From Houston's perspective, it is impossible for China to solve the strategic bomber's flight control problem in a short period of time, but in fact, even without considering Chen Nian's latest plasma device, the H-20's flight control system has already reached fully usable standards. .
After all, after more than two decades of evolutionary development, the originally complex flight control system of the B-2 has become relatively simple due to the development of electronic and intelligent technologies.
The technologies provided by the system are mature and stable, and are much more practical than B-2's technology.
Now, with the blessing of plasma devices, the mobility of the H-20 is bound to go to a higher level.
It is even possible that it will become the most maneuverable strategic bomber after the Tu-160.
No. 603, in Tang Changhong's office.
Chen Nian explained his plasma design while flipping through the information.
"The essential principle of a plasma device, or plasma jet exciter, is to generate a high-energy jet through spark discharge, which is ejected from the top of the device, thereby improving the leading edge separation flow under large-angle maneuvers."
"In this process, discharge frequency and intensity are the most important factors affecting flight control."
"So, the main problem for us in manufacturing this type of device is to determine the electrode material and power supply."
"According to my design, the plasma device should use an asymmetric layout. The insulating medium is polyimide film, the discharge electrode is made of copper foil, the width of the embedded electrode is 5mm, and the rear edge of the embedded electrode and the front of the exposed electrical appliance are Connected by fate.”
"As for the power supply, use a microsecond pulse power supply, set the half-pulse width to 25 microseconds, and the peak pulse power should reach more than 4.5MW."
"For force measuring devices, you can use a rod-type six-component balance, and the response frequency should be greater than 80Hz."
Listening to Chen Nian's words, Tang Changhong nodded repeatedly while recording.
When he first saw Chen Nian's design, he thought that the other party would only provide directional guidance. At most, it would explain the principles clearly and clarify the key points, just like he had previously provided basic technical guidance for the H-20.
But I didn't expect that this time he provided technology that was complete to the parameter level!
Finally, I can enjoy the legendary nanny-level service.
You know, during the previous manufacturing process of the J-22, he had heard Lei Gang talk about the legend about Chen Nian many times.
He has always been amazed at how such an "individual" can complete work that hundreds or even thousands of people took several years to complete, and he has always wanted to have the opportunity to see it.
But now, I finally feel it.
Although it is just a small plasma jet excitation device.
But although the device is small, it does not affect its "user experience" at all.
And this experience is really great
You don't even need to think about it, everything is just right in front of you.
The only thing to do is to build things according to the guidance of the documentation and parameters.
Isn't it possible that I can't do this little thing well?
——
Of course, Tang Changhong was not completely without doubts in this process.
Regarding the issue of discharge frequency, he repeatedly confirmed with Chen Nian many times.
But no matter how tricky or detailed his question is, Chen Nian can answer it without hesitation, and also provides some analysis of the principles.
"So in summary, if the discharge frequency is less than 70Hz, the lift coefficient of the whole machine will increase with the increase of discharge frequency after excitation is applied at a large angle of attack. If the discharge frequency is greater than 70Hz, the lift coefficient of the whole machine will decrease with the increase of discharge frequency. The aircraft lift coefficient increases the most when the discharge frequency is 70Hz."
"In this case, we also need to build an additional control system to combine with the flight control sensing device to achieve control of the plasma device."
Chen Nian finally finished explaining the entire content of the plasma device, while Tang Changhong's face opposite him had a look of sincerity written all over it.
"That's awesome!"
He said sincerely.
"Gong Chen, your skills and knowledge reserves are truly unprecedented."
"I've been in this industry for so long, and I've never met someone as exaggerated as you."
Hearing his words, Chen Nian smiled shyly, and then replied:
"This is nothing to me. If you can build the H-20 with bare hands, that's really awesome."
"After all, for such a large and complex aircraft, the process from zero to one is the most difficult."
"That's really not difficult!"
Tang Changhong quickly waved her hand.
It’s a joke, you have already mastered the key technologies, and you still say that our job is the most difficult. Isn’t that making us miserable?
"Actually, it's just some practical work. It doesn't matter whoever does it."
"The biggest contribution is from your side, Mr. Chen."
