The effect is of course almost as funny.

Although the power of the entire facility can reach tens or even hundreds of megawatts on paper, it is actually all calculated by fully utilizing mechanical energy, and the part that truly belongs to the magnetic fluid is negligible.

And these power stations have also unsurprisingly switched to traditional working methods after the end or interruption of research...

Therefore, if you want to truly obtain practical magnetic fluid power generation technology, the key is not the power generation part, but how to obtain enough effective working fluid in the front...

The analysis process is a bit complicated, but when you really think about it, it's just a matter of lightning and fire.

Combined with some rumors he had heard in the past, he quickly formed an idea that could be completely closed in his mind.

Han Chenfeng took a deep breath, then raised his head and looked at the window next to him-

About 500 meters away, there stood a gray high wall that stretched for several kilometers, blocking most of the surrounding sight.

But insiders basically know that the other side of the high wall is the core area of ​​Huairou Science City, where the two wind tunnels JF10 and JF14 are located...

"So... you are going to use our country's advantages in the field of detonation drive technology to use the detonation drive shock tube as the energy source of the magnetohydrodynamic generator, and use the driven gas compressed by the strong shock wave as the power generation medium to replace the high-temperature combustion gas generated in the combustion chamber of the traditional magnetohydrodynamic power generation device..."

Although Han Chenfeng has been focusing on unpopular research directions in recent years, resulting in few achievements that can be taken out, so that he can't even pass the first round of academician selection, but this does not mean that he is a slacker.

Relying only on Chang Haonan's words and the meeting place selected for the two, the correct answer was analyzed in a very short time.

Or, part of the correct answer.

"It seems that what Lao Liu said is right... The basic research of the 240th Institute is indeed solid."

Chang Haonan nodded as he spoke, and an expression of approval appeared on his face.

In fact, Liu Yongquan had not made too many comments on the 240th Institute and Han Chenfeng before, and could only say a few nice words as a routine.

But mentioning the former's name at this time would undoubtedly make the subsequent cooperation between the two sides smoother.

Sure enough, Han Chenfeng's eyes changed slightly.

However, in this kind of thing, it is better to emphasize one thing than not enough, and if you say too much, it will appear deliberate.

So Chang Haonan stopped at that point, and after a slight hint, he changed the subject and returned to the main topic:

"You are right, but my complete idea is more complicated, and it can be refined into two different branches according to the different loading platforms."

He clicked on a schematic diagram on the computer:

"The basic route is to first let the air flow enter the Laval nozzle to achieve pressure reduction and speed increase, convert the thermal energy of the gas into kinetic energy, and then introduce the outflowing gas into a Faraday channel to pre-ionize the gas under the action of arc discharge. Of course, this process is essentially equivalent to a plasma thruster, so it will release some kinetic energy. If you look at some energy conversion efficiency, you can also use this part of energy, such as blowing plasma fire Torch to melt materials, etc..."

"After the Faraday channel, the high-speed low-temperature gas is mixed with the externally introduced fuel and enters the detonation stage, realizing the efficient release of the fuel chemical energy, further improving the plasma energy in the working fluid, and finally entering the magnetohydrodynamic power generation stage to complete the equilibrium plasma power generation process, part of which is output, and the other part is used for arc discharge in the next cycle. "

Han Chenfeng stared at the schematic diagram on the computer for a while:

"So I need to determine the electron temperature, density and plasma field energy of the jet plasma, determine the most suitable working fluid gas and power generation conditions... Maybe calculate the model parameters of the entire power generation system? "

It must be said that it is really easy to discuss problems with insiders.

Because it involves the detonation section and shock tube, Chang Haonan had previously asked Jiang Zonglin and other staff from the Institute of Mechanics to assist in plasma-related research.

Although the work can be carried out normally, it always needs a push.

Unlike now, when he only showed a picture, the other party even understood what he needed to do.

