Automotive Black Technology Chapter 169: ：Wind tunnel test
www.lnmao.org, the fastest update to the latest chapter of automotive black technology!
After two days of intense revisions, the renderings of the Audi A4 body part were finally finalized.
In this rendering, Li Fanyu did not copy all the drawings in his mind; first, because after brainstorming, some details were made more beautiful. The second reason is that Li Fanyu believes that the A4 of the previous time and space had many inconsistent designs, and some styling treatments were not particularly in line with Chinese aesthetic standards.
For example, the outer body surround and tail shape, the original A4 looks slightly uncoordinated. Now after modification, Li Fanyu thinks it is much better than before.
At the beginning, Li Fanyu was worried that excessive modifications would affect the wind resistance of the car body. But looking at the final design draft, which showed a body that was smoother and more elegant than the original model, he felt that his worries were unnecessary.
In fact, the shape of the vehicle is very variable.
The current changes do not mean that the students are better than the Audi designers of that time and space. Just because of the different aesthetic concepts between China and the West, the improved shape is indeed much better than the original.
After the exterior and interior shapes were finalized, Li Fanyu immediately went to the patent office. The patent was being filed here, and the company immediately started working on computer renderings and the production of clay models of the car body.
These two parts are quite fast; the students are very good at computer modeling. There is a large five-axis pin milling machine in the laboratory, and it is not difficult to make a five-to-one clay model.
An Ning's body has not been very clean these past two days. Although she returned to the laboratory after a day's rest, she still walks a little unnaturally.
With this resentment, every time I look at Li Fanyu, his eyes are filled with anger. Every time I look at An Ning, I feel like my soul is about to fly out.
Anyone with eyes can find that An Ning is different from before. Compared to before, her face was more charming, and her movements were more charming. She already looked younger when she took off her makeup, and now she looks even more charming. Although there is a few years difference in age between Li Fanyu and Li Fanyu, when they are together, no matter who looks at them, Li Fanyu is the older one.
Although she and Li Fanyu have accomplished good things, An Ning still refuses to move in together. And she used her identity as a sister to give this enemy a stern warning not to touch her all the time, let alone reveal their relationship to the outside world.
Li Fanyu didn't know that she had misunderstood the relationship between the two. He just thought that she was embarrassed to expose the relationship between sister and brother, so he agreed without asking the details.
Although they don't live together, Li Fanyu's quality of life has improved significantly; someone helps take care of his clothes and cleans the house. Every morning when I wake up, I knock on the opposite door and there is a prepared breakfast. No matter how late I get home, there are one or two exquisite side dishes hot in the pot.
If you are shameless or shameless, you can occasionally... Hehehe, in short, life is beautiful.
An Ning's attitude towards him would change from time to time; she still doted on him like a younger brother in normal times, but she would also show off her feminine side when she was emotional. After all, women long to be cared for and pampered.
At this point, Li Fanyu, who officially became a man, did a good job. Although An Ning usually tries her best to maintain the image of her sister, she secretly enjoys switching between the two states.
The patent for the Audi A4 was quickly applied for. Because the patent was announced on the national patent website, even though the company required a high level of confidentiality on the research and development progress, the media that smelled the fishy smell still used various means to I learned that Zhengshin is going to enter the B-class car market.
Li Fanyu’s phone has been flooded with calls in the past two days; Wang Dazui, with a gun and a stick in his mouth, praises him for his good job in keeping secrets, and without saying a word, he wants to drink. This is an old buddy who knows the importance and knows that the model must be kept strictly confidential during the design stage to prevent important information from falling into the hands of competitors.
But other media simply want to dig out the big news. They use various tests and insinuations, with only one purpose - they all want to know more about new models.
Of course it was impossible for Li Fanyu to tell them.
But the matter could not be hidden for long, because the 5:1 clay model passed the wind resistance test in the laboratory. The next step is to conduct large-scale wind tunnel testing with a 1:1 model.
The purpose of the wind tunnel test is to observe the effect of air flowing through the car body, observe where turbulence will occur, and the design of that part will affect the drag coefficient. The process was supposed to be a collaboration between styling designers and aerodynamics experts. In order to cultivate the team, Li Fanyu naturally acted as a bricklayer. In practice, the relationship between modeling and aerodynamics was analyzed from shallow to deep, and the group of students who listened could not help but admire him.
The clay model is divided into two stages; one is the 5:1 stage and the other is the 1:1 stage. The reason why it is divided into two steps is mainly to consider the convenience of modifying the small volume model.
In fact, if he did not consider training the team, Li Fanyu could directly conduct a 1:1 model wind resistance experiment.
The small-volume model is not refined enough in detail, so the coefficients obtained are only approximate. Take the wheel room as an example. The 5:1 model is not structurally detailed enough and cannot fully reflect the state of the air flowing through it.
So the final drag coefficient is still based on the 1:1 model and the actual car.
However, the current equipment of Zhengxin Laboratory is mainly for engines. There are small fans, but they are not capable of testing 1:1 models.
So at this stage, Li Fanyu had to go to his old rival, Nanjing Automobile Research Center.
Speaking of which, although this experimental center of Nanjing Automobile is a mess, it still has some useful things.
For example, the wind tunnel laboratory.
The structure of the wind tunnel laboratory is actually quite simple. It is a set of large tunnels with a giant fan embedded inside the tunnel. This thing didn't cost much, but it looked impressive, so Zhang Yong built one at that time.
If you don’t want to go abroad, then the wind tunnel test of the A4 can only go to Nanhe.
At that time, the appearance of the A4 will inevitably be exposed. After much deliberation, and after deciding to go to Nanjing Automobile Group for testing, Li Fanyu generously invited Wang Dazui to conduct the first exposure of the A4 through Pinche.com.
The news is given to everyone. If it is given to the media with good connections, it can also get objective and positive reports, which can serve as a warm-up publicity.
Why not?
It is said that Nanjing Automobile carried out a round of blood changes after Zhang Yong entered. The heads of the family have all been changed, and the current helmsman is named Chen Yazhou.
Li Fanyu found his phone number through the resources of the Automobile Association and called him directly.
When Chen Yazhou heard that Li Fanyu had announced his status, he politely agreed to the matter.
"Brother, you can come here at ease. You can use the experimental center as you like. You can use whichever laboratory you want. I will explain it to you right away."
Hey, this attitude is a bit attentive! Li Fanyu was a little surprised when he heard the excessive politeness over there.
How did he know that Nanjing Automobile has already regarded him as a evil star?
Why did Zhang Yong’s group of leaders go in? From the beginning of the laboratory to the end, which setback was not closely related to him, Li Fanyu?
After Chen Yazhou summed up the lessons of his predecessors when he first took office, he secretly made a consideration in his heart - Zhengxin, a neighbor, must not be offended.
People in his position are more or less superstitious. In his impression, Li Fanyu and Zhengxin were Nanjing Automobile's nemesis. If you can maintain it well, then maintain it. If you can't maintain it...then stay away. (To be continued.)