Chapter 1080 We Can only Go Back to the Chinese

For those who have not participated in the turbofan 10 project establishment process, what Chang Haonan told can be said to be a horror story——

Did you co-author the turbofan 10, which has reached the upper limit of mass-produced military aviation engines, or was it just someone else who stopped tinkering with it?

Several big guys in the materials field were even more ashamed.

Although Chang Haonan didn't say it, everyone knew it was clear in their hearts.

The reason why compromises were made on the basis of advanced structures and even reverse optimization was largely due to the limitations of aviation materials.

Although the field of materials, especially the field of composite materials, has made certain progress in recent years, it is obvious that compared with the needs of the application side, it is still somewhat behind...

Jiang Fuhe, who was sitting in the second row, could only respond with a wry smile.

It was Chang Haonan who almost suddenly came up with the design of the Turbofan 10, and even left enough room for the future development of a fourth-generation engine, which forced him and the Gas Turbine Research Institute to give up the high-promotion preliminary research at hand. project, turning to research on vertical take-off and landing technology.

Although it can be regarded as a way out, everyone knows that China must use large aircraft carriers as the core of ocean warfare in the future. There is no all-out nuclear war during the Cold War, and there is no operational scenario that foresees the destruction of all airports. There is no single The Marine Corps as a branch of the military.

A pure vertical take-off and landing model...it can only be said that the future is uncertain.

Of course, Institute 624 has not been sitting still over the years, and has also conducted a lot of research on thrust vector nozzles and related control logic.

But compared with the complete aircraft engine model, these are details after all.

"Install the intercooler on the compressor stator..."

Liu Zhenxiang, who was in the front row, whispered again:

"If I had heard this idea two hours ago, I would have called it whimsical... But now, I'm not so sure..."

As he spoke, he smiled half wryly and shook his head in relief.

Just now, for a moment, he suddenly realized that maybe it was time for people of his generation to use their remaining energy...

But now is definitely not the time for emo.

Therefore, he quickly got over the initial shock.

After all, it is a project preparation meeting, not a simple pre-research.

In addition to the technical route, there are more specific issues that need to be discussed:

"Comrade Haonan, you just said that using a dividing wall heat exchanger for direct heat exchange of hot and cold end airflow, will this affect the heat recovery or even the efficiency of the film cooling system?"

This time, Chang Haonan nodded very simply:

"To a certain extent... it does."

"Actually, my original plan was to use supercritical carbon dioxide as a heat exchange intermediate medium to transfer heat in the system... However, in principle, our research on the properties of supercritical fluids is not mature enough, so we rashly added into the system may bring immeasurable risks.”

"On the other hand, in engineering, driving the circulating flow of the intermediate medium requires external power input, and although carbon dioxide can easily reach a supercritical state, it also requires more than 75 atmospheric pressures, even much higher than the normal working pressure inside the turbine, and even more Needless to say, the compressor part has a relatively mild environment, so in order to ensure the structural integrity of the heat exchanger, additional metal tube walls of sufficient strength need to be installed..."

"Although large-bypass-ratio aviation engines do not particularly pursue thrust-to-weight ratio, for the AE1500, a model with a thrust of less than 15 tons, it is still a bit difficult to fully accommodate such a set of things... In fact, in order to offset the current coldness in the suite, "

"That's why I said before that at this stage, I plan to focus on the intercooler. As for the complete intercooler heat exchange equipment, it is more suitable for use in models with greater thrust. For example, 30 tons like the Trent 900 On top of the aircraft engine..."

It's hard to say whether it was intentional or unintentional, but Chang Haonan revealed his greater ambitions at this moment.

AE1500 is definitely not the end...

The project preparation meeting can only be regarded as the starting point of a huge project.

In the following days, the expert group reviewed various documents and preparations prepared by Haofei Group in stages.

Finally, on May 31, 2003, the Aerodynamic Group’s AE1500 large bypass ratio turbofan engine project request was officially approved.

