Although the online essay submission function in this era is very anti-human, and the school's Internet speed is also very sorry, after some tossing, Chang Haonan still submitted the paper before the end of the day.

After doing this series of things, Chang Haonan turned off the computer, briefly cleaned up the desk, picked up his coat from the hanger next to him, and called out to Xu Yang, who was also about to leave:

"Let's go out for dinner in the evening?"

For players in the latter rank, positions other than one work and communication are also meaningless.

And the core idea and most of the content of this article were completed by Chang Haonan, and the co-first author obviously has no reason to hang up.

Therefore, she simply gave the second work to another member of the project team quite generously, and she just hung up her name at the end.

But in terms of workload, she does contribute a lot.

So Chang Haonan politely planned to invite the other party to a meal to show his gratitude.

Not to mention anything else, just the work of paper polishing will be worth thousands of dollars after more than ten years.

And it's impossible to ask someone of this level to do it for you.

Xu Yang turned around, tilted his head slightly after a little thought:

"It's fine, but it'...... I want to try Lao Mo, how about it? ”

The so-called "Lao Mo" is the first special Russian-style Western restaurant in Beijing that is open to the outside world.

In the hearts of many older generations of Beijing people, it is regarded as a special existence.

Of course, the price is also quite exaggerated.

However, Chang Haonan, as the general manager of a second-tier state-owned enterprise, no longer cares much about the price, and nodded while putting on his coat:

"Of course you can, it's just a little far away, I'll let Zhu Yadan pick us up."

After speaking, he picked up the telephone receiver next to him and dialed Zhu Yadan.

"I thought you'd prefer something a little more modern like Maxim."

"French food, I ate it many times with my tutor when I was studying abroad, and it didn't feel new......

Chang Haonan locked the office door, went downstairs side by side with Xu Yang.

……

In the next few days, Chang Haonan's paper submission caused a lot of waves.

Eight time zones outside the UK, Cranfield University.

Professor Roger Elinor has just returned to the office from a morning meeting, making himself an espresso and ready to start his day.

After turning on the computer, he opened his school mailbox as usual, ready to see if there was anything to reply to.

At the top of the list, as usual, are a few personal statements.

Cranfield isn't a big name outside of industry, and you hardly get to see that name on any university's ranking list –

Since it does not admit undergraduates, it does not meet the "shortlisted" requirements for the vast majority of ranked lists.

But that doesn't mean Cranfield isn't up to par.

On the contrary, in terms of strength alone, its engineering and business schools are among the best.

Especially in the aviation major, the combination of theory and practice is extremely high.

Professor Elinor is a master in the field of aerodynamic structure design and performance analysis.

He has been involved in almost all of Rolls-Royce's major aviation development projects.

Every year, countless students apply to study with him.

It's a pity that he has already selected the graduate student quota for next year, and there are no other opportunities.

Elinor rarely wasted time replying to these doomed emails, just putting them in the recycle bin.

This was followed by a few boring work emails that you could guess by the headline, and an invitation to review from the editorial team of Computer Method in Applied Machnics and Enginering.

He subconsciously prepared to forward the mail to several of his doctoral students.

But just as the mouse pointer had already moved over the forward button, a keyword in the email header suddenly caught Elinor's attention.

“intergrid boundary definition method……”

How to define the boundaries of the grid, which is exactly what he's been working on lately.

As a senior advisor to Rolls-Royce, Elinor was naturally involved in the development of the EJ200 turbofan engine, which was planned to be the engine for the EF2000 fighter.

To be precise, he was involved in wiping the ass of the EJ200 engine.

When this model was originally designed, confident British engineers continued the design of the RB199 engine in order to reduce weight to the limit, without the variable curvature guide vanes at the inlet of the low-pressure compressor.

It should be said that with the experience of the previous RB199, Rolls-Royce's engineers are familiar with this, and the excellent low-pressure compressor design replaces the role of the guide vanes to suppress surge, and the weight is reduced to a considerable extent.

However, there was a problem that the designers of the early years overlooked.

Compared to the RB199 mounted on a fighter-bomber/interceptor, the EJ200 has several levels of maneuverability, so the engine itself needs to withstand huge overloads in flight, especially at supersonic speeds.

