The military-industrial scientific research system of the academic master

Chapter 1289 Plasma Invisibility

Although this question was asked by Jiang Zonglin, after hearing Chang Haonan's answer, Xing Muchun's reaction was even more intense:

"Improved by an order of magnitude?"

Although the air-breathing and gliding hypersonic missiles themselves have not yet entered the real design stage, in the early demonstration and simulation tests of the verification missile, the high-energy particle flow used to offset the plasma sheath while cooling down and reducing drag They are all carried by the flying body.

An increase in intensity by one order of magnitude is equivalent to an order of magnitude increase in the efficiency of generating ions.

Whether it is using a special self-sweating surface material like the demonstration bomb, or directly carrying ionic liquid and atomizing it like the wind tunnel model in front of you, it is difficult to achieve this somewhat exaggerated goal.

However, Chang Haonan's expression remained as usual:

"In the current testing stage, it is temporarily achieved by using a higher concentration of ionic liquid and a larger spray dose. This is also the most efficient method and basically does not require any changes to the existing testing hardware."

In principle, the high-energy ion flow generator in the wind tunnel is just a water pipe connected to an atomization device. Since there is no need to consider the storage problem, as long as the valve opening and atomization intensity are increased, it can almost be said that the As much as you want.

There really is no need to make any changes.

The next set of tests can even be carried out in two hours.

Obviously, Chang Haonan had already made preparations for the current situation.

But Xing Muchun still felt a little unsure:

"Then on the live ammunition..."

"Of course it is impossible to use this method on live ammunition... The full-range flight time of the air-breathing superb is about 15 minutes. If you completely rely on ionic liquid atomization to provide the particle source, the total amount of liquid to be consumed will be several times at least. Starting at 100 kilograms, unless the warhead is completely dismantled, it is impossible to have enough load and space. "

Chang Haonan put his hand away, touched his chin and thought about something, and replied:

"My current plan is to continue to use spontaneous perspiration cooling materials similar to those on the surface of the verification projectile... However, in addition to cooling and drag reduction, there is also an additional requirement to weaken the plasma sheath, so the perspiration material must change. It can ionize at a temperature of about 5000K and under certain external conditions to generate plasma that meets our requirements. "

"On the other hand, it is also necessary to use some liquid or gas, but the main function is not to serve as an ion source, but to guide the flow of externally generated plasma to improve the accuracy of sheath weakening. It is best to select the frequency like a fighter radome. It can specifically transmit radar waves containing a certain frequency characteristic, rather than indiscriminately transmitting all electromagnetic signals within a certain frequency range."

“…”

“…”

Even considering that the proposer was Chang Haonan, this idea was indeed too exaggerated, so much so that the twenty or so technicians around him, including Xing Muchun, all looked dumbfounded like puppets on strings. .

After a while, Jiang Zonglin gradually came back to his senses and asked while stroking his chest:

"There are quite a few substances that can ionize at a temperature of 5000K, but those that can also be used as coatings... I'm afraid it's not easy to find, right?"

Chang Haonan nodded:

"That's why I just said that a certain external environment is still needed... Based on past research and basic physical theory, dielectric barrier discharge technology combined with high-energy radio frequency electrodes has the potential to achieve this requirement."

The so-called dielectric barrier discharge means that when there is a potential difference between two conductors at different potentials and deployed on the surface of an insulating material, a discharge occurs through tiny defects on the insulating material. Ideally, it can even occur at normal temperatures and pressures. Generate a large number of micro-discharge channels.

Although the working life is very short and can often only be counted in minutes, even a gliding hypersonic missile with tens of thousands of kilometers will only fly for about an hour at most, and the time required for the guidance radar to work is even shorter, so it is not a big deal. Unacceptable flaws.

"In addition, considering the working characteristics of the scramjet engine, the simpler combustion jet technology can actually be used on hypersonic missiles. The only problem is that the plasma source generated by this technology can only be set near the tail of the flying body, and It is still open, and it is difficult to transition to the head position evenly..." When he heard this, Xing Muchun, as the deputy chief engineer, had already begun to think about which relevant units he should contact in advance after returning from this trip to ensure Chang Haonan's safety. The research and development plan was successfully launched.

Electronic Technology Group is definitely indispensable, and considering the particularity of the plasma generation process, I am afraid we will have to deal with the nuclear industry...

Fortunately, the hypersonic project can now be said to be the No. 1 military-prefixed project. Coupled with the influence of Chang Haonan's name, it may not encounter too much resistance.

Thinking about it carefully, I was actually a little excited.

Although Lao Xing has participated in the research and development of several key rocket models before, he has never had this kind of experience in mobilizing most of the national defense industry system single-handedly...

Compared with Xing Muchun, who has already begun to think about the next specific work, Jiang Zonglin, who is only responsible for wind tunnel testing, does not need to think so much.

But precisely because of this, we have more opportunities to let our ideas fly.

"etc…"

A flash of light flashed through his mind—

This technology...if it is not used to weaken the plasma sheath, but actively stimulates plasma on the surface of the aircraft, can it achieve a certain stealth effect?

The moment this idea popped into his head, Jiang Zonglin even saw the National Science and Technology Progress Award and the title of academician waving towards him.

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In terms of objective conditions, the Institute of Mechanics is absolutely capable of carrying out relevant research.

If some results can be produced by then, even if the fundamental technology is still proposed by Chang Haonan, the innovation in the application field will also be innovation...

However, before he could figure out whether to express this idea, he heard Chang Haonan, who had just taken a drink of water, continue:

"Actually, this technology can also be applied on ordinary aircraft or spacecraft to achieve partial stealth effect..."

Comrade Lao Jiang, who was immersed in his dream, froze completely.

Yes, it turns out that people have thought about it a long time ago.

"Then...should we contact our comrades in the aviation industry?"

"Don't rush this yet."

Chang Haonan waved his hand:

"The hypersonic vehicle itself will generate a layer of plasma sheath. We only need to weaken this naturally formed sheath at a specific location and in a specific way, and we only need to weaken it for a short time window. This is already difficult to achieve. ”

"Plasma stealth requires the formation of a uniform and complete plasma layer directly on a normal surface... Although it is theoretically feasible, if you want to form an application plan, you still have to wait until the next step of research is completed and more accumulated We will consider it after the data..."

Having said this, he suddenly breathed a sigh of relief, and then changed the subject:

"Forget it, it's still too far to think about this now. Let's prepare for the next round of wind tunnel testing to see if we can achieve the results we want..."

(End of chapter)