Chapter 1115: Nuclear issues?
For Chang Haonan, compared to directly using the Shijian-7 satellite constellation and the immature Beidou generation to make do with testing autonomous orbit determination technology, just verifying a maximum power point tracking is obviously just a casual task. It doesn't require him to put in much extra effort.
It can still be completed by Zhang Weiyong and others alone.
What’s more important is that the risk is very small and will not have an impact on the mission load of the constellation itself.
Meng Zhizhong originally wanted 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 get promoted, based on the actual situation, the final test efficiency will still be improved. higher.
Naturally, both parties are happy.
At this time, Lu Yongxiang, Xu Dikuang and others who had just left also returned to the conference hall.
"Comrades."
Considering that it was the dean of the Academy of Sciences who was speaking above, now it is the turn of the Academy of Engineering to show its face.
As Academician Xu came on stage, the conference hall that was a little noisy just now quickly calmed down again.
"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 is sitting in the front row, does not even need to look back, he can feel the feeling behind him. The air almost solidified at this moment.
After all, in principle, only after obtaining the certificate can one be considered an academician officially recognized by the organization.
Although in reality few people would bother with such details, people still need a sense of ritual.
Perhaps because of this, everyone showed quite high enthusiasm.
In just a few seconds, a large number of people had already stood up in the entire conference hall.
Actually, 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 took a look at the dark situation behind and put his buttocks that were half raised back down. .
However, in the eyes of outsiders, this behavior seems to be a sign of a stable mentality.
Especially Academician Lu, who had admired Chang Haonan before, even 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 is over, don't leave in a hurry..."
"? ? ”
In fact, it was not difficult to tell when Lu Yongxiang was on stage just now. He spoke with a Zhejiang accent, so he usually slowed down when communicating with others.
But even if he knew this was the case, Chang Haonan almost couldn't stand up because of this sentence similar to "Don't leave after school", and it took a lot of effort to suppress his smile.
"Academician Qu and I want to talk to you about some business matters. Of course, we also want to deepen our understanding of each other..."
This surname is not very common. Chang Haonan briefly recalled it, and only came to mind. Academician Qu Liangsheng asked himself a question before.
But these two people have never had any contact with him before.
Moreover, one is a dean in the field of mechanical fault diagnosis, and the other is an expert in fluid transmission and control. They seem to have no direct connection with the projects at hand...
But, after all, they are The dean of the Academy of Sciences spoke, and Chang Haonan agreed.
As a result, when he participated in the certificate awarding ceremony later, he was a little absent-minded out of curiosity.
Fortunately, with more than a hundred people, even if they came 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 longer because of the high-level leaders.
By the time the ceremony was over and lunch had been had, it was already two o'clock in the afternoon.
Because Academician Lu did not say anything more specific at that time, Chang Haonan had to wait at the door of the Great Hall.
But soon, he found that the place he chose did not seem to be very good...
After saying hello to countless colleagues who were also preparing to leave, Chang Haonan, who was thirsty and tongue-tied, finally listened. When he heard a familiar voice coming 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 is 72 years old, has been working on the front line for many years, and has never been in good health.
After walking closer, Qu Liangsheng continued:
"Dean Lu was just called away by his superiors. It seemed that he wanted to discuss some policy issues... He said that we should let the two of us go. Go wait inside the academy first, 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 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 during some policy formulation processes.
"Okay."
Chang Haonan was about to nod, but stopped:
"Academy of Science or Academy of Engineering?"
This question made Qu who had just stopped walking. Liangsheng was stunned.
I immediately realized that although Lu Yongxiang was the dean 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 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 He said in a half-joking tone:
"Now, I have become the one holding back..." Chang Haonan stepped forward and prepared to lift up the other side of Qu Liangsheng's body:
" It’s just that the division of labor is different, so there’s no saying that we can’t hold back...”
But the latter broke free together with the staff next to him:
"Okay, okay, Xiao Liu, just drive first. I'm not old enough to walk all the way. Don't move... 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 adjusting the tie around his neck, he continued:
< br>"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 be there.
The total distance is only about two kilometers.
So, not long after, Chang Haonan and Qu Liangsheng were sitting in a conference room of the Academy of Sciences.
And as he said, Lu Yongxiang didn't let them wait 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..."
While taking off his coat, he apologized to the two of them. .
Of course, no one can really blame him for this little thing.
So the three of them quickly got to the point.
"Academician Chang, during the previous 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 time, 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, as for the specific project, it is currently only used on a jointly developed foreign engine, and there is also a mechanical backup, mainly used to collect user data, so it has not been used in our own "
"So that's it..."
Although Lu Yongxiang's tone was calm, judging from his expression, Chang Haonan's answer surprised him: < br>
“I wonder if it would be convenient for Academician Chang to reveal how you solve the rotor life problem caused by 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, which does not mean that equipment with bearing loads can also support it.
In particular, electromagnetic bearings have no rigid contact, so there must be more serious gyroscopic effects and vibration interference from the root. Moreover, at ultra-high speeds, the rotor needs to pass through multiple critical areas within the operating speed range, and the control logic It is also more complex than traditional bearings.
No wonder Academician Lu is so eager.
However, Chang Haonan smiled bitterly and shook his head:
"It's not inconvenient, because we haven't solved it at all..."
"Huh?"
"Ah. ?”
The two academicians opposite were shocked at the same time:
"Then how did you pass the life and reliability test..."
Chang Haonan quickly explained:
"We chose electromagnetic bearings simply to provide part of the power and reduce parts. It’s just a number..."
"So, SeA650 actually only has the No. 1 fulcrum, that is, the outermost fan uses an electromagnetic bearing... Academician Lu should know something about this. The fan speed is much lower. For compressors and turbines, it is generally only a few thousand revolutions per minute, and it may be even lower during cruising, so there is no pressure in terms of radial load..."
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. It is impossible to just rely on others to feed them.
"The situation is like this."
This time, it was Qu Liangsheng who spoke:
"Dean Lu and I are currently studying electromagnetic electromagnetic fields supporting ultra-high-speed rotating equipment. Bearing-flexible rotor system, but the software and hardware foundation in Jincheng is relatively poor... If we build it from scratch, it will consume immeasurable money and time, so I was wondering if I could cooperate with you, Academician Chang. , and by the way, you can also make use of your group’s existing experience and test platform..."
Chang Haonan was very familiar with this kind of operation.
It’s just that 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 is indeed a demand..."
After thinking for a moment, he slowly said :
“But I would like to know, in what aspects was this research you two engaged in originally intended to be applied?”
Lu Yongxiang and Qu Liangsheng looked at each other.
"Ultra-fast centrifuge...or to put it more directly, extracts high-concentration nuclear fuel!"
(End of this chapter)