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

Although the online paper submission function in this era is very anti-human, and the school's Internet speed is very poor, after a lot of trouble, Chang Haonan still submitted the paper before the end of the day.

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

"How about we go out to have a meal together tonight?"

For players at the latter level, positions other than first action and communication are equally meaningless.

The core idea and most of the content of this article were completed by Chang Haonan, so there is obviously no reason to be the co-first author.

Therefore, she simply handed over the second work to another member of the project team quite generously, and she just put her name on it at the end.

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

So Chang Haonan planned to treat the other party to a meal as a courtesy to express his gratitude.

Apart from anything else, the work of polishing the paper alone would be worth at least several thousand dollars after more than ten years.

And it’s impossible to hire someone of this level to do it for you.

Xu Yang turned around, thought for a moment and tilted his head slightly:

"Okay, but... I want to try Lao Mo, how about it?"

The so-called "Lao Mo" is the first premium Russian-style Western restaurant open to the public in Beijing.

In the hearts of many Beijing residents of the older generation, he has a special status.

Of course, the price is also quite exaggerated.

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

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

After saying that, he picked up the phone receiver next to him and dialed Zhu Yadan.

"I thought you'd prefer somewhere a little more trendy like Maxim's."

"French food? I've eaten it many times with my tutor when I was studying abroad. It's nothing new..."

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

……

In the next few days, Chang Haonan's paper submission caused quite a stir.

Eight time zones away, Cranfield University, UK.

Professor Roger Elinor had just returned to the office from a morning meeting, made himself a cup of espresso, and was ready to start a new day of work.

After turning on the computer, he opened his school email as usual, preparing to see if there was anything that needed to be replied to.

At the top of the list are usually a few personal statements.

Cranfield University is not well-known outside the industry, and you can hardly see this name on any university ranking list——

Because it does not admit undergraduate students, it does not meet the "shortlist" requirements for most ranking lists.

But that doesn't mean Cranfield University isn't good enough.

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

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

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

He has participated in almost all key aerospace projects of Rolls-Royce.

Countless students apply to study here every year.

It's a pity that he has already selected the postgraduate quota for next year, and there will be no other opportunities.

Elinor rarely wastes time replying to these destined to be meaningless emails, but just puts them into the recycle bin.

Next, there are a few boring work emails whose contents can be guessed just by looking at the titles, and a review invitation from the editorial team of Computer Method in Applied Machnics and Enginering magazine.

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

But when the mouse pointer moved to the forward button, a keyword in the email title suddenly caught Elinor's attention.

“intergrid boundary definition method…”

The method of defining grid boundaries is exactly what he is currently studying.

As a senior consultant of Rolls-Royce, Elinor naturally participated in the research and development of the EJ2000 turbofan engine planned to be equipped with the EF200 fighter jet.

To be precise, he participated in the work of wiping the butt of the EJ200 engine.

When initially designing this model, confident British engineers continued the design of the RB199 engine in order to reduce weight as much as possible, without setting variable camber guide vanes at the low-pressure compressor inlet.

It should be said that with the experience of the previous RB199, Rolls-Royce engineers are already familiar with this. The excellent low-pressure compressor design replaces the role of the guide vanes in suppressing surge and reduces the weight to a considerable extent.

However, designers in the early years ignored a problem.

Compared with the RB199 installed on a fighter bomber/interceptor aircraft, the EJ200 is installed on several levels of maneuverability. Therefore, during flight, especially supersonic flight, the engine itself needs to withstand huge overloads.

In addition to the rectification function of the inlet guide vane, its fixed leading edge can also be used as a load-bearing member, forming a three-point support together with the two support points at the front and rear of the compressor rotor.

When the EJ200, which has eliminated this support point, flies under heavy overload, the low-pressure compressor rotor is at risk of wear and tear on the casing...

This problem has been going on for a long time, so much so that the first two prototypes of the EF2000 fighter jet could only be equipped with the old RB199 engine for test flights.

As a last resort, Professor Elinor, who was unwilling to participate in such a multinational cooperation project, had to be invited to handle the funeral affairs.

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

Only in the past, few people have studied low-pressure compressors from the structural and deformation dimensions.

After all, engines without leading edge support are generally high-bypass-ratio turbofans, which are mainly installed on passenger aircraft. It is impossible to perform crazy +9g maneuvers, so the overload capacity requirements of the engine are far less stringent than those of the EJ200.

At the beginning, Professor Elinor tried to proceed step by step, using the traditional finite volume method based on dynamic grids for structural calculations.

Then he discovered that the grid generation step alone would take about 8-9 months.

And every improvement plan needs to be done again.

This efficiency is obviously unsatisfactory.

Therefore, almost from the beginning, he realized that he had to build the wheel from scratch.

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

Therefore, when he saw an article studying the same content as himself, he was naturally very excited.

Although this article has just been submitted, CMAME is, after all, the top journal in the field of computational structural mechanics.

The articles that dare to be submitted here have passed the preliminary review by the editor, and it is almost impossible to be complete academic waste.

Elinor made up his mind that as long as this article could give him even a little inspiration, he would give a "direct publication" conclusion.

After waiting for seconds that seemed like years, the complete document content was finally presented to him.

“The grid nodes in the overlapping grid that participate in the flow field calculation are called active nodes, the grid nodes that do not participate in the flow field calculation are called inactive nodes, and the grid nodes that are responsible for the transmission of information between grids are called inter-grid interpolation Boundary point…”

"Using the combined parameter s of object-surface distance and grid scale as the criterion parameter for classification..."

"Unstructured overlapping grid?"

Elinor quickly found the point of the entire article.

"When an object moves or deforms, the unstructured mesh can make corresponding deformation adjustments according to certain model rules according to 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 what he understood.

"Isn't this just designed to solve my problem?"

Elinor told herself again and again not to be too happy.

Because he is afraid that this will be an empty joy, so that extreme joy will lead to sorrow.

But the hand holding the mouse trembled slightly, which still revealed his inner unrest.

Elinor would force himself to read almost every paragraph of text at least twice to avoid missing any key points or making mistakes in understanding.

However, the further back he looked, the faster he browsed.

The author's ideas are extremely smooth, and the theoretical derivation and numerical calculations are all done in one go. There is almost no part that requires him to ponder over and over again.

You know, this is a new concept that he has never been exposed to before.

To be able to write to this level, you must have extremely high academic skills.

Writing an article that is complicated and difficult to understand is not a skill, but making it understandable to people who read it for the first time is really awesome.

"Host unit search..."

"Hybrid Unstructured Grid Overlap..."

"Unstructured overlapping grid interpolation method..."

The more Elinor watched, the more excited he became. He had long forgotten about "don't open the champagne too early".

He is even sure that, according to the author's thinking, what follows this part should be an unsteady NS equation solving algorithm based on dynamic unstructured overlapping grids.

As long as you have read this part, at Elinor's level, it is not difficult to transform theory into practice and apply similar technologies to your own projects.

however.

When he turned to the next page of the document, what appeared was...

Conclusion……

This article is over...

Elinor was immediately stunned.

His mood was like reading a novel and had just reached the climax.

As a result, the chapter was broken!

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

After a while, the professor slapped the keyboard hard.

"Snapped--"

“fxxk——Why is it gone here?”

Thousands of dollars per day, please give me a monthly ticket! ! !