Chapter 1219 Strange Compressor and Strange Data
When the translator conveyed Ren Bingda’s answer to Bodi, the latter’s expression even showed confusion for a moment.
Then he turned his head and glanced at Ren Bingda next to him.
I found that the other party looked normal and didn't seem to be joking.
“Yourselves?”
He tentatively confirmed again.
“That’s right.”
Ren Bingda showed a reasonable expression:
“Since it is an industry standard proposed by China, then as a Chinese enterprise, we should naturally Be the first to set an example.”
This time, Bodi didn’t respond immediately. He just picked up the water glass and pretended to drink water with his eyelids lowered.
But even from Ren Bingda's perspective, it can be seen that the water level in the cup has not changed for a long time.
Obviously taking the opportunity to think about countermeasures.
This is actually true.
As a technician-turned-supervisor, Bodi almost instinctively began to think, if the Chinese are serious, is it possible to achieve it by simply modifying existing models, or at least in Fulfill the other party's requirements on paper.
The energy consumption and emission tests of aviation engines are the same as those of automobiles, and there are many specially developed "test-taking" techniques.
It’s impossible for anyone to follow a flying plane to check its emissions anyway, so as long as it can pass the testing process, everything will be fine.
But this is like a final exam in college. The paper score cannot be too far from the passing mark.
Otherwise, even if the teacher intends to save him, he may not be able to get him back.
After some thinking, Bodi came to the conclusion that-
It’s difficult.
The Trent 900 is already one of the models with the lowest unit emissions and fuel consumption in the aviation industry, and even met the data specified in the CAEP6 standard three years in advance.
Including the NGME project he is currently responsible for, it is also designed around the requirements of CAEP6.
There are only three ways to further improve efficiency and reduce emissions.
First, work hard to achieve miracles, continue to increase the temperature in front of the turbine, reduce fuel consumption per unit of thrust, and suppress the generation of thermal nitrogen oxides.
The second is to improve the combustion chamber structure to fully premix fuel and air as much as possible to improve the fullness of combustion and reduce the generation of rapid nitrogen oxides.
The third is to directly change the fuel, such as burning aviation kerosene to burning methane or hydrogen, to solve all problems in principle.
But no matter which one, it is easier said than done.
At least they need to start from scratch and design a new core aircraft engine.
It is not an effect that can be achieved by tinkering with existing models.
After thinking about this, Bodi relaxed.
He naturally knows that the Chinese people do have some special skills in the field of aviation engine design and manufacturing, otherwise the two parties would not have a series of cooperation that continues to this day.
But a unique skill is a unique skill.
The above three items are all the ultimate test of the basic skills of aviation engine design.
Taking the combustion chamber structure as an example, Rolls-Royce used a three-ring cavity structure and a total of 90 fuel premixing nozzles of different sizes on the new generation product based on the plan of GE next door, through 12-way fuel control. The valve realizes combustion control, accurately adjusts the combustion mode in the combustion chamber under different power conditions, and adopts a newly designed branch-tube combustion chamber structure to provide sufficient combustion space for premixed combustion.
Although Bodi has not seen the specific structures of several self-developed aircraft developed by China, considering that at the turn of the century they also introduced and produced PS90A and D436, two aircraft with technical levels in the early to mid-1990s. Fa, it is hard to believe that the other party can achieve a lead at the basic level in just five or six years.
This is not to mention the difficulties at the production level.
Although Rolls-Royce's technical department has not yet figured out how to process the air film holes of the Trent 900 turbine blades, it is certain that China still does not have the ability to produce the blade bodies.
In short, like many of their other industries, it obviously bears traces of very uneven development.
Of course, considering the past experience of Panos Watson being hit by a boomerang, Bodi is not prepared to say anything to death.
But decided to wait and see what happens.
"Okay..."
He put the still almost full cup back on the table:
"Although I still think this choice is a bit too radical, I still wish you all the best. Smoothly, and if necessary, we are also willing to provide partners with..."
Ren Bingda could hear that this was the rhythm that he was no longer prepared to continue to dwell on this topic.
Obviously after a round of analysis, Bodi did not think that he could really come up with products that met the new standards.
In fact, to a certain extent, the latter speculation is indeed correct.
Since the domestically produced turbofan 20 is intended for military use, some standards have been relaxed in terms of emissions and fuel economy.
If the AE1500 wants to achieve its goal of being put on the market before 2010, it will need help and cooperation from Rolls-Royce.
