Chapter 1115: Nuclear-related topics?

For Chang Haonan, compared with directly using the Practice-7 satellite cluster and the immature BeiDou-1 to test the autonomous orbit determination technology, simply verifying the maximum power point tracking is obviously just a simple matter and does not require him to spend too much extra effort.

It can still be accomplished relying solely on Zhang Weiyong and others.

More importantly, the risk is very small and will not affect the mission payload of the constellation itself.

Meng Zhizhong originally wanted to try to create an opportunity for his colleagues who failed to be elected as academicians this time. Although it now seems that the launch into space will be delayed for a few years, considering the actual situation, the efficiency of the test will be higher if it is reflected in the final test.

Both parties are naturally happy.

And just at this time, Lu Yongxiang, Xu Dikuan and others who had just left also returned to the conference room.

"Comrades."

Considering that the president of the Academy of Sciences has been speaking just now, it is time for the Academy of Engineering to show up.

As Academician Xu took the stage, the conference hall, which had been a little noisy just now, quickly calmed down again.

"The relevant matters for the certificate awarding ceremony have been prepared. Comrades, please follow the guidance of the staff and move to the auditorium..."

Chang Haonan, who was sitting in the front row, could feel the air behind him almost frozen at that moment without even looking back.

After all, in principle, only after obtaining the certificate can one be considered an academician officially recognized by the organization.

Although few people would actually pay attention to such details, people still need a sense of ritual.

Perhaps that is why everyone showed such high enthusiasm.

In just a few seconds, a large number of people stood up in the conference hall.

In fact, Chang Haonan also wanted to go out quickly, but he had no choice but to sit in the first row. As this was a side hall, there was no side door, so he just glanced at the dark situation behind him and put his butt back down after half raising it.

However, to outsiders, this behavior appears to be a sign of a mentality as stable as a rock.

Especially Academician Lu, who had always admired Chang Haonan, praised him in his heart.

"Academician Chang."

After thinking for a moment, he went straight to Chang Haonan and sat down again:

"After the certificate awarding ceremony is over, don't rush to leave..."

"???"

In fact, it was not difficult to hear when Lu Yongxiang was on the stage just now that he spoke with a Zhejiang accent, so he would deliberately slow down his speech when communicating with people.

But even though he knew this was the case, this opening move that was similar to "Don't leave after school" still made Chang Haonan almost unable to hold back his laughter, and he had to use a lot of effort to suppress his laughter.

"Academician Qu and I have some business matters that we would like to discuss with you. Of course, we can also deepen our understanding of each other..."

This surname is not very common. Chang Haonan briefly recalled it and only remembered Academician Qu Liangsheng who had asked him a question before.

It’s just that he had never had any contact with these two before.

Moreover, one is a master in the field of mechanical fault diagnosis, and the other is an expert in fluid transmission and control. It seems that they have no direct connection with the projects at hand...

However, since it was the president of the Academy of Sciences who had spoken, Chang Haonan still agreed.

As a result, he was a little absent-minded during the certificate awarding ceremony due to curiosity.

Fortunately, there were more than a hundred people, and even if they went on stage in batches, the schedule was very tight, so no one noticed this.

Compared with the previous symposium, the certificate awarding ceremony was much more lengthy due to the involvement of leaders at multiple levels.

By the time the ceremony was over and we had lunch, it was already two o'clock in the afternoon.

Since Academician Lu did not say anything more specific at the time, Chang Haonan had to wait at the entrance of the Great Hall.

But soon, he found that the place he chose didn't seem very good...

After saying hello countless times to his colleagues who were also about to leave, Chang Haonan, who was thirsty, finally heard a familiar voice coming from behind him:

"Academician Chang!"

He turned around and saw Qu Liangsheng coming down the stairs not far away.

Next to him, there was a staff member supporting his arm——

The other party is 72 years old and has been working on the front line for many years, and his health has not been very good.

After walking closer, Qu Liangsheng continued:

"President Lu was just called away by his superiors. It seems that they want to discuss some policy issues... He told us to wait inside the hospital first. He should be there soon."

The Academy of Sciences is not just a spontaneous association of high-level scholars, but also the country's highest-level advisory body in the field of science and technology.

As the dean, it is normal for Lu Yongxiang to participate in discussions and even decision-making in the policy-making process.

"it is good."

Chang Haonan was about to nod, but stopped:

“Science of Sciences or Engineering?”

This question stunned Qu Liangsheng, who had just stopped walking.

He then realized that although Lu Yongxiang was the president of the Academy of Sciences, the three of them together had a total of five academician titles.

