Chapter 1216 Magnetic fluid power generation?
A few days later.
Chang Haonan, who has returned to Haojing, walked into his temporary office in Haofei Group as usual.
In fact, at his level, there is no longer a requirement to check in regularly.
It's just that he has been in the capital for more than a month, which has caused Haojing to accumulate a lot of things that need to be dealt with.
According to his schedule, he needs to go to the Sixth Academy to attend a regular meeting in the afternoon, so he plans to finish all today's matters before noon.
However, God did not fulfill his wish.
Before Chang Haonan could turn on his computer, he saw Lin Yuanyi, the office director of the hypersonic weapons project team, appearing in the corridor outside, raising his hand and knocking on the door lightly:
"Academician Chang, this is the research and development progress report sent from the Institute of Mechanics. Look..."
The former looked up at the perpetual calendar hanging next to him and realized that it was indeed the end of the quarter when the progress report was routinely submitted.
This also means that in the next few days, about a dozen similar documents will be submitted.
"Put it on my table."
Chang Haonan sighed secretly in his heart, but still pushed the laptop aside and took out the ballpoint pen from the pen holder.
The superb project is one of his most important things at the moment and must be dealt with first.
Soon, a plastic folder with a black cover was placed in front of Chang Haonan.
Only then did he realize that even by the standards of a quarterly report, the thickness of this thing seemed a bit exaggerated.
At first glance, it seems to be dozens of pages larger.
Lin Yuanyi obviously also saw the shock in Chang Haonan's eyes:
"Researcher Jiang said that they encountered a strange situation during this period... Although the superficial problem has been solved, the underlying cause has never been discovered..."
"Huh?"
The latter's expression turned curious, and he nodded while opening the folder:
"I understand... Also, please remember to reply to Researcher Jiang and tell them that I will contact them as soon as possible..."
After finishing speaking, he lowered his head and focused on the content of the report in front of him.
Lin Yuanyi didn't answer when he saw this, and quietly exited Chang Haonan's office.
Before leaving, I didn’t forget to take the door with me...
……
"The effective operating time fully reached the design specifications and successfully achieved normal operation under a wide Mach number range..."
"In order to reduce construction costs, the unequal straight flow design method is used in the parameter design process of the stable section to meet the flow requirements, so that the inner diameter of the high-pressure pipeline upstream of the stable section is smaller than the nozzle throat size..."
"The inverse characteristic line method used in the design process of the exchange-throat nozzle successfully solved the problem that the traditional design method cannot improve the uniformity of the flow field when used in the design of the exchange-throat nozzle..."
"..."
In general, although some difficulties were encountered during the construction process, the progress of the Institute of Mechanics is still much more optimistic than expected.
In particular, the first ignition of the drive section was more than two months ahead of schedule.
This still makes Chang Haonan very happy——
As for the superb verification missile, due to the participation of the Second Academy of Aerospace Science and Industry, the warhead re-entry accuracy has been greatly improved, so the test launch time is likely to be advanced from the beginning of 2007 to the first half of 2006.
If the JF16 wind tunnel can be put into use in advance accordingly, then the entire project can enter the waverider body in advance, and even the scram stamping research stage in sync with the United States.
Thinking of this, Chang Haonan's movements of turning pages and making marks became brisk.
But not long after, he saw the "strange situation" that Lin Yuanyi just said.
"The calculated total airflow temperature and the actual temperature parameters obtained by the temperature measurement probe are about 10% lower than the initial calculation results, but there is no deviation in the airflow velocity and pressure, which almost completely corresponds to the theoretical calculation results..."
"As the detonation energy continues to increase, the total temperature of the airflow will also increase accordingly, but the two are not proportional, and the higher the energy, the greater the total temperature is lower than the calculated value..."
"..."
Jiang Zonglin's text description is a little abstract, but fortunately he attached all 17 experimental data from the beginning to yesterday, and listed the most critical total airflow temperature in a separate table.
In the end, the Institute of Mechanics adjusted the parameters of the detonation drive section and the auxiliary detonation section to allow the total airflow temperature to exceed the 8000K mark. At the same time, it changed the size of the drive section outlet to maintain the corresponding airflow speed at about 6200m/s. .
