Chapter 45 Fan Design for Dimensionality Reduction Strike

"Then... then we have no chance?"

Yan Wenbin's face was full of unwillingness.

Not only because he has invested a lot of energy and cost in this project, but also because he originally planned to use this order from Changhong Group to build the reputation of his Owl brand motor in the industry.

"That's not necessarily the case." Wang Luoyong shook his head: "Given the size of our Changhong Group, we still have some say, so it's not without room for maneuver."

"Uncle Yan, if your Owl Motor products can surpass Fuji Electric in both performance and cost, then we will be confident to convince the superiors."

In the final analysis, this matter was because the method of creating opportunities for Yan Wenbin by extending the bidding deadline was too crude. Therefore, Fuji Electric discovered the key to the problem and then seized the loopholes in the localization rate statistics method. Just stole the house.

In addition, the Chang Hong Group was not completely reasonable to begin with, so they did not dare to speak too loudly.

But if Yan Wenbin’s Owl Motor can produce a more convincing sample than Fuji Electric, then the situation will be completely different.

At least from the perspective of Wang Luoyong and Chang Hong Group, they have the capital to argue.

"But……"

As a veteran who only went to junior high school, Yan Wenbin is not very technical, but he participated in the entire bidding process last time, and he still has a rough estimate of the gap between his own products and Fuji Electric.

Although he did not know the term marginal effect, his past experience in the army told him that it is easy to improve training results from unqualified to qualified, but it is more difficult to improve from qualified to excellent. After passing the excellent line, he wants to continue to improve. , then it will take even more hard work.

The product produced by Fuji Electric is obviously the result of continuous improvement.

Therefore, although Hao Dagang was full of praise for the college student who optimized the design, Yan Wenbin found it hard to believe that someone could make the performance of the fan surpass that of the opponent in less than a week.

However, Hao Dagang next to him seemed more confident:

"Brother Yan, I think we may not have no chance. I have read the design document provided by Brother Chang, and it makes some sense."

After hearing this, Yan Wenbin had no choice but to nod his head and said to Wang Luoyong next to him:

"Anyway, we are here, let's do a test first and see the results before talking."

"Then Uncle Yan, Brother Hao, come with me."

Wang Luoyong picked up the small wooden box with the fan next to it and walked into the testing workshop with Yan Wenbin and Hao Dagang.

Although he also wanted to help with this matter, there was really nothing he could do now.

Forging test data, on the one hand, he didn't bother to do it, and on the other hand, it was completely useless. It was only a matter of time before he was discovered.

And more importantly, if we rely on this method to increase the localization rate, wouldn't it be no different from that of Hongxiang Motor Factory?

It’s just that the specific process of counterfeiting is different.

With such regret and guilt, Wang Luoyong placed the wooden box in his hand next to the test equipment, and then opened the lid.

There are 6 fan samples neatly stacked inside.

"Should I say it or not, your injection molding process...has made a lot of progress?"

Since the fan is placed vertically, Wang Luoyong cannot see the blade style at first glance, but even with just a glance, Wang Luoyong can notice the improvement of the manufacturing process.

"In fact, the process itself has not changed much. On the one hand, the proficiency of our workers has improved. On the other hand, the mold manufacturer said that the manufacturing difficulty of this new leaf shape is relatively low."

Regarding technical matters, Hao Dagang naturally gave the answer.

Wang Luoyong nodded, then randomly pulled out a fan from inside and prepared to install it on the motor of the air duct test bench.

"Excuse!"

The moment he saw the shape of the fan blades, he couldn't help but exclaimed:

"Your leaf shape is indeed a bit novel. I have worked in Changhong for so many years and I have never seen a similar design."

There is no praise or irony in this sentence, it is just a simple feeling...

Very fresh.

"We found someone from Beijing Airlines who studied aircraft design to do this. He may have some different ideas in this regard."

Hao Dagang was not surprised by Wang Luoyong's reaction. In fact, when he saw this leaf shape for the first time, he had similar thoughts to Wang Luoyong.

However, after reading the technical documents provided together, although he did not fully understand it, he at least believed that the other party did have his own complete calculation ideas, rather than just making a strange and exaggerated design to attract people's attention.

"Learning to fly?"

In this era, the aerospace field still has a somewhat otherworldly tone, so it is not common for relevant technologies to be "decentralized" to the general civilian field. It is normal for Wang Luoyong to be surprised by this.

"Well, I have a distant relative whose child is studying at Beijing Airlines. He said he has a classmate who is pretty awesome."

The one who spoke this time was Yan Wenbin, who had been silent just now.

While several people were chatting, Wang Luoyong did not delay his movements at all. At this time, he had already begun to test the first fan he had just taken out.

Yan Wenbin and Hao Dagang stood behind him, nervously waiting for the test results.

……

As data was recorded on graph paper one by one, the performance curve of this new fan gradually took shape.

Logically speaking, a series of calculations are required later to obtain the final required data.

But Wang Luoyong has tested the samples brought by Fuji Electric many times before, so...

"Holy shit...is this data real?"

Wang Luoyong murmured in an unbelievable tone.

The direct result of the fan test is the curve of the total pressure coefficient and fan efficiency with respect to the flow coefficient. Generally speaking, different blade designs will have advantages in different flow coefficient ranges, so the so-called advantages and disadvantages are actually a process of performance trade-offs. .

But this time is different.

The sample brought by Yan Wenbin with a somewhat strange blade shape had a crushing-level performance in the entire flow coefficient range he tested.

Especially under the most common working conditions of axial flow fans, the efficiency is even astonishingly more than 15% higher than that of Fuji Electric products.

To say they are crushed is to be modest, it is simply a dimensionality reduction attack!

"how is the situation?"

Seeing Wang Luoyong's abnormal behavior, Hao Dagang quickly stepped forward and asked.

"I……"

Wang Luoyong looked at Hao Dagang's eager eyes, but he couldn't say any words of praise for a while.

This result was so exaggerated that he was a little worried that there was something wrong with his test just now.

"Brother Hao, don't worry, wait until I finish testing all these samples."

After finishing speaking, Wang Luoyong quickly replaced the second fan in the box, then called another technician from the next door office and asked him to take the first fan to the semi-anechoic room to measure the noise level.

However, Yan Wenbin, who had always seemed a little anxious before, calmed down, patted Hao Dagang on the shoulder and whispered:

"Dagang, I think the result may exceed our expectations."