If we really want to talk about a common identity, it’s actually in the Academy of Engineering…

"I forgot that you are also an academician of both sides..."

Qu Liangsheng shook his head helplessly, and then said in a half-joking tone:

"This time, I've become a drag..."

Chang Haonan took advantage of the situation and stepped forward, ready to help Qu Liangsheng up with his other side:

"It's just a different division of labor. There's no such thing as lagging behind..."

However, the latter managed to break free along with the staff next to him:

"Alright, alright, Xiao Liu, just go and drive first. I'm not so old that I can't walk... If you two were to hold me like this, people would think I was taken away for some mistake..."

After finishing adjusting the tie around his neck, he continued:

"Dean Lu didn't say it just now, but there will be a car leading the way, so we just need to follow..."

……

From the Great Hall to No. 52 Sanlihe Road, you don’t even have to turn.

Just go west along Chang'an Avenue and Fuxingmennei Street and you will arrive.

The total distance is only about two kilometers.

So, not long after, Chang Haonan and Qu Liangsheng were already sitting in a conference room of the Academy of Sciences.

And Lu Yongxiang did as he said, not making them wait too long, and soon came back exhausted.

"I'm so sorry... I took the initiative to propose a meeting, but I ended up leaving you two here..."

He took off his coat and apologized to the two of them.

Of course, no one could really blame him for such a small matter.

So the three of them quickly got to the point.

"Academician Chang, during the academician selection stage, I read the materials you submitted... One of them said that you have already applied electromagnetic bearing technology in actual projects?"

Lu Yongxiang went straight to the point.

At this moment, Chang Haonan seemed to understand a little.

Electromagnetic bearings are necessary supporting elements in future ultra-high-speed rotating machinery, and the other party's main focus is on fluid transmission, which just needs this type of equipment.

"Yes, we do have applied research in this area."

He replied:

"However, as for specific projects, it is currently only used on a jointly developed foreign engine, and there is a mechanical backup, which is mainly used to collect user data, so it has not been used on our own models yet."

"So that's it..."

Although Lu Yongxiang's tone was calm, judging from his expression, Chang Haonan's answer actually made him feel a little surprised:

"I wonder if Academician Chang could tell me how you solved the problem of rotor life caused by excessive load during ultra-high-speed rotation?"

In fact, the research on electromagnetic bearings itself is already quite mature.

But it's still an accessory.

Just because a bearing can support tens or even hundreds of thousands of revolutions per minute does not mean that the equipment carrying the bearing can also do so.

In particular, since electromagnetic bearings have no rigid contact, they are bound to have more serious gyroscopic effects and vibration interference. Moreover, at ultra-high speeds, the rotor needs to pass through multiple critical zones within the operating speed range, and the control logic is more complicated than that of traditional bearings.

No wonder Academician Lu is so anxious.

However, Chang Haonan smiled bitterly and shook his head:

"It's not inconvenient because we didn't solve the problem at all..."

"Ok?"

"what?"

The two academicians opposite were shocked at the same time:

"Then how did you pass the life and reliability tests..."

Seeing this, Chang Haonan quickly explained:

"We chose electromagnetic bearings simply to provide some power and reduce the number of parts..."

"So, SeA650 actually only has one pivot point, which is the outermost fan that uses an electromagnetic bearing... Academician Lu should know something about this. The speed of the fan is much lower than that of the compressor and turbine, generally only a few thousand revolutions per minute, and may be even lower under cruising conditions, so there is no pressure on the radial load..."

Hearing this answer, Lu Yongxiang and Qu Liangsheng's eyes dimmed for a moment.

However, it soon returned to normal.

After all, they are all big names at the academician level, and it is impossible for them to simply rely on others to give them ready-made things.

"This is the situation."

This time, it was Qu Liangsheng who spoke:

"President Lu and I are currently researching electromagnetic bearing-flexible rotor systems that are compatible with ultra-high-speed rotating equipment. However, Jincheng's hardware and software foundations in this area are relatively poor... If we build from scratch, it will definitely consume an inestimable amount of money and time, so I was wondering if I could cooperate with Academician Chang and make use of your group's existing experience and testing platform..."

Chang Haonan is very familiar with this kind of operation.

It’s just that before, it was usually initiated from his side.

"Ultra-high-speed rotors... If we plan to fully use electromagnetic bearings on the next generation of aircraft engines in the future, there is indeed a demand for them..."

After thinking for a moment, he slowly said:

"But I want to know, what applications did you two originally intend to apply this research to?"

Lu Yongxiang and Qu Liangsheng looked at each other.

"Ultra-high-speed centrifuge... or to put it more directly, it is to extract highly concentrated nuclear fuel!"