Chapter 1018: Black Technology Prepared for A380?

Sharing the core engine means that the high-pressure compressor, combustion chamber and turbine are basically the same.

Of course, if the same core machine is in different working environments or has been upgraded, it is normal for the operating temperature to be somewhat different.

But the problem is that the difference between M88-2 and SeA650 is less than a year.

And 100℃, for the temperature in front of the turbine, is almost half a generation away.

Although it cannot be said that the higher the temperature in front of the turbine, the better the engine performance will be, but the correlation is indeed relatively strong.

So there must be something wrong here.

However, by this time, Norris had not fully realized the seriousness of the matter, and just guessed casually:

"Perhaps it's some new insulation coating they've developed?"

However, Professor Elinor just blew his beard and glared:

"That's ridiculous!"

He reached out and flicked the information hard, making a crisp snapping sound:

"Have you ever seen any coating that can increase heat resistance by 100°C in one go?"

"If there is such a thing, why should we study those alloy materials and active cooling technology?"

Facing the furious old professor, Norris also realized that his idea just now was a bit outrageous:

"Then...it is also possible that there are some hidden dangers that have not been resolved before M88-2, so in order to ensure reliability, the temperature in front of the turbine has been specially reduced."

"The problem was solved on the SeA650...or because the working environment of the passenger aircraft engine is relatively mild, the problem no longer exists, and the original design was restored..."

This explanation is obviously much more reasonable than the previous one.

Even Elinor lowered his head and pondered, seeming to be convinced.

But after about half a minute, he still shook his head:

"The M88 did reduce its working performance to ensure stability, but this was mainly a problem with the compressor. I knew some of the parameters of its prototype back then. The combustion chamber outlet temperature... followed by the two M88-1 and M88-2 The model difference is not big.”

At this time, the situation was a bit frozen.

"Forget it, go back to the office first, I have to take a good look at this thing..."

After some fruitless thinking, Professor Elinor took another step.

I completely forgot that I almost said "I don't think this thing is of much use" less than five minutes ago...

Anyway, it smells really good...

…

Soon, the two arrived at the office on the top floor of the headquarters.

Elinor took off his suit jacket, and without even having time to make a cup of coffee, he hurriedly sat back behind the desk and reopened the information in his hands to study.

but……

No clues were found.

After all, it's just a technical manual.

Liu Yongquan handed over almost all the technical information to Snecma, but he only had to teach it step by step. The latter had not yet fully grasped the design theory of the M88-3 engine.

Rolls-Royce's level is certainly higher than Dassault's, but it's impossible to see through everything based on just a piece of ambiguous information.

Moreover, there are only a few ways to increase the temperature in front of the vortex.

Most of them are unlikely to bring 100°C room for improvement.

Although the effect of replacing the turbine base material is obvious, the base material affects the whole body, affecting not only the high temperature resistance, but also other mechanical properties. It is almost necessary to recalculate the combustion chamber and turbine parts. It is impossible to It can be dealt with in a few months.

Then there's the new active cooling technology.

For example, when film cooling was first applied, it raised the temperature in front of the turbine to a whole new level.

If the new impact cooling technology is put into application, it can probably achieve similar results.

It will not affect the basic design of the engine itself, so the workload is relatively limited and it is not an exaggeration to complete it within one year.

But the problem is that neither France nor China seems to have conducted in-depth research in this area.

In addition, impingement cooling requires 10% or even a larger proportion of the air provided by the compressor to be used for cooling rather than propulsion, which in principle will lead to huge thrust losses.

It may even be possible to completely offset the increase in thrust brought about by the increase in temperature in front of the turbine...

However, the thrust performance of SeA650 is quite normal, and it does not seem like it has lost a lot of power gas...

Anyway, it's stuck.

Instead, Norris, who had been sitting on the sofa and thinking, suddenly had a flash of inspiration:

"Professor, I suddenly remembered that Dr. Lapworth mentioned a research result before. By modifying the internal channel design of the air film hole, the temperature resistance performance can be improved by about 80-100°C..."

Leah Lapworth is Head of Computational Sciences at Rolls-Royce and Head of the Computational Sciences Laboratory.

In addition to being responsible for connecting with various ongoing project teams and completing their computing needs, this laboratory is also responsible for certain cutting-edge technology research and development tasks.

"Is there such a thing?"

Elinor sat up straight at that time:

"But...I've never heard of it before?"

As an extremely mature technology, it is normal for the effect of air film cooling to improve as the research becomes more in-depth.

But to improve so much at once... it's a bit mind-boggling.

And if such a result really comes out, the influence should be not small.

Norris shrugged:

"Because the technology has been shelved."

Hearing this answer, Eleanor was very surprised:

"Why?"

Although the basic principles of air film cooling and impingement cooling are similar, the former uses the cooling air relatively normally and basically does not have particularly fatal defects.

Norris sighed lightly:

"Originally, it was planned to be used on the Trent 900 engine, which can reduce fuel consumption by about 5.5%, so that it can completely defeat the GP7200... But after the technology was really implemented, it was found that the complexity of both design and manufacturing was too high..."

Both the Trent 900 and GP7200 are the power prepared for the super giant Airbus A380 under development.

According to convention, the two models will be included in the A380 supplier list as optional equipment to avoid putting all eggs in one basket.

Having said that, if there is really a model that performs significantly better than the other, the user is not stupid and will definitely tend to choose the one with better performance.

In order to simplify logistics, many airlines will try to unify the engine brands in their fleets.

Therefore, if they can win the competition with GP7200, the benefits they will gain will not be as simple as a few hundred A380 engines or one or two thousand engines...

"So..."

Professor Eleanor was silent for a while, and then slowly said:

"If SeA650 can guarantee the delivery time and delivery volume, it means that the French... uh... or the Chinese are likely to have mastered the technology you mentioned... or similar technology?"

This question made Norris unable to react for a while.

After a moment of stunned silence, he realized that the other party had already recognized his speculation.

This made him less confident.

"No... Professor, I'm just speculating, not saying that they must..."

But before he finished speaking, he was interrupted by Eleanor:

"But at least for now, there are no other possibilities, right?"

"Hiss..."

Norris was speechless.

Obviously, Eleanor's logic is correct.

When all other possibilities are ruled out, the last one can only be temporarily regarded as the correct answer.

Eleanor closed the brochure in his hand and turned to the back cover.

"I see it says here... SeA650 will exhibit a 1:1 full-scale model at the European Business Aviation Show in Geneva next week."

He glanced at it and looked up at Norris:

"Hurry up and book a ticket. We'll go to Switzerland next week..."

"Ah?"

The latter was confused for a moment.

He originally just wanted to find Professor Eleanor to analyze this brochure, so why did he suddenly have to go on a business trip in the end?

"Don't stand there, go book a ticket!"

Looking at Norris who didn't respond, Eleanor reached out and knocked on the table to emphasize:

"There may be something there for us... uh... of course, including what you need!"