"It's better not to call me Chen Gong, just Xiao Chen."
Chen Nian interrupted.
He was really not used to what Tang Changhong called him. After all, in his heart, Tang Changhong was still the "Father of Kunpeng".
Regardless of the system's bonuses, people of this generation like Tang Changhong have always been unquestionable in their hearts.
"Forget it, Xiao Chen. Just like Lao Yang, let me call you Xiao Nian."
Tang Changhong laughed and continued:
"Xiao Nian, how long do you plan to stay here specifically this time? Are you going to be fully involved in the follow-up work?"
Chen Nian nodded and replied:
"Yes."
"From today until the H-20 test flight is successful, I will stay at 603."
"Of course, it's not because you didn't do a good job, it's because there are some other reasons. We must ensure that the H-20 completes its test flight as soon as possible and becomes combat effective."
"So, I want to help you eliminate some risks that may arise in the process by stepping in myself."
"clear."
Tang Changhong tapped her fingers lightly on the table. After thinking for a moment, she said:
"At this stage, it is indeed a period when risks and problems are high."
"In terms of flight control, with the plasma jet device, the robustness of the entire system will be greatly improved, and there will basically be no problems in the future."
"The main thing we can think of is probably the problem of the cabin structure."
"As for radar and electronics, you may still want to check with the 14th Institute. We plan to equip the H-20 with a digital array radar. It is said that they have optimized its performance."
"Then the last and most difficult thing is to change the cycle engine. The 606 Institute is making rapid progress, so I guess the problem won't be too big - they have experience after all."
After Tang Changhong finished speaking, Chen Nian pondered for a few seconds, and then asked:
"What about the stealth coating? Is there anything wrong with it?"
"The feedback from the Material Research Institute is that there is no problem - wasn't a small amount of graphene material used on the J-22 before? Now it has basically been mass-produced and will be used on the H-20."
"That's no problem."
Chen Nian let out a long sigh of relief.
If there is no water in the situation Tang Changhong said, then the follow-up progress of the H-20 project will really not be too difficult.
What you have to do is to keep an eye on the process to avoid uncontrollable risks in the future.
After leaving Tang Changhong's office, Chen Nian returned to his residence in House 603.
In the room, he again checked the accumulation of source points in the system.
The plasma jet excitation device did not consume him many source points. So far, he has accumulated 27 source points.
Moreover, the number of new source points added every day has also remained at 0.35 points.
In other words, the daily growth number of source points has reached the lower limit.
This is all the result of technological fission achieved by previously exported technologies.
On the other hand, the study of new energy materials has been basically completed, and the next step is for him to enter the real practical stage.
We are one step closer to solving the new energy problem
Chen Nian once again tried to analyze the previously optimistic Amprius lithium battery, but this time, the analyzed source point consumption has dropped to 16 points.
Compared with two months ago, the source point consumption has dropped by 4 points.
There is no doubt that this is a reward for his hard work during this period.
However, the decline of the source point should be close to the upper limit that the system can give. If you want to continue to play lower, you must continue to deepen your own learning.
But that method is not worth the gain - spending thousands of hours on research, in exchange for the result of reducing the source point consumption by another 10 points?
Then I might as well just make the Amprius lithium battery.
Thinking of this, Chen Nian subconsciously began to analyze it, but suddenly, a light flashed in his mind.
etc.
If the Amprius lithium battery dropped to 16 points, what about the metal hydrogen battery?
This thing has only existed in science fiction. Even after more than ten years, no one can make a conclusion whether it exists.
However, Chen Nian now has a simple way to confirm the possibility of its realization.
That is, use the system to try to analyze.
As the characters "Metal Hydrogen Battery" were entered into the system through Chen Nian's consciousness, the system's feedback immediately appeared.
[Metal hydrogen battery: This is a battery with extremely high energy density, and at the same time, its technical complexity is also extremely high]
[Analysis source point consumption: 1192 points. 】
1192 points!
Chen Nian subconsciously widened his eyes.
However, he was not surprised by the huge number of source points consumed by metal hydrogen batteries.
On the contrary, in his opinion, this source point consumption seemed a bit too low!
