If Chang Haonan just said this idea, it could only be regarded as "daring to think" at most.

But judging from the relevant statements about the manufacture of compressor blades and turbine blades, he is definitely not talking nonsense.

At the very least, it can be attested that he has studied these seemingly unrelated fields in the field of aerodynamics.

To be able to do this step can actually be said to be standing at the top of the pyramid.

And his remark that "as long as you master the basic theories and methodologies, you can conduct broader cross-border research" made the four senior experts opposite have a sense of openness.

And Director Zhou of the Commission of Science, Technology and Industry for National Defense instantly felt that he had picked up a treasure.

As the department in charge of the scientific research and production of aviation and shipbuilding and military products, and the department that plans, co-ordinates, and connects national defense scientific research, production, and construction, the Third Department of Systems Engineering needs such an all-round talent who can guide in the general direction.

She even had the urge to let Jinghang University directly assign him to the Commission of Science, Technology and Industry for National Defense after graduation.

But reason told her that now was not the time.

No matter how beautiful it is, in the field of engineering and technology, it is impossible to convince the public by relying on paper talk.

If you can't make anything, it's all for nothing.

Therefore, the young genius in front of him still needs to go through the experience of specific model projects.

Thinking of this, Director Zhou looked at Yang Fengfa next to him.

As the chief model engineer, the latter considers things that are obviously more specific and practical.

Although he also saw Chang Haonan's talent, he continued to ask his own questions.

"Comrade Xiao Chang, in the idea you just mentioned, you should need to rely on a lot of numerical calculation methods, but for some problems such as complex flow fields, have you considered the amount of computation required for numerical simulation process?"

This may sound like a bit of a bargain, but it's actually very practical.

It was June 1996, and six months later, in December 1996, Intel would build the best-performing supercomputer at the time, ASCI Red, with a computing speed of 1.338 trillion operations per second.

On the Huaxia side, the fastest supercomputer in 1996 was the Dawning 1000A, with a measly 4 billion calculations per second.

For comparison, before Chang Haonan's rebirth, the A15 processor on the iPhone 14 phone had a computing speed of 15.8 trillion times per second.

One mobile phone is equivalent to 12 of the world's best supercomputers.

So the amount of computation is really a problem that has to be considered.

But this obviously can't stump Chang Haonan, who has been prepared for this for a long time.

"Of course I did."

Chang Haonan stood up directly this time, walked to a blackboard on the side wall, and picked up a piece of chalk casually.

"Since you mentioned the problem of numerical simulation of complex flow fields, let's take the problem of delta wing oscillation motion under a dynamic flow field at high angles of attack as an example."

Yang Feng's eyebrows were raised, and he subconsciously sat up straight.

Chang Haonan did not choose this issue as an example.

This is a very valuable question for the ongoing J-8-3 project.

And Yang Fenghata himself on the opposite side is very proficient in aerodynamic analysis at large angles of attack.

So he's going to be interested.

Of course, the identity of the chief designer of J-8-3 has not been publicly publicized at this time, and he was only introduced as an expert from the 601 Institute in the opening stage just now, so Chang Haonan ostensibly chose this question just because of the other party's question just now.

"If the CFD method is used to directly calculate the dynamic flow field at the high angle of attack, then the computational resources and calculation period required will be large, so a simpler model that can directly predict the important characteristics of the system is needed instead, that is, the model reduction ......"

"Therefore, with reference to the nonlinear identification and modeling process of electronic circuits, I designed a signal-based reduced-order model, the Volterra series model, the basic principle of which is that for the discrete Volterra series in the time domain, the output y(n) of any input u(n) can be represented by the following way......"

Chang Haonan said and wrote a long multiconvolution on the blackboard.

"It can be seen that if all the Volterra kernels of the system are obtained, then the response of any input of the system can be obtained, considering that the length of the series and the length of the model memory increase rapidly with the increase of the kernel order, which is not conducive to the identification of the Volterra kernels, so the part above the second order is truncated, and then the remaining Volterra cores are wavelet compressed......"

After he erased the blackboard for the sixth time and refilled it, this down-order method that greatly simplified the calculation process was finally finished.

Liang Zhuoping, who has been out of technical positions for a long time, and Director Zhou are more at a loss on their faces.

But Du Yishan and Yang Feng's eyes were almost full of ...... A feeding frenzy.

The calculation of the flow field of a delta-wing aircraft is inherently much more complex than that of a straight wing.

Not to mention numerical calculations, even just analyzing them is quite difficult.

So it's all about experience.

And if you want to gain experience, you have to burn money for a lot of wind tunnel testing and test flights.

It will also take a lot of time.

If the downgrading model that Chang Haonan just wrote on the blackboard can work, it can undoubtedly save a lot of trial and error and hitting a wall.

This is simply tailor-made for the J-8-3.

And it's a completely new engineering model.

Even, this time it can be said that it is an engineering theory.

Because this idea of downgrading the model is not limited to the Volterra series, it can be generalized to more fields.

Of course, this still needs to be verified.

However, with the foundation of the previous 603 project, everyone is still optimistic about the verification results.

In other words, within a month, Chang Haonan has twice come up with groundbreaking results.

This undoubtedly shows that the "mastery of basic theories and methodologicals" mentioned earlier is not groundless.

It's just that some theories may need to be developed by him himself.

Yang Fengyuan had an idea at this time:

I'm going to decide on this man!

He turned his head and looked at the other three.

All were answered in the affirmative.

"Comrade Xiao Chang, there is now a key national defense project handed over to Academician Du's research group, are you interested in participating in this project?"

Although judging from Du Yishan's description and the contact with Chang Haonan just now, Yang Fengwan is basically 100% sure that the latter will agree, but the process will eventually go.

"Before you make a decision, we need to explain that if you choose to participate in this project, there will be certain restrictions on future work, going abroad and publishing results......

Chang Haonan naturally knows these things very well, after all, his actual time working in Huaxia Aviation Industry is actually not shorter than Yang Fenghat.

So after the other party finished speaking, he chose to agree almost without thinking, and then signed an informed document.

"So, Xiao Chang."

After Chang Haonan signed his name, Du Yishan left his seat and walked in front of him:

"The organization has decided that you and Xiaoyao will jointly represent our research group to participate in the research and development of the 83 Project!"