The military-industrial scientific research system of the academic master

The reason why Chang Haonan dared to say something like tearing it down and starting over again was naturally because he was 100% certain about improving the wings.

When he was just flipping through the design documents, he had already asked the system to start a new project.

[Based on the parametric modeling of the existing wing design scheme, the differential evolution algorithm is used to conduct an integrated optimization design of the trailing edge flaps and leading edge slats to reduce the number of gaps and various airflow interference effects in the lift-increasing system, and improve Lift-to-drag ratio at low speed, especially at low speed and large angle of attack]

Consume 15 points.

Being able to start the project in the system means that there is no problem with the idea.

Therefore, after hearing Yang Fenghata's question, he expressed his plan without hesitation:

“This requires the parametric modeling provided by the digital design group to come into play.”

"I plan to post-process the results of CFD flow field analysis first, extract the required performance indicators, and use them as the objective function of the entire optimization problem. Then I will use the Kriging method to select sample points to establish a surrogate model, and then combine the surrogate model with the difference Evolutionary algorithms are coupled…”

The method Chang Haonan talked about is basically the same as the model reduction method he talked about when he first met Yang Fenghao at Beijing Airlines, but the specific implementation methods are different.

Of course, this is not surprising. CFD flow field calculation is an ever-changing thing, and its principle is to solve the Reynolds average N-S equation.

The remaining various methods and models are all because the N-S equation does not have an analytical solution in most cases, so it is necessary to develop a numerical solution with high accuracy and low computational cost.

Most people with an engineering background may not have a strong theoretical foundation. These things should be solved by mathematicians and physicists.

Therefore, most people in the conference room were confused when looking at the derivation process densely written out by Chang Haonan on the blackboard.

But the final conclusion is understandable to everyone.

This algorithm written by Chang Haonan can greatly improve the convergence speed of the optimization algorithm, and the increase in independent variables has little impact on the amount of calculation.

That’s why he dared to optimize up to six independent variables at the same time!

At the same time, hearing Chang Haonan's answer, Yang Fenghao also recalled the amazing feeling he felt when he first saw this young man.

The other party was worth the risk.

So he stood up directly from his seat:

"That's it!"

"Xiao Chang, I will apply for you to use the Sugon 1000 supercomputer. You should complete the algorithm and related programs in the past few days. If there is any test data needed, let the entire August 3rd Project team assist you."

After saying this, Yang Fenghao turned around and faced another direction:

"The wing structure research team has a heavy burden this time. The leading edge flaps are movable rudder surfaces and require certain modifications to the wing structure. After the overall design of Chang Haonan's slats is finalized, Complete the layout of relevant pipelines and hydraulic mechanisms as quickly as possible to ensure that manufacturing of the slats and flaps can begin as soon as possible after the improvements pass the test!"

"The flight control project team must also pay attention to the work of Chang Haonan. We are designing a fighter jet, not a passenger aircraft, and cannot allow pilots to manually operate the slats, so you must modify and adapt the flight control system to maximize the new capabilities. The advantage of design comes!”

"In addition, since it has been determined to make design modifications to Units 04 and 05, we will simply not stop working on them and optimize other parts that were previously inconvenient to change, especially the intake duct professional team. You and Let’s discuss it together with the 606 Institute, and there should be room for optimization in the matching of the inlet and the engine, of course, provided that it does not affect the improvement of the wing.”

"Er-Machine Engineering Design Team..."

"Overall design team..."

As an experienced designer, after determining his determination, Yang Fenghao began to issue tasks in an orderly manner to the various design teams participating in the August 3rd Project.

Chang Haonan is undoubtedly the core role of the entire improvement plan.

His work currently has the highest priority and needs to be coordinated by other design groups.

I have never experienced such treatment in my previous life.

After clarifying the work that each group was responsible for, Yang Fenghao slowly scanned the entire conference room:

"Do each group already know their tasks? If you have any questions, ask them now!"

His attitude of standing in front of the conference table and arranging work is indeed a bit general-like.

This may be a sign of a relatively high level of [Management Ability].

"clear!"

Almost everyone answered together.

Afterwards, Yang Fenghao once again turned his attention to Chang Haonan beside the blackboard:

"Xiao Chang, during this period, I will send Yang Xia, the deputy director of the Secretariat Office, to you to assist you. The Secretariat Office of our institute is also a confidential office, so her confidentiality level is very high, and she can handle all administrative matters. She is the agent, and if you need to contact the institute if you have confidential information, you can go through her."

Obviously, this is already a very high level of attention.

"Mr. Yang and the comrades of the project team please rest assured and ensure that the task is completed!"

Chang Haonan also quickly expressed his stance at this time.

Seeing him subconsciously standing at attention, a slightly relaxed smile appeared on Yang Fenghata's originally serious face:

"Don't put too much pressure on yourself. As far as the requirements of Project 83 are concerned, the design of the leading edge slats is the icing on the cake. You can detect in advance the problem of aileron reversal when the aircraft is loaded with bombs. For this project, it is It’s already a huge contribution.”

Although Yang Fenghao himself believed that Chang Haonan was capable enough to complete this change, as the project leader, he still had to provide sufficient support in terms of psychological construction.

This support is individualized.

Some people are very poor at self-motivation, so some extra pressure must be applied to prevent them from working too hard.

Some people are the complete opposite. They often exert intensity on themselves and need to be given a relatively relaxed environment to maximize their effectiveness.

In Yang Fenghata's view, Chang Haonan obviously belongs to the latter.

"Don't worry, Mr. Yang, I have confidence in myself."

…

After the meeting, the entire 83 Project Team, like a sophisticated machine, started operating around the wing improvement plan proposed by Chang Haonan.

Yang Fenghata was very efficient. As the person in charge of the Eighth-Three Project, he certainly had very high privileges in resource allocation, so it only took him a few days to apply for the Dawn 1000 from the National Intelligent Computer Research and Development Center. Supercomputer usage time.

Chang Haonan himself used this time to write the user-defined functions (UDF) needed for the first stage of calculation in advance through Fluent's open user interface. When the supercomputer arrives, he only needs to compile the UDF and embed it into the shared library. , and then execute it directly.

As for future work, we need to wait until the first stage of calculations is completed before the mechanism changes.

All is ready except for the opportunity.