Chapter 148 I’m not going to be too pretentious, I’ve figured out the equation
Everyone saw Lu An suddenly smiling brightly, everyone looked at each other, and they didn’t know what kind of medicine he was selling in his gourd.
At this moment, everyone felt that Lu An was either joking, talking crazy, or just not awake when he put forward the request to launch the project within 18 months.
Lu An sat calmly with his back on the chair, his smile remained unchanged, he looked around at everyone and said, "Everyone thinks I'm talking nonsense. Admittedly, if it were a traditional technical engineering research and development idea, it would be impossible to do it in 18 months."
Lu An paused for a moment, and suddenly glanced at Petrov.
Then he followed what he just said and said: "What if I say there is a miracle? What if I say that the Navier-Stokes equation, a century-old problem, has been solved? What if I say that a new set of simulation and experimental software tools based on the analytical solution of this equation is available?"
As soon as these words came out, everyone present was stunned, and everyone looked at each other.
Wang Tiejun was the first to react. He lowered his head and took a closer look. His heart skipped a beat and he immediately raised his head to look at Lu An.
"Comrade Lu An, what do you mean by this?"
After a moment, Lu An said calmly and calmly: "Okay, everyone, I won't be too pretentious. Let's just say it. I have solved the problem of Navier-Stokes equations."
His voice was not loud, but this sentence was as shocking as earth-shattering.
Everyone: "???"
Swipe one by one!
Everyone focused on Lu An with shocked eyes.
To the scientific experts present, what he said was simply not surprising. Everyone present knew the Navier-Stokes equation.
Because the development of aircraft and rockets must face turbulence problems, CFD software tools must be used, and this is closely related to the Navier-Stokes equation.
Everyone knows how difficult it is to crack the Navier-Stokes equation, and some even assert that no one may be able to crack it within this century.
The whole world is looking forward to and waiting for the emergence of unparalleled mathematical geniuses of the level of Gauss, Euler, Abel, and Ramanujan.
Ordinary mathematicians can’t figure it out in their entire lives. The field of mathematics relies on stacking people. No matter how many people pile up, it’s useless. If you can’t figure it out, you can’t figure it out.
Those present also know what it will mean if this century-old problem that has troubled mankind for 200 years is solved.
It can be said that Lockheed Martin, a company in the aerospace field, may shorten the design cycle of its F-35 fighter jet to one year. For example, it can directly optimize the design of the inlet and tail nozzle through analytical solutions.
Oil companies can predict reservoir flow in real time, replacing the existing empirical scientific model that relies on trial and error data, and the recovery rate has increased significantly.
In the field of biomedicine, the accuracy of blood flow simulation in cardiac bypass surgery can be improved by two orders of magnitude. Blood flow is also a fluid and turbulent problem, and the risk of thrombosis can be accurately predicted.
At this moment, Wu Guangyu, who had always been cautious, was the first to stand up.
His face was filled with disbelief and shock. He stared at Lu An and said: "Comrade Lu An, the Navier-Stokes equation is the fundamental equation describing fluid motion. Its complexity is recognized. For more than two hundred years, countless mathematicians and physicists have worked hard and have only obtained extremely limited analytical solutions for special cases. You said that you - you have found a universal analytical solution? "
Others at the meeting also reacted.
"Universal analytical solution?"
"Navier-Stokes equation?! Are you sure you are not joking?"
The group of old experts in the conference room instantly exploded into a collective explosion. The Navier-Stokes equation can be regarded as one of the "Holy Grails" in the world of mathematics and physics.
Lu An suddenly said that he had it done. How could the veteran experts present calm down?
At this time, Cheng Shuqiang, who was attending the meeting, stared at Lu An intently and said: "The analytical solution means almost absolute accuracy and infinitely close to zero numerical error, but this is theoretically considered to be infeasible for complex flow interruptions. Comrade Lu An, how do you prove it?"
Next to Lu Ming couldn't help but said: "Comrade Lu An, we know that you are a rare cross-field genius, but the universal analytical solution to the Navier-Stokes equations sounds too unbelievable, and you said that even specific simulation application tools have been developed? Can this software tool really run? Are the data results credible?"
At this moment, the experts present were shocked and skeptical, but they were even more hopeful that what Lu An said was true.
Facing the eyes of a group of veteran experts staring at him, Lu An smiled and said: "The proof process is a bit complicated, I'm afraid I can't explain it clearly in a few words."
Lu An changed the topic: "But now that the tool has been developed, can't we indirectly verify it by running it directly?"
Seeing Lu An so confident, it doesn't look fake no matter what.
Good guy!
This time everyone is very excited.