Moreover, it is extremely rare that Comrade Chang Haonan serves as the chief engineer and chief designer at the same time, single-handedly taking charge of this model with high hopes.

This seems to be seen as some kind of signal released after the establishment of the Industrial and Construction Committee...

…

And in these days when Chang Haonan gradually devoted himself to new projects.

Some of his previous arrangements are gradually being tightened...

France, Paris.

Dassault Aviation headquarters.

Charles Edelsteiner was in his office, listening to his assistant report on the test flights of the Falcon 8Z prototype in the past month, as well as the test and promotion plans for the second half of the year.

Overall, it went very smoothly.

Except for a few test subjects that require the cooperation of meteorological conditions, the rest are basically completed in one pass.

Even the most optimistic timetable before, no one dared to think of this kind of scenario.

So that this model may be put into commercial operation in late 2003 or early 2004.

For this reason, the project team even plans to conduct ultra-long-range tests for publicity purposes in advance.

Of course, as part of the test flight project, it is definitely impossible to touch the extreme range in one step.

Therefore, the plan is to start with the 9,000-kilometer Paris-Los Angeles route and gradually increase to the final 12,000-kilometer Beijing-New York route.

"Wait..."

Hearing this, Edsteiner suddenly interrupted:

"Can't Paris be used as the center of the range test? That is, take off from Paris and fly to different destinations..."

He has always felt that the Falcon Z project has too much Chinese color.

However, at this point, it is definitely impossible to get rid of Chinese influence in technology.

But the French color of the Falcon 8Z at the commercial level can be increased as much as possible.

At least let the market realize that this is a Dassault aircraft.

However, the assistant shook his head:

"The mainstream routes of business jets are the few regional central cities in the world. Paris is too close to these places... It is less than 9,000 kilometers to the west coast of the United States, and even less than 10,000 kilometers to Asia and South Africa. Sydney is too far away, more than 16,000 kilometers..."

Modern business activities, even after the United States replaced Britain as the new world hegemon, still centered on Europe for a long time.

This unique location feature is generally treated as an advantage, but today, it played a little joke on Edsteiner.

Just when he wanted to say something else, a figure suddenly appeared at the door of the office.

Edsteiner looked up and noticed that the person was Didier Casore, the head of Dassault's aerodynamics department and the person in charge of the overall design of the Falcon Z project.

In the past half a month, the other party has been in contact with the Ericsson team in Sweden according to his arrangement to verify the possibility of installing a complete "Ericsson" early warning system with the Falcon 8Z as the carrier.

Now that he suddenly appeared here, there is a high probability that there is a result.

Considering that the Falcon Z itself was almost a done deal, Edsteiner thought for a moment and temporarily stopped communicating with his assistant, then quickly stood up and invited Casore in.

"Didier, the Swedes..."

Edsteiner asked anxiously before he even had time to sit back in his chair.

But he stopped talking before he finished.

Because, judging from the other party's expression, the result might not be optimistic.

Sure enough, Casore opened his briefcase, took out a thick report from it, and placed it in front of Edsteiner:

"From the perspective of payload weight alone, even the complete version of the Erieye system does not exceed 4.5 tons, and even the smaller Falcon 7Z can be carried."

"But the antenna design scheme given by the Swedish side is not optimistic. The balance beam antenna designed with an active phased array is not small in size and weight. It is not a big problem for the lower-speed Saab 340 and 2000, but if it is installed on our Falcon 8Z, I am afraid that the wing stabilizer design and most of the fuselage structure will have to be greatly modified..."

"However, considering that the main wing airfoil of the aircraft is optimized by China, if we can get their support, I think it won't take too long..."

Edsteiner's expression gradually became stiff.

Especially when he heard the last sentence-

As Casore said, if China can support it, this improvement may not take too long.

But the problem is, didn’t I want to cooperate with the Swedes in the first place because I didn’t want to be controlled by the Chinese?