The military-industrial scientific research system of the academic master.

a few days later.

Chang Haonan, who had returned to Gaojing, walked into his temporary office in Gaofei Group as usual.

In fact, at his level, there is no longer a requirement to punch in and out on time.

However, I have been in the capital for more than a month, which has resulted in a lot of matters piling up in Gaojing that need to be dealt with.

According to the schedule, he needed to go to the Sixth Hospital to attend a regular meeting in the afternoon, so he planned to finish all the work for the day before noon.

However, God did not fulfill his wish.

Before Chang Haonan could even start his computer, he saw Lin Yuanyi, the office director of the hypersonic weapons project team, appear in the corridor outside and knock on the door gently.

"Academician Chang, this is the research and development progress report sent by the Institute of Mechanics. Please take a look..."

The former looked up at the perpetual calendar hanging next to him, and realized that it was indeed time to submit the routine progress report at the end of the quarter.

This also means that in the next few days, about a dozen similar documents will be submitted.

"Put it on my desk."

Chang Haonan sighed inwardly, but still pushed the laptop aside and took out a ballpoint pen from the pen holder.

The superb project is one of the most important things for him right now and must be given priority.

Soon, a plastic folder with a black cover was placed in front of Chang Haonan.

It was only then that he realized that even by the standards of a quarterly report, the thickness of this document seemed a bit exaggerated.

At first glance, it might seem like there are dozens of pages.

Lin Yuanyi obviously saw the shock in Chang Haonan's eyes:

"Researcher Jiang said that they encountered a strange situation during this period... Although the surface problem has been solved, the underlying cause has not been uncovered..."

"Ok?"

The latter's expression turned curious, and he nodded while flipping through the folder:

"I understand... Also, remember to reply to Researcher Jiang and tell him that I will contact them as soon as possible..."

After saying this, he lowered his head and focused on the report in front of him.

Seeing this, Lin Yuanyi did not respond and quietly left Chang Haonan's office.

I didn't forget to close the door before leaving...

……

"The effective operating time fully met the design indicators and successfully achieved normal operation in a wide Mach number range..."

"In order to reduce construction costs, the unequal entropy 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 throat-changing nozzle successfully solved the problem that the traditional design method could not improve the uniformity of the flow field when applied to the throat-changing nozzle design..."

"..."

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 completed more than two months ahead of the original schedule.

This still made Chang Haonan very pleased——

As for the hypersonic verification missile, with the participation of the Second Academy of Aerospace Science and Industry Corporation, the re-entry accuracy of the warhead has been greatly improved, so the test launch time is likely to be advanced from the initial estimate of early 2007 to the first half of 2006.

If the JF16 wind tunnel can be put into use ahead of schedule, the entire project can enter the waverider research stage ahead of schedule, or even the scramjet research stage in synchronization with the United States.

Thinking of this, Chang Haonan even turned the pages and made marks more quickly.

But not long after, he saw the "strange situation" that Lin Yuanyi had just mentioned.

"The calculated total airflow temperature and the temperature parameters actually obtained by the temperature measuring probe are about 10% lower than the initial calculation results, but the airflow velocity and pressure have no deviation and are almost completely consistent with 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 difference between the total temperature and the calculated value..."

"..."

Jiang Zongli's description was a little abstract, but fortunately he attached data from all 17 experiments conducted from the beginning to yesterday, and listed the most critical total airflow temperature in a separate table.

Finally, the Institute of Mechanics adjusted the parameters of the detonation driving section and the auxiliary detonation section, allowing the total airflow temperature to exceed 8000K. At the same time, it changed the size of the driving section outlet to maintain the corresponding airflow velocity at approximately 6200m/s.

As for the nonlinear problem between the settings and the results, we simply repeated the experiments several times and made a comparison table.

All in all, the initial design requirements were achieved in engineering.

This is enough for hypersonic research within a few years.

However, the Institute of Mechanics has never found a theoretical explanation for this phenomenon.

At the end of the report, Jiang Zongli also attached his own calculation steps, hoping that Chang Haonan could verify whether there were any errors.

The latter calculated it himself and confirmed that there were no major problems with the entire process, except for some initial parameter setting issues that would not affect the final result...

"The temperature is not high 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 CJ equation has been doubly certified by the system and his own multiple calculations, and there is almost no possibility of error.

Moreover, if there is a problem with such a low-level part, the working condition of the entire detonation drive section should be in chaos. It is impossible for it to be as perfect as it is now, with only the total temperature data not matching.

"Since the theory is correct, it can only be an engineering or operational problem..."

While muttering to himself, he turned the document back to the "Basic Setup" section at the beginning of the experimental section.

After reading it over and over again, a bold guess suddenly popped up in 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 after dialing a few numbers, he changed his mind.

What he wanted to say did not involve any specific data, so he could contact the Institute of Mechanics directly using the confidential hotline.

After a series of beeps, the call was connected.

"Hello, this is the Institute of Mechanics of the Academy of Sciences."

Although there was a hint of fatigue in his voice, Chang Haonan could still tell that it was Jiang Zonglin he was looking for.

"Researcher Jiang, I'm Chang Haonan."

There was a slight collision sound coming from the other end of the receiver, as if the person who was originally sitting suddenly stood up and accidentally knocked something off.

"Academician Chang, please go ahead."

"I have just read the report you submitted."

Chang Haonan went straight to the point:

"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 blankly:

"Um...that's right."

"That should be the location of the driven section and the nozzle. What simulated load did you set?"

Chang Haonan continued to ask.

Jiang Zonglin was almost fully awake at this moment, and immediately replied:

"A gas recycling facility... The wind tunnel requires some high-purity rare gases during operation. We are currently unable to produce this in China. The import price is very expensive and the supply is limited, so we collect and recycle it during the test."

After he finished speaking, he asked tentatively:

"Academician Chang, have you figured out the cause of the problem?"

"call--"

The moment he heard Jiang Zonglin's answer, Chang Haonan breathed a sigh of relief.

It just happens to match my previous speculation.

Of course, scientifically speaking, this alone doesn't prove anything.

So he quickly instructed:

"I'm not 100% sure yet, but I have some clues... Now dismantle the circulation device, replace it with a simulated load, and then use the parameters calculated at the beginning to conduct another experiment!"

This request was obviously beyond Jiang Zonglin's expectations:

"This……"

Seeing that he was still a little hesitant, Chang Haonan had to explain further:

"The main working fluids of the wind tunnel are nitrogen and oxygen. The ionization potential of these two gases is very high, so any wind tunnel in the past would hardly cause them to dissociate. However, the total gas temperature of JF16 exceeds 8000K, which is enough to produce electrons and charged ions, thus forming plasma."

"The plasma itself has a very high conductivity, and the gas flow rate at that moment was an extremely exaggerated 6000m/s, plus the gas circulation device you set up... Researcher Jiang, what do you think of the entire wind tunnel system?"

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!"