Chapter 139 Analytical solution of the Navier-Stokes equation
The next morning.
"This is the talent assistance list of the four major companies, with a total of 859 engineers." Meng Qiuyan came to Lu An's office and placed a USB flash drive and a paper document on his desk.
Lu An picked up the documents and opened them for reading. He quickly noticed the mug shots of several foreign faces.
The resume information shows that they were all talents for the "double introduction" project launched by the country at that time. They were originally from Uklan, but now they are Hua nationals, and their family members have settled in Hua for more than ten years, so they can be hired with confidence.
These experts also have the most critical resume. They are all the world's top experts trained by the aerospace system of the former Soviet Union.
Andrei Novikov is a world-class structural dynamics expert. The material states that he is good at structural dynamics, composite material design, fracture mechanics, extreme environment materials, etc.
But who would have thought that when he was in Uklan twenty years ago, he would be reduced to becoming a taxi driver.
Another Ukrainian expert named Dmitry Petrov was in even worse condition. He was so embarrassed that he almost starved to death, but he managed to survive with the US$300 provided by staff from China in Ukraine.
While Lao Su was alive, Petrov was an experienced space launch site operations commander. At that time, he managed the daily operations of large launch sites and multiple major launch missions.
· Specialized in launch site system engineering, rocket operation procedures, propellant handling and filling, large machinery operation, mission control center management, etc.
Since the separation of the old Soviet Union, Petrov became a cleaner in Uklan.
Those old experts who were once world-class experts in the aerospace industry had both superb technology and the lowest social status in that era.
When Lu An saw this information, he couldn't help but sighed: "These people are really wasting their resources. These people can do very well if they are asked to build aircraft carriers, airplanes, and rockets, but if they are asked to clean swimming pools and clean up, they may not even know which mop to use."
At that time, the whole world knew that these experts were priceless, and the whole world was robbing people, but Ermao himself did not know it. At that time, no one remembered that they were once leaders in the world's aerospace industry. These experts had to sell their houses in order to make a living, and they became homeless for a time.
To this day, we still do not cherish the two cents. Many companies are on the verge of bankruptcy and are left to fend for themselves.
For example, Zaporizhia’s Motor West Riding Factory lost about 85% of its orders, and thousands of engineers were laid off. The Makarov South Machinery Manufacturing Plant was once its largest rocket and aerospace industry enterprise, but the plant has now switched to working one day a week and is on the verge of bankruptcy.
Today, old experts like Petrov have gradually become idle and are living a retired life.
On the one hand, the country allows them to retire out of care, and on the other hand, it gradually begins to use its own people. Over the years, it has learned its skills.
However, retired old experts like Petrov are actually very distressed. They come to Huaguo to eat, drink and stay healthy. They always want to continue to shine for their careers on the front line.
For these people, being able to continue to engage in the work and career they love is more important than anything else.
Now that the Star Power Aerospace Company has been established, the country is thinking about finding a class for these idle experts, so let's go to work in Star Power Aerospace.
Old experts such as Novikov and Petrov were very happy when they learned that another class was in the class and agreed without saying a word.
This class is so willing to join and can continue to do the work they love, and they really don’t need a salary.
At this moment, Lu An was very satisfied after reading the materials: "With the participation of more than 800 people, the main scientific research department of Star Power Aerospace can be quickly set up, and the company will be able to operate normally within three months. However, there are still not enough talents."
Meng Qiuyan said: "These talents are seconded from the four major companies. When the talent team system of Star Boundary Dynamics is established, they will have to return to their original units. Will their treatment in the company be treated as regular employees?" Hearing this, Lu An said without hesitation: "Since they are here, they must be free as much as possible. If you are willing to stay, you should be treated as a regular employee. If you want to retain people, sincerity is the surefire way. Especially for the more than 30 people in the paper documents, Lu An was very satisfied after reading their resume information. This is truly a top talent. Each one is at least a top expert at the deputy chief engineer level.
Finally, Lu An selected seven top experts.
They are Wang Tiejun, Lu Ming, Zhou Zhixiong, Cheng Shuqiang, Wu Guangyu, Dmitry Petrov and Andrei Novikov.
According to their areas of expertise, these seven experts will be appointed as the heads of the seven core departments of Star Power Aerospace.
"Remember, the heads of the seven departments have made the following arrangements."
Lu An glanced at Meng Qiuyan and said:
"Wang Tiejun, the head of the Propulsion System Department; Novikov, the head of the Structural and Materials Engineering Department; Petrov, the head of the Launch and Ground Systems Department; Guidance, Navigation and Control Cheng Shuqiang, the person in charge of the Manufacturing Department; Zhou Zhixiong, the person in charge of the Avionics and Electrical Systems Department; Lu Ming, the person in charge of the Safety and Mission Assurance Department. Meng Qiuyan took notes one by one and asked: "What rank and salary are given to these six people?" Lu An said concisely: "They are all given the rank of deputy chief engineer, with an annual salary of 75 million."
These top experts are actually not sensitive to salary, and they no longer have financial problems.
But these are two different things. The annual salary must be paid in full. If they feel that the money is too much, they can donate it themselves.
Lu An thought for a while and said: "Wu Guangyu, the head of the Mission and System Integration Department, has the rank of chief engineer."
