Chapter 93: Seon Loses His Horse

When Chang Haonan was thinking about the improvement of the Kalman filter algorithm, the project team of the entire 83 Project was of course not idle, but began to study the influence of bending blades on the flow separation in the diffuser blade grid in accordance with his deployment.

Because there are already mature ideas and research methods, there are not many parts of the whole process that need to be flashed, mainly step-by-step and meticulous.

With the help of Chang Haonan and the entire digital design team, the efficiency of tests such as static pressure distribution and limit flow spectroscopy has been greatly increased, and the number of tests that need to be carried out has been reduced by almost an order of magnitude compared to before, because the results can be estimated by simulation methods, or at least the trend of the results.

But even so, after all, every experiment requires the 410 factory to actually build the required compressor blades, so the improvement of the entire engine is still impossible to complete overnight.

Of course, for the 606 Institute, which was accustomed to working in years, this progress was almost like a dream, and even Yan Zhongzhong was shocked by how smoothly the experiment had progressed.

In short, according to Chang Haonan's own estimation at the beginning, it will take about twenty days to come up with an improvement plan.

If it weren't for the fact that at the end of the first week, Yao Mengna stumbled upon an article from the Journal of Aeronautics.

……

Time goes back to the time when Chang Haonan had not yet joined the 83 Project research group.

In the ice city more than 500 kilometers away from Shengjing.

Ph.D. student Donglin Zhang is using classical ROTOR37 blades in the aerodynamics laboratory of Bingcheng University of Technology to study the influence of blade tip gap height on the flow field.

In fact, it is similar to Chang Haonan's ongoing project, but the content of the research is relatively rough.

Moreover, due to the lack of support from simulation methods, the research methods of their research group are still mainly based on traditional large-scale experiments, and the funds are not very sufficient, so the efficiency is not high.

"Senior brother, there's another power outage in the lab."

Zhang Donglin's junior brother puffed out his cheeks and pushed open the office door with a depressed face.

"I know." Zhang Donglin pointed to the two computers in the office that had been turned off due to power outages: "But there is no way, I can only wait." ”

For Huaxia in the mid-90s, power shortages were still a major problem that plagued the whole society.

In fact, until about 2010, it was still a relatively common thing for many non-first-tier cities to have their power supply cut off due to insufficient power supply in residential areas.

Relatively speaking, Bingcheng University of Technology, as a university directly under the Commission of Science, Technology and Industry for National Defense, naturally has a high priority in terms of power supply.

But even so, except for some particularly focused laboratories that have independent power lines or even their own generators, power outages are still a frequent difficulty.

So Zhang Donglin wasn't too surprised, just looked at the two computers and muttered:

"I just hope that the data in the computer will not be lost due to a sudden power failure......"

His junior brother also lay down on the two chairs that had been spliced together next to him.

"In that case, senior brother, I'll make up for sleep first, and if you call, you can call me again."

Because the summer vacation has not ended, there are only two of them in the entire office, and the relationship between the junior and Zhang Donglin has always been very good, so they are relatively open.

Zhang Donglin, who was also swept away by fatigue, nodded, but almost instinctively lay on the table.

About an hour later, the two were woken up by a ringing phone.

It was their mentor, Professor Lin Haijun, who said that the school's metalworking center had sent a new batch of leaf samples for them to pick up the goods.

The phone can ring, which means that the power supply has been restored, so Zhang Donglin asked his junior brother to go back to the experiment, and he began to accept the batch of blades.

Then he saw a scene that made people high blood pressure.

Due to some defacement of the paper drawings during the handover process, the workers in charge of the production process mistakenly opened a tangential channel on the surface of the blade that runs through the suction and pressure surfaces.

All of the more than 30 blades in this batch were scrapped.

Fortunately, he checked it carefully before signing it, otherwise if he had just signed his name, the loss would have to be borne by the research group.

Naturally, the blades used for basic research in the school could not be made of any special and expensive materials like the ones that were actually used for aviation development, but even so, it was a large expense for their young mentors.

After taking a few minutes to stabilize his mentality, Zhang Donglin contacted the mentor with the phone number of the director's office in the metalworking center.

After all, the youngest associate professor in the school still has some status, and after some battle, the metalworking center finally promised to rebuild a batch of blades for them, but because of the production schedule, it will take an additional 4-5 days.

Now that these waste blades have been delivered, no one wants to bring them back.

Therefore, Zhang Donglin, who was a little worried about the progress of graduation, returned to the laboratory depressedly, casually put those waste leaves in the corner of the wall, and then returned to the office to continue to sort out his previous test data.

This little turmoil was quickly forgotten.

It wasn't until noon the next day that the junior brother hurried in again.

"Senior brother, our experimental equipment may be broken."

Zhang Donglin felt as if his heart had stopped beating for a second.

"What's wrong?"

"I got a new set of blades, but the experimental data was ...... compared to the previous series Very unusual. ”

"New blades?" Zhang Donglin was stunned for a moment, and then realized that after he put the damaged leaves in the laboratory yesterday, he forgot to notify the junior brother who was doing the experiment.

This finally relieved him, who had just been nervous, and waved his hand at the junior brother standing at the door.

"I forgot to tell you that the blades piled up next to the cabinet behind the door are accidentally processed waste products from the metalworking center, and it is normal for you to make a mistake in the data when you install them."

"Waste...... Waste? ”

The surprised voice of the junior brother made Zhang Donglin raise his head again:

"Yes, you should pay attention to it when installing the blades, there is a slit on that side."

"But senior brother, judging from the experimental results, the performance of those blades ...... It's meritorious, it's just that it's very volatile. ”

"Huh?"

He thought briefly about the papers and reference books he had read in the past, and did not think of anyone who had studied the effect of the chordal slit on the front and trailing edges of a blade under pressure.

After all, intuitively, this will only cause the flow field inside the compressor to become more disturbed.

However, Zhang Donglin, who has been studying for a doctorate for three years, understands that it is in these things that are usually ignored because of intuition that it is more likely to find new discoveries.

"Take me to see it."

(End of chapter)