This is why Chang always sets such high standards for reception for Bodi.
However, the cooperation methods of some previous models such as M88, Sea650, Trent 900... are all different.
This time, everything from model to technology needs to be focused on China.
Therefore, Ren Bingda had already prepared the draft. He was not in a hurry to argue with Bodie, but continued to talk about some innocuous topics.
Then when both parties were silent, the conversation suddenly changed:
"Mr. Purdy, I think you have almost rested. Next, based on the principle of reciprocity, there is an itinerary to visit our R&D center..."
The so-called principle of reciprocity refers to the fact that when Ren Bingda went on a business trip to Luoluo, the latter also opened part of its research and development area to him.
Now that we are reciprocating the courtesy, we naturally have to express our return.
Podi didn't make any movement on his face, he just subconsciously raised his eyebrows.
On the itinerary provided by China in advance, there is indeed an item of "visiting the production and R&D center".
But because they were written together, he thought that he had finished visiting the factory area before.
I didn’t expect that there would be a separate program later.
……
The development process of aero engines involves many factors. The entire industry chain includes hundreds of midstream and upstream suppliers and cooperative units, and the departments involved in R&D work are even more numerous.
The so-called "R&D center" that Ren Bingda took Bodi to visit was actually a testing workshop.
It is also relatively easy to reflect product performance without being too sensitive.
The group of people left the conference room, put on their work clothes outside, and soon arrived at a three-story building next door.
More than a dozen technicians dressed in the same uniform are gathered around a hanger-type equipment, and they appear to be performing performance tests on engine components of a certain model.
It’s just that the distance is too far and I can’t see clearly what it is.
There is a row of railings behind the operating desk, with a yellow and black warning sign hanging on it.
Body can't read Chinese, but it's not difficult to guess from the huge exclamation mark and symbol logo, which should mean please stay away and pay attention to hot surfaces.
Ren Bingda stopped, turned around and introduced to the British delegation behind him:
"Gentlemen, our technicians are testing the cycle performance of the new high bypass ratio turbofan engine. You can do this without disturbing them. Under the premise of working, feel free to visit in the blue ground area..."
Hearing this, Bodi just saw that what was hanging on the hanger should be a set of blades of a high-pressure compressor. .
However, the appearance is different from any other common similar products.
He originally thought that this trip was just a routine matter, but now he became interested instantly.
The entire test workshop is very large, with almost twenty groups of workstations. However, perhaps because it is already off-duty time, or perhaps specifically to welcome visitors, less than half of them are in a working state.
And only about one-third of them are operated or observed by staff.
Although these workbenches are also outside the blue zone where they can move freely, they are not as strictly guarded as the components under test themselves.
At least it is not difficult to see what is displayed on the screen when you walk by.
After realizing this, Bodi immediately expressed that he wanted to take a look, and then walked around the workshop pretending to be casual.
We didn’t stop anywhere intentionally during the whole journey, and we even asked the escorts some innocuous questions from time to time.
But his eyes kept glancing at the screens on both sides.
Hard work pays off.
On a computer deep in the workshop, he actually saw a page that he was very familiar with -
That was the online gas composition detection software from the Swiss Rodronik company. .
Previously, the same equipment was used to detect exhaust emissions during ground tests and flight tests of the Trent 900.
So Bodi recognized it with just a glance.
Obviously, the Chinese people are indeed paying attention to aviation emission reduction technology.
I just don’t know the specific progress.
The software is running at this time. It looks like the operator started the data processing program and then freed his hands to do other things.
Only then did Bodi seize the opportunity.
Sure enough, the man following him turned pale, and then made a gesture to the other engineer.
The latter understood immediately, and quickly came to the computer in three steps and two steps at a time, and switched the software window to the minimized state.
This set of actions went smoothly, but Bodi still recorded the voltage data corresponding to the RS325 and HC402 probes.
Rollo is also using the same probe and analysis program. As long as it is calibrated using nitrogen data, it can roughly calculate the gas concentration corresponding to this specific voltage.
Of course, there will be slight differences in composition between the air in the UK and the air in China, but it will not have a significant impact on the results.
After receiving this unexpected surprise, Bodi was also worried that he would forget the two sets of numbers later, so the entire subsequent process was a little absent-minded.
In the end, he even excused himself from feeling unwell and offered to end today’s trip early...
(End of this chapter)