Wu Guangyu is a top expert with outstanding merits. His resume states that he has served as the chief engineer of multiple rocket models. He is calm, experienced, prestigious and good at listening. He has a global vision and excellent communication and coordination skills. He can mediate between departments with different personalities and deeply understands the complexity of aerospace engineering.
He is also a top technical expert, specializing in system engineering life cycle management, requirements engineering, interface control, technical risk identification and mitigation, system-level modeling and simulation, and cross-domain technology coordination.
The Mission and System Integration Department is also the most important department among the seven departments. Its core responsibilities are to define the system architecture and top-level requirements of the entire arrow, and decompose them into subsystems, manage the physical, electrical, and data interfaces between all subsystems, conduct system-level trade-off analysis, and lead key design reviews and technical difficulties.
This is the top person in charge of rocket technology. Within the framework set by the company's leader, Lu An, he has the final technical decision-making power, so he is given the top rank of chief engineer.
After finalizing the heads of the seven core departments of Star Power Aerospace, Lu An read through it again to confirm that it was correct. He immediately leaned back on his office chair, looked at Meng Qiuyan and said with a smile:
"I am responsible for ordering generals, and leaving the task of ordering troops to these generals. The other 850-odd engineers will go to which department, and let these seven people in charge discuss which ones to go to for the remaining experts in the document. The department let them choose by themselves.”
After a pause, Lu An added: “More than 800 other people confirmed their ranks and benefits, and finally submitted them to me for signature and approval.”
Meng Qiuyan: “Okay.”
ˆ The relevant green light should almost be given. Although the company has just been established, it is not an ordinary start-up company.
The starting point of Star Dynamic Aerospace is the end point of other private commercial aerospace companies, and it has received support from the top domestic aerospace resources.
But at the same time, Star Power Aerospace also shoulders a huge mission and task, which is to break through the ceiling in the aerospace field.
Other commercial aerospace companies may not be able to do it, but Star Power Aerospace must do it.
Others in the industry are envious but not envious. Envy is because they are greedy for the top resources obtained by Star Power Aerospace. But they are not envious because the pressure brought by these three words "must do it" is really too great.
Everyone with a discerning eye knows that if Astral Powered Spaceflight fails to produce results in the future, doubts, criticisms, and ridicules will come overwhelmingly.
In contrast, colleagues feel that this is the first place, so there is no need to compete.
It’s good to enjoy the shade under a big tree. If Astral Dynamic Aerospace can open up the commercial space era, it would be nice to follow them and have some soup. At least you won’t have to bear so much pressure and responsibility.
The headquarters of Star Power Aerospace is located in Jianing City, so we have to work here.
The temporary office headquarters and R&D building were purchased directly from a ready-made building, and Jianing City gave the green light.
The construction plan for the new headquarters of Star Power Aerospace has been scheduled in advance. A 500-acre piece of land was acquired in Hedong District. Wu Hongsheng made the decision to acquire the land at the speed of light, and the land was obtained at zero cost.
Lu An only needs to make decisions on these matters, and does not need to do it himself. There are people under his command to execute them.
…
The second floor of the villa at home.
In one of the largest rooms, there are several large double-sided whiteboards, covered with formula symbols.
Lu An came to this room when he got home from get off work. At the moment, he was writing furiously on one of the whiteboards.
He is working on solving one of the "Seven Major Mathematical Problems of the Millennium", which is crucial to astral power aerospace. Solving this mathematical problem can super double the speed of the development of astral power.
Meng Qiuyan was also here. She stood aside and looked at the formula derived by Lu An and frowned: "Okay, I can't understand it at all now."
Meng Qiuyan was actually a top student with real talent. She studied four majors during her schooling, including computer science and data statistics, and her grades were very good.
But at this moment, reading the content on the whiteboard is like reading a book from heaven.
Lu An smiled without looking back: "It's okay if you don't understand, as long as I can understand."
After a moment, Meng Qiu said thoughtfully: "As far as I know, although there is an analytical solution to the Navier-Stokes equation in mathematics, it is limited to very special simplified conditions."
Meng Qiuyan turned to look at Lu An: "For most actual flows, especially It is a complex three-dimensional flow, turbulence, etc., and no analytical solution has been found yet. The academic community generally believes that there may not be an analytical solution expressed by elementary functions or conventional special functions. "
The Navier-Stokes equation is so difficult to solve because everything comes from turbulence problems.
The reason why turbulent flow problems are difficult to solve is that its fluidity is extremely unstable, changing anytime and anywhere, and difficult to predict.
This is a typical chaotic system, and the three-body problem can only be solved by children.
Simply put, turbulence will continue to generate vortices, which will split into more small vortices, and then large vortices will continue to be generated, and the cycle repeats.
It is almost impossible to accurately describe the motion trajectory of each vortex. However, when facing many vortices, it is not necessary to study the motion of each vortex. You only need to calculate the average motion. Although the accuracy is not high, the efficiency is very high.
This is also the reason why weather forecasts can only predict and cannot accurately calculate.
The current research method on fluids such as turbulence is basically estimation, and the equation used in estimation is the famous Navier-Stokes equation.
…
(End of this chapter)