In addition to the rectification effect, the fixed leading edge part of the inlet guide vane can also be used as a load-bearing part, and the two support points in front and back of the compressor rotor together form a three-point support.

The EJ200, which has eliminated this support point, is at risk of wear and tear on the low-pressure compressor rotor and the receiver when flying with large overloads......

This problem has been tossed for so long that the first two prototypes of the EF2000 fighter can only be tested with the old RB199 engine.

As a last resort, Professor Elinor, who was reluctant to participate in such a multinational cooperation project, was invited to deal with the aftermath.

The rotation of compressor blades is a typical complex unsteady flow problem.

It's just that in the past, very few studies have been done on low-pressure compressors in terms of structure and deformation.

After all, the engines that generally do not have the leading edge support are large bypass ratio turbofans, which are mainly installed on passenger aircraft, and it is impossible to carry out any +9g crazy maneuvers, so the overload bearing requirements for the engine are far less demanding than those of the EJ200.

In the beginning, Professor Elinor tried to do the structural calculations step by step, using the traditional, dynamic grid-based finite volume method.

Then he found that the meshing process alone took about 8-9 months.

And every improvement needs to be done all over again.

Obviously, this efficiency is not likely to be satisfactory.

So, almost from the very beginning, he realized that he had to build a wheel from scratch.

But even for him, how could such a thing be caught?

Therefore, when he saw that there was an article working on the same content as his own, he was naturally quite excited.

Although this article is only newly submitted, CMAME is the top journal in the field of computational structural mechanics.

Articles that dare to be submitted here have passed the editor's preliminary review, and it is almost impossible to be complete academic waste.

Elinor was determined that if the article would give him even the slightest hint, he would give a conclusion that would be "published directly".

After a long wait, the complete document was finally presented to him.

"The grid nodes participating in the flow field calculation in the overlapping grid are called the active nodes, the grid nodes that do not participate in the flow field calculation are called the inactive nodes, and the grid nodes responsible for the information transfer between the grids are called the interpolation boundary points between the grids......"

"The combined parameter s of object surface distance and grid scale is used as the criterion parameter for classification......"

"Unstructured overlapping meshes?"

Elinor quickly found the point of the whole article.

"When an object is in motion or deformed, the unstructured mesh can make corresponding deformation adjustments according to a certain model rule according to the changes in the object boundary......"

“？？？”

With his pupils trembling, he read this paragraph over and over again several times, and finally determined that it was the meaning he understood.

"Isn't that what I'm trying to do?"

Eleanor repeatedly told himself not to be overly happy.

For he was afraid that it would be an empty joy, so that joy would give rise to sorrow.

But the hand holding the mouse trembled slightly, but it still revealed his inner unpeace.

Erinor forced himself to read almost every passage at least twice, so as not to miss any points or misunderstand.

However, the further back he looks, the faster he browses.

The author's thinking is extremely smooth, and the theoretical derivation and numerical calculations are all done in one go, and there is hardly any part that needs to be pondered by him.

You know, this was a new concept that he had never been exposed to before.

To be able to write to this extent, you must have a very high academic foundation.

It's not the ability to write the article redundant and difficult to understand, so that people who read it for the first time can understand it.

Host Unit Search ......

Hybrid Unstructured Mesh Overlapping ......

Unstructured Overlapping Mesh Interpolation Method ......

The more Elinor looked at it, the more excited he became, and he had long forgotten about the "don't open the champagne too early".

He could even be sure that, according to the author's idea, after this section, there should be an algorithm for solving the unsteady N-S equation based on dynamic unstructured overlapping meshes.

As long as you have read this part, at the level of Elinor, it is not difficult to translate theory into practice and apply similar techniques to your own projects.

However.

When he turned to the next page of the document, it turned out to be ......

Conclusion……

This article is over......

Elinor's whole person was directly stunned.

His mood was like reading a book, just seeing the climax part.

As a result, out of context!

At this moment, he even had the urge to take a knife and cut the author along the network cable.

After a long moment, the professor slapped his palm on the keyboard.

"Smack-"

"FXXK - how did you get to this point and it's gone?"

It's ten thousand days, ask for a wave of monthly passes!!

(End of chapter)