Wang Tiejun said quickly: "Let's go to the laboratory, go to the laboratory."
Lu Ming also waved his hands repeatedly: "Yes, go to the laboratory. Go now and take a walk. If it is true, you will know after running around and verifying it." Hearing this, Lu An smiled and said, "Okay, let's go for a run."
So everyone walked out of the conference room and passed by the public office area, which was filled with the company's core engineers.
These employees were very dissatisfied at this moment, because they found that all of these big bosses were extremely excited, and several deputy chief engineers even turned red with excitement. The excitement written on their faces could not be hidden at all.
Watching a group of expert experts and Lu An leave in a dusty manner, everyone couldn't help but whisper to each other after they left.
loy �I wonder, what is going on?
"It's very rare for Chief Wu to be so excited. It means something big happened."
"And it seems to be a good thing!"
A highly confidential research and development center.
Lu An and a group of old experts came to the R&D center.
This place is highly confidential. No one without permission or special permission can approach, but everyone present has permission.
After a while, Lu An walked to the console and connected his personal terminal to the system.
At the same time, the screen was projected onto the big screen, and everyone stared at the big screen.
As time goes by, a software icon with an extremely simple and even plain interface that no one has ever seen appears on the home screen.
The name has only two words:
【星流】
After a while, Wu Guangyu was assisting in the operation. He said: "This is the CZ-5 Yao-2 rocket under a specific Mach number and angle of attack. The actual wind tunnel experimental data of its core-stage booster complex has been rigorously verified and finalized data. The CZ-5 Yao-2 rocket is expected to make its first flight next year, but Star Power Aerospace now has data on this rocket.
Without the participation of the four major national teams and the strong support at the national level, it would be impossible for Star Dynamics Aerospace to obtain such highly confidential core data.
Lu An said nothing, he nodded.
He immediately opened the Xingliu software tool and began to operate it skillfully. Under everyone's breathless gaze, he quickly imported the precise geometric model of the Chang 5 rocket, the same Mach number, angle of attack parameters, atmospheric conditions, etc.
After a while, Lu An said: "Okay, let's use the star flow tool to conduct a simulation experiment under the same conditions to see if the final data results are consistent with the actual stereotyped data blown out of the wind tunnel."
After Lu An finished speaking, he decisively pressed the start button, and the flow field structure diagram of the Changwu Hou built model soon appeared on the screen.
However, unlike traditional CFD software that requires long-term iterative calculations, the rendering of star streams is almost real-time, with clearly visible shock waves,
The separation zone and vortex structure are generated and evolved around the model at an astonishing speed and accuracy, and the colorful streamline diagrams intuitively display the pressure distribution and velocity field.
Time passed minute by minute, and after about eleven minutes, the simulation ended.
Wang Tiejun was stunned and said: "What? You have completed the simulation of a complex flow field so quickly?"
Others present were also extremely shocked. This would take several hours no matter how fast a traditional supercomputer is, and most would take several days.
As a result, it only took about ten minutes to complete. This efficiency was so high that everyone was shocked.
The software automatically generates dense data reports, including pressure coefficient distribution of key sections, total drag/lift force, surface friction distribution, etc.
Lu An did not speak. He silently projected the data report generated by the Star Stream Tool and the actual wind tunnel test data report displayed in the window next to him on the main screen side by side.
The twenty or so experienced experts present, including Wu Guangyu and Cheng Shuqiang, all looked at the data on the giant screen.
Everyone’s eyes are scanning the comparison of these two sets of data, from the pressure values at key points, to the overall lift and drag characteristics, to the local flow analysis characteristics of the seats, row by row, column by column, the data comparison results of the digits after the decimal point show that they are perfectly consistent and highly consistent!
The laboratory was as quiet as a pin drop, and everyone looked at it in disbelief.
「This, how is this possible——」
Wu Guangyu muttered to himself, with trembling hands, he zoomed in on several high-precision pressure measurement point data that he had personally participated in the analysis and was extremely impressive.
Petrov stared at the data control group and was shocked and said: "The deviation between the predicted value of the star flow and the actual measured value in the wind tunnel is far smaller than the error range allowed by traditional CFD simulation. No, it even reaches the measurement accuracy limit of the wind tunnel test itself."
Wang Tiejun stared at several key aerodynamic derivatives. He was shocked and said: "The consistency exceeds 99.9999989%? It's incredible, it's incredible. The turbulent structure in the key area is captured. This is not just a coincidence, it's a perfect reproduction!!"
“This software tool saves not only time, but also countless trials and errors, costly wind tunnel tests and various other tests. This is an artifact-level tool that can reduce the development cycle and cost by orders of magnitude!!”