"You don't need to do the model parameters for the time being. The most critical process of generating working fluid is detonation, so just leave this part of the work to the comrades here..."

Chang Haonan waved his hand:

“The additional thing you need to be responsible for is another thing, which is an alternative to the basic route.”

He clicked the left mouse button lightly, and the diagram on the computer screen immediately changed.

"Although the power generation principle just now is simple, it can only generate short pulse power with a duration of no more than 100ms. But imagine if the existing detonation section is modified so that it can send out pulse detonation at a certain period, and then the work If the gas is changed from air to a gas that is more easily ionized and recycled, then a periodic electric potential similar to alternating current can be generated like a conventional generator..."

"..."

Compared with the simple explanation just now, this time, Han Chenfeng did not react immediately, but fell into thinking after silently listening to Chang Haonan's introduction...

It’s not that there’s anything technically incomprehensible—

In fact, there is almost no difference in principle between the two solutions, but the practical difficulty at the engineering level is very different.

What really confused him was the meaning of the latter technology.

After a while, Han Chenfeng still couldn't hold back his curiosity, and Academician Chang seemed to be approachable, so he probably wouldn't be offended by one or two questions:

Check out the 16-9 book bar and see the correct version!

"But Academician Chang... Although I don't know much about wind tunnels, under the premise of the same technical level, the peak energy generated by periodic pulse detonation should be far inferior to that of a single detonation?"

Chang Haonan nodded and motioned for the other party to continue speaking.

Seeing this, Han Chenfeng breathed a sigh of relief and made sure that he had not asked a particularly low-level question, so he continued:

"But the biggest advantage of magnetic fluid power generation is that the pulse peak energy is high, which can directly transfer energy to the load without the need for intermediate energy storage components, high-speed rotating parts and high-power switches. If it only provides ordinary high-voltage alternating current, all kinds of ordinary Power stations can meet the requirements, so why use such high-cost technology?”

Chang Haonan did not give a direct answer, but asked with a smile:

"Comrade Chen Feng should know what kind of project development tasks are being undertaken here at Huairou Science City, right?"

"Of course..."

Han Chenfeng replied.

He was from the nuclear industry department, and his own confidentiality level was not low. He had been directly invited here by Chang Haonan, so of course he knew about the existence of hypersonic weapons.

"Then what kind of power supply do you think can meet the power requirements of the aircraft for a ramjet engine with a simple structure and lack of rotating parts?"

Chang Haonan was obviously in a good mood and gave up a little bit.

"Of course it's a battery or a fuel cell."

Although Han Chenfeng is not a professional in aerospace, he does not lack common sense:

"Academician Chang, you can't pass my test...On missiles, generally only the control, communication and guidance subsystems require electricity. The demand and start-up time are also limited, and the battery can fully meet the demand..."

However, Chang Haonan didn't seem to be joking:

"I'm not testing you..."

He said and looked at the watch on the wall next to him.

"What if it's not a missile?"

"..."

Before Han Chenfeng could speak again, he heard a knock on the door.

A man of his age was standing at the door of the office, wearing a public-law down jacket from the Aerospace Technology Group:

"Academician Chang..."

Only then did the visitor see Han Chenfeng sitting on the sofa, and he immediately suppressed what he said next.

"It doesn't matter. This is Director Han Chenfeng from the 240th Institute of the Nuclear Industry Group. He is here to help us with plasma-related research."

Chang Haonan explained.

The other party then continued to speak:

"According to your requirements, the waverider aerodynamic model that meets the wide speed domain requirements is already in place and can be tested at any time."

Han Chenfeng was still wondering what Chang Haonan's question meant just now, but he suddenly heard a key word that suddenly enlightened him - the requirement of wide speed range.

In other words, the other party's research goal is not... or it is not just a one-shot deal that can be used in a narrow design state.

Compared to a missile that just needs to accelerate as much as possible and then hit the target, this requirement seems closer...

A plane?