Chapter 1354 Electromagnetic Energy Emission System
For Han Chenfeng, who was born in the research on plasma theory, the concept of surface layer suction is indeed a bit unfamiliar.
Fortunately, its principle is not complicated, it is nothing more than removing low-energy fluids that may cause separation in advance, or at least delaying the conversion point of near-wall flow from laminar to turbulent flow, thereby reducing losses.
It was first used by Chang Haonan in the turbofan 10 engine to improve the boost efficiency of the compressor.
Although the power generation channel of the magnetic fluid generator in front of us is not an impeller machine, the design method is still the same.
It took Chang Haonan only a few minutes to explain the whole process to the other party.
Han Chenfeng thought for a moment, then simply took off the insulation layer on the surface of the power generation channel and gestured a few times on the wall:
"In this case, except for the electrodes on the inner wall of the power generation channel, we must In addition to making modifications, a corresponding structure is required to safely discharge the extracted gas..."
Compared with the complexity of the end surface of the compressor blade, this horn-shaped power generation channel is generally narrow in front and wide in the back. It's so simple that it can't be simpler.
So Chang Haonan had already conceived a general design plan while thinking about the solution.
He took a pen and drew a simple cross-section diagram of the power generation channel: "If you consider more complex situations later, just for your verification device, the suction electrode can be Designed as a conductive flat plate with a cavity, a through hole connected to the lower power generation channel is provided on the outer edge part, and an inclined deep groove is cut at the bottom of the cavity close to the intake end as a suction channel, and the exhaust cover plate is directly made It is a flat plate with exhaust holes and vacuum flange, and the two are bonded to form a vacuum cavity..."
Han Chenfeng was a little confused about the operation process of this electrode at the beginning, but when he saw it assembled of After the structural diagram, he instantly showed an expression of sudden enlightenment: "The gas extracted is not necessary to waste. You can connect a corrugated pipe to the outlet of the exhaust hole and directly send it into the exhaust connection section. , let the rare gases and some plasma still remaining in it participate in the next cycle..."
"I immediately contacted Comrade Li Ziyin, who was responsible for the structural design, and asked him to recalculate the design of the power generation channel Parameters, see if other additional structural modifications are needed... If the margin is sufficient, then in-situ improvements are made on this power generation channel..."
This is a groove and hole operation, which will inevitably have an adverse impact on the structural strength. The power generation channel is the main load behind the detonation drive section and needs to work under high temperature and high pressure.
So before any improvement is implemented, it is necessary to ensure in advance that the equipment itself can operate safely.
Chang Haonan was not ready to intervene in more specific development work, so after listening to Han Chenfeng's plan, he just added: "About the specific parameters of the suction groove, you guys The nuclear industrial system may not have had this experience before. I asked Lao Liu to send several technical backbones from the 606 Institute to support him, but your progress is faster. Their time is tight and the task is heavy, and their manpower is very tight..."< br>
Although China has invested a lot of energy and resources in education over the past decade, technicians are not industrial products that can be mass-produced. Among them, there are very few who can stand alone and can only pass. The screening method of washing sand in the big waves ultimately leads to the demand for technological development and industrial expansion far exceeding the speed of talent cultivation.
At least for Chang Haonan, no one was available compared to the turn of the century, so that there was more situations in which a person had to take multiple positions.
Hearing that he could get extra support, Han Chenfeng looked happy and immediately promised: "Don't worry, in the process of building this principle verification device, the various subsystems are We have already mastered the selection of suppliers and the assembly and manufacturing process. As long as the design plan is taken out, it can be done within about a week..."
Principle verification equipment is similar to the principle prototype on Aerospace Engine. .
All aspects are highlighted. As long as you can run, it is considered successful. There is no need to consider too many specific production needs. Therefore, the cost is low and the cycle is short. Once you find that the route is not working, the psychological burden of overturning and returning is relatively low.
"Then I'll..."
Chang Haonan was about to say that he was going back to the office to call, but Han Chenfeng stopped him from behind:
"Academician Chang, there is something else to do …”
The former paused, raised his hand and said it straight:
"According to the previous plan, we will determine the feasibility of the principle of detonation-driven magnetic fluid power generation After that, the next step should be to consider the periodic potential difference in continuous work... But this prerequisite is basically impossible to achieve on the ground. Look at the hypersonic aircraft..."
At this moment, Chang Haonan felt only—
"It's numb".