Let’s not talk about how to realize a metal hydrogen battery. The material “metal hydrogen” alone is amazing enough.
You know, metallic hydrogen is known as the "Holy Grail of high-pressure physics"!
Hydrogen is the lightest element, weighing less than 90 grams per cubic meter. The density of water is more than 9,000 times greater.
However, 1 cubic centimeter of metallic hydrogen weighs a full 1 gram, which is several orders of magnitude different from the density of hydrogen gas.
To change hydrogen from a gaseous state to a metallic state, it is very simple to put pressure on it.
But in fact, if you want to pressurize hydrogen into a metallic state, you need a pressure of at least 500Gpa.
The pressure at the center of the Earth's core is only 360Gpa.
For comparison, the pressure generated by the explosion of TNT explosive is equivalent to 100,000 atmospheres, which is only more than 10Gpa.
So you can imagine how difficult it is to prepare metallic hydrogen.
——
Even though its principle is actually not complicated.
Thinking of this, Chen Nian suddenly understood.
It is precisely because the principle is not complicated that the analysis cost of this thing is not as high as I imagined.
It is estimated that a large number of sources are still consumed in the step of turning metallic hydrogen into batteries.
So, he re-selected the analysis target and removed the word "battery".
Sure enough, the analysis consumption that the system popped up this time was only a "mere" 340 points.
It's still a lot, but compared to the number 1192, it's a lot smaller.
However, Chen Nian still has no intention of investing Source Points in this so-called manufacturing process - even if he has enough Source Points, he will not squander it so unscrupulously.
The reason is simple. The "metallic hydrogen" mentioned here is obviously just metallic hydrogen produced in the laboratory.
Its process flow is not complicated, and it has been realized successively ten years later.
The real difficulty is how to take metallic hydrogen out of the laboratory and achieve large-scale mass production.
As for how to achieve mass production.
Then there are more problems.
Manufacturing of ultra-high pressure environments, manufacturing of high-strength materials such as artificial diamonds, and carbon nanotubes used to contain quasi-one-dimensional hydrogen.
Only when all these problems are solved can the mass production of metallic hydrogen be possible.
——
Or to think about it differently, if physical methods don’t work, try using chemical methods.
But it was obvious that in the era when Chen Nian traveled back in time, chemical methods had not been explored enough at all, so he had no clue.
After thinking again and again, Chen Nian decided to spend the Source Point in his hand.
And the first technology he wants to implement is carbon nanotubes!
This thing not only has the advantage of high structural strength.
In fact, it is still an important optimization direction for the development of lithium batteries at this stage.
Carbon nanotubes themselves have excellent conductive properties. At the same time, due to their small depth and short stroke when deintercalating lithium, as a negative electrode material, they have less polarization during high-rate charge and discharge, which can greatly improve the high-rate charge and discharge performance of the battery.
In addition, carbon nanotubes can also be combined with other negative electrode materials to use their unique hollow structure, high conductivity, large specific surface area and other advantages as a carrier to improve the electrical properties of other negative electrode materials.
In other words, if Chen Nian comes up with a mature method for manufacturing carbon nanotubes, he can not only lay the foundation for the future development of metal hydrogen batteries, but can even make great strides in promoting the development of lithium battery technology now.
Kill two birds with one stone!
Thinking of this, Chen Nian did not hesitate any longer.
He looked at the source point consumption of carbon nanotube resolution in the system - only 12 points were needed.
It can be said to be of high quality and low price.
"Start analyzing!"
He thought silently in his mind.
After a brief silence, a gentle stream of data began to enter his brain.
It took him two full hours to fully grasp all the technical principles related to carbon nanotubes.
A smile appeared on Chen Nian's lips.
Before this, all the technologies he analyzed were mature technologies that had already appeared in his world.
Now, the analysis of carbon nanotubes has allowed his technical analysis boundary to cross the boundary of the "near future".
Starting from today, the entire Chinese technology will officially move towards the future.
Thinking of this, he breathed a long sigh of relief.
No one can stop our progress, not even the overlord of this world.
Things in Africa must be settled quickly. Only in this way can our technology truly have the soil for barbaric growth.
(End of chapter)
