The military-industrial scientific research system of the academic master.

Chang Haonan is lucky.

Or it can be said that Yao Mengna is very lucky.

Although she didn't actually get many complete results due to convergence speed issues.

However, Chang Haonan still found an unexpected joy.

And it’s done with the naked eye.

In the numerical simulation of aeroengines, due to the very complex structure of the multi-stage axial flow compressor, it is very difficult to directly perform numerical calculations on the multi-stage axial flow compressor, and there are many limitations in modeling and calculation.

Even if it is calculated by force, it will not be easy to understand the vast results.

Fortunately, after this period of training, Yao Mengna has become very skilled in model simplification.

Since the multi-stage axial flow compressor is composed of many "stages" with similar structures, the interaction between multiple stages can be ignored during the study, and a single stage can be calculated and analyzed. Optimizing a single stage means that the entire compressor has been optimized.

The flow inside a single stage is still relatively complex, and further simplification is usually required. Neglecting the work done by centrifugal force on the fluid, and assuming that the flow at different heights along the radial direction is the same, the three-dimensional flow in the "stage" can be simplified into two-dimensional primitives. level flow.

For most aerospace engines, including the turbojet 14, a basic stage of the compressor consists of a moving blade cascade and a stationary blade cascade.

Therefore, this numerical simulation, which is only half done, has a very clear research object.

It didn't take Chang Haonan too long to discover the key points.

"Senior sister, go and call the forest workers. The priority of the blade gap problem needs to be raised. If our efficiency is high enough, we should still have time to use it on the turbojet 14."

As he spoke, he took out a notebook and pencil from his pocket and began to record some key data on the screen, obviously preparing for a big fight.

"what?"

Yao Mengna, who felt guilty that she had delayed her progress, had been standing cautiously behind her. After hearing Chang Haonan's request, she raised her head unexpectedly and was stunned for about half a second before she realized what she was doing.

"Oh...Okay, I'll go right away!"

After saying that, he turned around and ran out.

In her expectation, Chang Haonan would start making modifications immediately after reading the code. If he was in a good mood, he would probably make modifications while explaining his ideas to her.

But she never expected that the other party would find something useful directly from the incomplete calculation results that she thought had little value.

She recalled that the first thing Chang Haonan did after entering the door was to stop calculations and then immediately start analyzing the data.

"Junior brother, does he actually trust me so much..."

Yao Mengna felt a touch of emotion in her heart, her steps became lighter and lighter, and her originally heavy mood became much lighter.

Even after pushing open the door of the office, the tone when talking to Lin Shikuan could not help but have a slightly rising tone:

"Lin Gong, Chang Bo wants you to come over there!"

"Oh, okay, I'll go gather the other people."

Lin Shikuan quickly got up and went to find his other subordinates.

From Yao Mengna's unstoppable smile, he logically concluded that there must be something good going on.

Perhaps the progress of compressor improvement has accelerated again?

He had never dared to dream about research progress being ahead of schedule.

But it is indeed something that has happened frequently in the past month or two.

So even though the wings and power of Project 83 have been or are undergoing radical improvements, the overall progress of the project has not fallen behind due to this.

Thinking of this, Lin Shikuan's own mood improved a lot, because the fatigue caused by working overtime in recent days was almost gone.

Although since Chang Haonan and Yao Mengna came to this computing center, his status as the team leader has almost existed in name only, but after all, he has legs to hug, and other people in the Project have gradually changed their view of their digital design team from contempt to contempt. Got respect.

Under this situation, not only did he not feel like being "emptied out" at all, he even wished he could give up his position in exchange for the two great gods being able to protect him all the time.

In short, on this ordinary morning, the entire computing center seemed to be filled with a happy atmosphere.

So when Yao Mengna and Lin Shikuan and others returned to the computer room, Chang Haonan turned around and saw several smiling faces appearing side by side.

He tugged at his hair in confusion.

"You...are you happy about something today?"

After all, in recent times, as the deputy leader of the temporary research team who actually presides over the work, he himself feels that he has gone too far in pushing team members.

In particular, several people in the digital design team were under great pressure because they had to look down and not look up every day.

It's been a long time since I've shown such a relaxed smile.

Chang Haonan certainly didn't know how much drama Yao Mengna had added to herself in just a few minutes.

Because at the beginning, he really looked at the data with the mentality of digging for gold in shit.

The original purpose was just to see where the latter was calculated so that subsequent improvements could be made.

But he actually found it.

"The progress has been accelerated again. Of course it's worth being happy about." Lin Shikuan replied without thinking: "We are ready for the next stage of work!"

Chang Haonan nodded, thinking that Yao Mengna had just understood what he was doing and told Lin Shikuan and others, so he didn't ask any more questions, turned around and walked to the blackboard on the other side of the computer room to prepare for assigning tasks.

Having a positive attitude is always a good thing.

"Now we need to put aside the work at hand." Chang Haonan knocked on the blackboard, attracting everyone's attention:

"I need to calculate the Mach number distribution, static pressure distribution and limit streamlines of several typical design points under the two-dimensional element level model before and after the gap between the blade pressure surface and the suction surface, plus the blade tail The entropy distribution of edge.”

"The specific calculation method is no different from before, and because it is a simplified model, it should not be difficult, but the workload will be more."

As soon as Chang Haonan said this, he heard a gasp of air coming from behind him.

"hiss--"

The smiles of Lin Shikuan and others froze on their faces:

"Does both Dongzi and Shizuko count?"

The moving blade cascade and the stationary blade cascade play different roles in the compressor, so the previous calculation of the wall limit flow spectrum of different curved swept design blades brought almost double the workload, which was very torturous.

"No need, just count Jingzi." Chang Haonan made a gesture on the compressor structure diagram hanging on the blackboard:

"I looked at my senior sister's previous calculation results. In the model of the same stage of the compressor, the effects of stator slits and mover slits are almost the same, so she helped us reduce the workload by half."

"I……"

Yao Mengna had an expression on her face like "Why didn't I know I was so powerful?"