As for the non-linear problem between settings and results, we directly repeated multiple experiments and made a comparison table.
In short, the initial design requirements were achieved in the project.
It will be sufficient for hypersonic research within a few years. However, the Institute of Mechanics has never found a theoretical explanation for this phenomenon.
Jiang Zonglin also attached his calculation steps at the end of the report, hoping that Chang Haonan would verify whether there were any errors.
The latter did the calculation himself and determined that there were no major problems with the whole process, except for some initial parameter setting issues that would not affect the final result...
"The total temperature is not enough..."
Looking at the calculation results in front of him, Chang Haonan narrowed his eyes slightly, feeling a little confused.
The analytical solution to the second-order C-J equation has been double certified by the system and his own many calculations, and there is almost no possibility of error.
Moreover, if there is a problem with such a low-level part, then the working condition of the entire detonation drive section should be in chaos. It cannot be as tight as it is now, and only the total temperature data does not match.
"Since the theory is correct, it can only be an engineering or operational problem..."
While muttering to himself, he turned the file back to the "Basic Settings" section at the beginning of the experimental section.
After looking over it twice, a bold guess suddenly jumped out of my mind...
Chang Haonan grabbed the red phone on the table. At first, he wanted to call Lin Yuanyi, who had just delivered the documents, but he changed his mind after dialing a few numbers.
What he wants to say does not involve specific data, and you can contact the Institute of Mechanics directly using the confidential line.
After a beeping ringback tone, the phone was connected.
"Hello, this is the Institute of Mechanics, Academy of Sciences."
Although there was some unconcealable exhaustion in his voice, Chang Haonan could still tell that it was Jiang Zonglin he was looking for.
"Researcher Jiang, I am Chang Haonan."
There was a slight crashing sound from the receiver, as if the person who was sitting suddenly stood up and accidentally knocked something off.
"Academician Chang, you said."
"I have just read the report you submitted."
Chang Haonan cuts to the chase directly:
"Let me confirm, you are currently only testing the detonation drive section itself?"
The sudden question made Jiang Zonglin on the other side a little confused. After a few seconds, he spoke in confusion:
"Yeah...that's right."
"What simulation load did you set at the position where the driven section and the nozzle should have been?"
Chang Haonan continued to ask.
At this time, Jiang Zonglin was almost completely awake and immediately replied:
"A gas circulation facility... Some high-purity rare gases need to be used during the wind tunnel work. We cannot produce this stuff in China yet. The import price is very expensive and the supply is limited, so during the test we collected Get up and cycle.”
After finishing speaking, he tentatively asked:
"Academician Chang, have you... figured out the cause of the problem?"
"Hoo——"
The moment he heard Jiang Zonglin's answer, Chang Haonan breathed a sigh of relief——
Just in line with my previous speculation.
Of course, scientifically speaking, this alone doesn't prove anything.
So, he quickly told:
"I'm not 100% sure yet, but I already have some clues... Now you can dismantle the circulation device, replace it with a simulated load, and then conduct another experiment using the initially calculated set of parameters!"
This request was obviously beyond Jiang Zonglin’s expectations:
"This..."
Seeing that he was still a little hesitant, Chang Haonan had no choice but to explain further:
"The main working fluids in wind tunnels are nitrogen and oxygen. The ionization potentials of these two gases are very high, so any wind tunnel in the past will almost never cause them to dissociate. However, the total gas temperature of JF16 exceeds 8000K, which is enough to generate electrons. and charged ions, forming a plasma.”
"Plasma itself has a high conductivity, and the gas flow rate at that moment is an exaggerated 6000m/s or more. Coupled with the gas circulation device you set up... Researcher Jiang, what do you think will happen to the entire wind tunnel system? Like? ”
Having said that, Jiang Zonglin immediately understood what Chang Haonan meant:
"A wind tunnel is equivalent to a generator?"
"That's right..."
Chang Haonan replied:
“And it’s a generator that uses magnetic fluid to generate electricity!”
(End of chapter)