This is the first time since he was reborn that he has been urged to make progress.
Magnetic fluid power generation needs to be adapted to suction-type super and scramjet engines, and he really can't take it out for a while. But the entire R&D plan was pointed out to Han Chenfeng by himself. If you tell others halfway through, you will take a break for a year or two, it doesn't seem like that...
Chang Haonan's brain was running rapidly, and soon thought of a solution to find a supplement: "Don't worry about combining it with the suction-like superb design. After all, both sides are brand new concepts and technologies, and once the risks are superimposed, there will be The possibility of losing control."
He turned his hand slowly and made a look of "Everything is in control":
"You first verify what I said and see if it is It can increase the peak power output of the device to 250MW, or at least 200MW or above. If possible, then do a round of application demonstration first... On the one hand, it is to find and solve problems that have not been exposed by the principle research process. On the other hand, it is also proved to the superior that the results of this project are worthy of the huge investment required later. "
Han Chenfeng scratched his head when he heard this, thinking that it seemed different from what he had said at the beginning. .
But after looking at Chang Haonan with a certain look in front of him, he decided not to worry about these details anymore -
Since Academician Chang made such a decision, there must be his reason.
"But application argument..."
Han Chenfeng passed all the places in his mind that needed pulse discharge in daily life, and then frowned helplessly:
> "Even if pulse discharge is required, the power curve is relatively flat in most cases, and the output time of magnetic fluid generation is too short..."
No mistakes, one song, one content, one in 6, one book, one bar, one reading!
"If additional circuits are added, the working characteristics can be adjusted, but now the medium and low power flywheel and capacitor energy storage technology is relatively mature, which is a bit too much... It's hard to say whether it has any competitiveness Ah. ”
Due to the special research direction, the Institute of Nuclear Industry 240 has rarely undertaken application-oriented projects in the past.
Although the business scope has been expanded in recent years, the shortcomings of insufficient imagination are difficult to make up for in one or two years.
"Since we are not competitive enough in the face of existing needs, we will create new needs..."
Chang Haonan has tried this routine for a long time: "If calculated based on the average power of 100MW, it is equivalent to saying that even this laboratory-level principle verification device can be used in 0.05 seconds. About 5 megajoules of energy are generated. Considering that the terminal conversion efficiency of electromagnetic energy can reach half or even higher, it can also be about 2.5-3MJ on the load end. "
"According to general rules, it is really The output capability of the engineering prototype with a scale of at least two orders of magnitude should be improved to reach the level of 200-300MJ... This number is not easily achieved by a flywheel or capacitor."
Han Chenfeng looked in front of him Liang:
"Electromagnetic energy weapons...such as electromagnetic cannons?"
The upper limit of the kinetic energy of a chemical energy cannon is basically around 25-30MJ. If it can be increased by 10-12 times at a time, it will obviously be very attractive to the army.
"Uh... that's OK."
Chang Haonan nodded reluctantly:
"But for real weapons, the preparation time for the detonation drive is ready for real weapons. Still too long... I just glanced at your test process. The ideal preparation time in full automatic mode is two minutes. Even if you use 6-8 sets of detonation sections to drive the same power generation channel in turn, you can only do it at most. The preparation time is compressed to 15-20 seconds..."
"This launch frequency may be enough for battleships, but modern artillery cannot tolerate such a low rate of fire. Besides, the range can be increased by increasing the initial speed alone The cost ratio is very poor, and the cost of hydrogen and oxygen is high. Even if hydrogen is replaced with methane in the future, it is hard to say that it is cost-effective than a genuine missile."
Han Chenfeng thought about it and felt that the other party was right: "Then what you mean..." "Then the final goal must be the electromagnetic catapult on the aircraft carrier... Of course, the verification stage It can be temporarily called "electromagnetic energy emission system" and other insensitive names."
Chang Haonan finally clarified his own ideas:
"Especially nuclear-powered aircraft carriers, hydrogen and oxygen can It is produced directly by reactors, and the frequency of ejection once every 15-20 seconds is almost twice that of steam ejection... Our country actually started pre-research on this technology very early, but it was still impossible to be practical because of the lack of high-standard energy storage components. And our plan just happens to get around this obstacle.”
"If you want to talk about the disadvantage, it is that the combined volume of multiple detonation segments is definitely larger than that of capacitor energy storage, but for aircraft carriers, this is not bad for this space..."
(End of this chapter)< br>