Chapter 969 Shocked France for a whole year!
at the same time.
Paris France.
Snecma Group.
Assistant Arthur Mondoc placed a test report on Ian Vista's desk:
"Doctor, this is the test report of the sample, please take a look."
Although Vesta had previously told Liu Yongquan that the test would not be fully completed until the end of this month.
But in fact, he still left himself some room for maneuver.
In fact, the testing work has entered the final stage, which is the working temperature test, since several days ago.
According to Vesta's schedule, if everything goes well, the results will be out in the next two days.
Once completed, the report can be signed and handed over to the Chinese, allowing them to start the next stage of research and development.
"Finally the results are out..."
He looked at the folder on the table and couldn't help but breathe a sigh of relief.
Next, I prepared to take a quick look at the results and then sign.
However, when Vesta was really about to open the report, he suddenly realized that his mentality at this moment seemed a little complicated.
On the one hand, the core engine of the M88-3 can be said to be the flagship product of the Snecma Group in the field of turbofan engines for at least the next 10-15 years. It would be best if everything goes well.
Especially if the SeA series of engines can break the monopoly of Rolls-Royce and Honeywell in the business jet field, Vesta himself, as the project leader, may also be able to make further progress within the company.
But on the other hand, he had a little bit of anticipation in his heart.
I hope that the Chinese design will make some mistakes in some unimportant places——
Since this report was sent to him, it means there must be no problems with the important parts.
The main thing is that the other party's design efficiency is really beyond common sense.
During the previous experience in China, Vesta even felt that all the professional experience he had accumulated over the past few decades had been challenged.
In this case, it seems more reasonable to have questions...
With this awkward feeling, he took a deep breath and suddenly opened the folder in front of him.
On the cover, there is only a title.
M88-3 Turbine Disc and Turbine Blade Sample Inspection Report
Vesta had already memorized the overall condition of the engine, so he skipped the nonsense such as the model introduction at the beginning and turned directly to the part about the test results.
"Dimensions, by..."
"Mass distribution, through..."
"Tensile strength in the cold state, measured by..."
"..."
"..."
As expected, several pages of content all met the requirements.
The results of some of the installed tests were somewhat different from those when the Chinese had previously tested the blades individually, but this was a normal difference caused by different working environments and did not exceed the specified performance range.
It can be said that even if one wants to find fault, there is not much room for maneuver.
"It's actually...really..."
Vesta sighed a little helplessly as he turned the pages.
He no longer knows how to organize his words.
The entire model, from design to production, completely exceeded his expectations.
The same goes for performance.
"Ok?"
Just as he was about to rebuild his mindset, he suddenly found a superscript in the upper right corner of the "Operating Temperature" entry on the next page.
Generally, this means there is something wrong that needs additional explanation with comments.
Vesta frowned, feeling somewhat conflicted.
However, his hands did not slow down at all, and he turned directly to the last page.
Generally speaking, the annotation content will be centrally marked here.
He soon found what he was looking for:
“Note 1: 1840K is not the maximum operating temperature of the sample, but it has met the test requirements. Further testing can only be carried out after the combustion equipment is replaced.”
“Not the highest operating temperature?”
Vesta hesitated for a moment, then raised her head and prepared to ask Mondok for details.
However, the latter had been paying attention to Vesta's situation for a long time, and before he could ask, he answered directly:
"At present, our test equipment can only achieve a stable combustion temperature of 1840K. If it is set above 1850K, the data will be very unstable."
"The engineer conducted a round of tests using the 1880K setting. The actual temperature fluctuated between 1820K and 1870K. The results showed that the samples submitted could withstand temperatures within this range under working conditions. However, because the conditions did not meet the test standards, they were not included in the report..."
After hearing this, Vesta was simply stunned.
"?"
"Does that mean our testing conditions are still too conservative?"
When setting the technical indicators of M88-3, both parties decided to increase the operating temperature by 100K, which Vesta thought was quite exaggerated.
After all, without replacing the turbine substrate, it is very difficult to achieve a temperature increase of more than 100K in front of the turbine by means of insulation and heat dissipation alone.
Basically, the cooling technology must be more than one generation different.
It would be relatively normal if the Chinese came up with a radical impact cooling solution or used a double-wall design.
But with the same air film cooling, there is such a big performance gap...
At least in past theories, it was almost impossible.
And now, the ironclad experimental results are right in front of him.
That can only mean one thing.
There was something wrong with the previous method of calculating film cooling.
"No wonder they design so fast..."
Vesta felt that he seemed to be close to the truth.
The Chinese should have developed a theoretical system of film cooling that is different from the current mainstream, thus surpassing other countries at the most basic research level.
Otherwise, if we rely solely on engineering experience, it would be impossible to surpass the old aviation powers in such a short period of time.
Mondoc, who was standing opposite, naturally had no idea about Vesta's brainstorming, and just answered the questions raised by the former step by step:
"Yes, but the test workshop told me that if we want to get a higher stable combustion temperature, we must either replace the fuel nozzle with a better atomization effect, or replace the fuel with a higher combustion temperature..."
Vesta waved her hand:
“更高温度暂时不急着测，M88-3和SeA650的涡轮前温度设定就是1830-1850K之间，测到1840K是符合设计标准的。”
"For now, it is enough to know that the air film cooling technology developed by the Chinese has the potential for further improvement..."
He spoke slowly while stroking his chin.
At present, due to the significant reduction in the expected number of M88-2 orders, coupled with the unexpected SeA project, Snecma is already facing a tight financial situation.
Therefore, for Vesta, as long as the task at hand can be completed, there is no need to create unnecessary trouble.
As for further work, it won’t be too late to do it after we see a return on investment from these two models.
"Doctor, since the test results are normal, should we report the situation to China Aviation Power Group... and of course Dassault?"
Seeing that Vesta was slow to give further instructions, Mondok had no choice but to ask.
“Dassault can be notified immediately so that they can prepare to test the Rafale in its F2 technical state. After the hot-end modification is completed, I estimate that it will be ready for installation soon…”
Vesta answered, tapping her fingers lightly on the table:
"We'll have to wait a few more days for Huaxia. I told them before that it would end around the 25th... It's not good to end too early..."
"clear."
Mondoc nodded, then turned and prepared to leave.
But Vesta called out from behind:
"and many more."
"PhD?"
Mondoc stopped.
"I remember that in addition to the Rafale, Dassault should also be promoting the Mirage 2000-2000, a deeply improved version of the Mirage 9, to several countries. Can you also ask them if there is any demand for further thrust increase of the M53 engine?"
As Vesta spoke, he pulled out a few sheets of paper from the small bookshelf next to him. On them were printed numerical calculation results, with a lot of handwritten notes next to them:
"I have roughly calculated that if we use the experience we gained from studying the M88-2 engine to improve the M53 engine, we can probably increase the thrust by about 5% without affecting stability and lifespan."
