Chapter 1115 Nuclear-Related Topics?

For Chang Haonan, compared with directly using the Practice-7 satellite group and the immature Beidou-1 to test the autonomous orbit determination technology, simply verifying a maximum power point tracking is obviously just a casual thing, and he does not need to spend too much extra effort.

Zhang Weiyong and others can still complete it.

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

And Meng Zhizhong was originally trying to give a chance to his colleagues who failed to be elected as academicians this time. Although it seems that it will take a few years to go to the sky, combined with the actual situation, the test efficiency will be higher in the end.

Both parties are naturally happy.

And just at this time, Lu Yongxiang and Xu Dikuang, who had just left, also returned to the conference hall.

"Comrades."

Considering that the president of the Academy of Sciences had been speaking on the stage just now, it was time for the Academy of Engineering to show up.

And with Academician Xu taking the stage, the conference hall, which was a little noisy just now, quickly calmed down again.

"The relevant matters of 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 this 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 go to such details, people still need a sense of ceremony.

Perhaps because of this, everyone showed a high level of enthusiasm.

In just a few seconds, a large number of people stood up in the entire 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 a side hall, there was no side door, so he just glanced at the dark situation behind him and put his butt back.

However, this style of behavior was seen by outsiders as a manifestation of a stable mentality.

Especially Academician Lu, who had admired Chang Haonan before, praised him slightly 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, don't leave in a hurry..."

"???"

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 slow down his speech when communicating with people.

But even if he knew it was like this, this opening sentence similar to "Don't leave after school" still made Chang Haonan almost unable to hold back, and he took a lot of effort to force himself to hold back his smile.

"Academician Qu and I have some business matters that I want to discuss with you, of course, by the way, we also want to 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 no 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, which seems to have no direct connection with the projects at hand...

However, after all, it was the president of the Academy of Sciences who spoke, so Chang Haonan agreed.

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

Fortunately, there were more than 100 people, and even if they went on stage in batches, the time arrangement was very tight, so no one noticed this.

Compared with the previous symposium, the certificate awarding ceremony was much more lengthy because of the high-level leaders.

After the ceremony and lunch, it was already two o'clock in the afternoon.

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

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

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

"Academician Chang!"

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

Beside him, there was a staff member supporting his arm -

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

After walking closer, Qu Liangsheng continued:

"President Lu was called away by his superiors just now, and it seemed that he wanted to discuss some policy issues... He said that the two of us should go to the academy and wait for a while, and he should be there soon."

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

As the president, it is normal for Lu Yongxiang to participate in discussions and even decisions in the process of formulating some policies.

"Okay."

Chang Haonan was about to nod, but stopped:

"Academy of Sciences or Academy of Engineering?"

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

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 common identities, it is 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 have become a drag..."

Chang Haonan took the opportunity to step forward and prepared to help Qu Liangsheng up on the other side of his body:

"It's just that the division of labor is different. There's no such thing as being too late..."

But the latter broke free together with the staff next to him:

"Okay, okay, Xiao Liu, just go and drive first. I'm not old enough to walk on the road... Being held up like this by the two of you makes people think that the old man made some mistake and was taken away... "

After finishing speaking, he adjusted the tie around his neck and continued:

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

…

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

Go west along Chang'an Street and Fuxingmennei Street and you'll arrive.

The total distance is only about two kilometers.

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

As he said, Lu Yongxiang didn't let them wait for too long, and quickly rushed back after a long journey.

"I'm really sorry...I took the initiative to meet, but ended up leaving you two here..."

He apologized to the two of them while taking off his coat.

Of course, no one could really blame him for this little thing.

So the three of them quickly got to the point.

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

Lu Yongxiang got straight to the point.

At this moment, Chang Haonan understood a little bit.

Electromagnetic bearings are necessary supporting components in future ultra-high-speed rotating machinery, and the field of fluid transmission that the other party focuses on requires exactly this type of equipment.

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

He replied:

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

"So that's it..."

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

"I wonder if it would be convenient for Academician Chang to reveal how you solve the problem of rotor life due to excessive load during ultra-high-speed rotation?"

The research on electromagnetic bearings itself is actually relatively mature.

But this is still an accessory.

Bearings can support tens of thousands or even hundreds of thousands of rotational speeds per minute, but it does not mean that equipment with bearing loads can also support it.

In particular, electromagnetic bearings have no rigid contact, so fundamentally there must be 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 traditional bearings. complex.

No wonder Academician Lu is so eager.

However, Chang Haonan smiled bitterly and shook his head:

"It's nothing inconvenient because we haven't solved it at all..."

"Um?"

"ah?"

The two academicians opposite were shocked at the same time:

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

Upon seeing this, Chang Haonan quickly explained:

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

"So, SeA650 actually only has the No. 1 fulcrum, which is the outermost fan that uses electromagnetic bearings... 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 per minute. rotation, and it may be even lower when cruising, so there is no pressure on radial load..."

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

However, it soon returned to its original state.

After all, they are all academician-level bosses, and it is impossible to just rely on others to feed them.

"This is the case."

This time, it was Qu Liangsheng who spoke:

"Dean Lu and I are currently studying the electromagnetic bearing-flexible rotor system that is used for ultra-high-speed rotating equipment. However, the software and hardware foundation in Jincheng is relatively poor... If we build it from scratch, it will consume immeasurable costs. I don’t have enough funds and time, so I was wondering if I could cooperate with you, Academician Chang, and also make use of your group’s existing experience and testing platform..."

Chang Haonan was very familiar with this kind of operation.

However, it was usually initiated from his side before.

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

After thinking for a moment, he slowly said:

"But I want to know, in what areas was this research that you two were originally intended to be applied to?"

Lu Yongxiang and Qu Liangsheng looked at each other.

"Ultra-fast centrifuge...or to put it more directly, it extracts high-concentration nuclear fuel!"