After the successful completion of the handover of work, Chang Haonan flew back to Shengjing directly with the test data.

Next, it is time to design and optimize the structure of the turbofan 10 compressor.

The active control technology he developed for the split flow of the blades performed even better than expected on the last three stages of the 9A-02 prototype by about 8-10 percent.

From a research point of view alone, this is certainly a good thing.

When improving the turbofan 9A, according to general engineering experience, Chang Haonan set aside about 15% margin on the basis of numerical calculations.

But as it turned out, there was too much left.

With the upgrade, the new version of TORCH Multiphysics is even more accurate for the simulation of general turbomachinery.

However, in the case of the turbofan 10 project, this means that some of the previous calculations need to be corrected -

Since the air intakes of the J-10 and J-11 are calibrated at a level with a high boost capacity, the total boost ratio of the turbofan 10 cannot be too high.

Chang Haonan's previous design point was 25-25.5.

This value can strike a relatively good balance between the two aircraft models, as well as between low-speed and high-speed performance.

But if it is 10% higher, then the actual boost ratio of the compressor will reach the level of 28, which will inevitably affect the supersonic capabilities of both aircraft.

Therefore, it is necessary to adjust the design of compressor blades, especially the design of active separation control, to be more conservative.

Even in the history of aviation development in the world, this is almost a unique problem.

After all, in the vast majority of cases, researchers are faced with a problem where the boost ratio is not high enough......

Fortunately, although this work is troublesome, it is not difficult, and it should not take too long when the manpower and computing resources are relatively sufficient.

It was still the Jetta King who took Chang Haonan from Taoxian Airport to 606.

The car was parked steadily in the square in front of the main building.

Also parked here, there is also a "Shenfei" bus.

About a dozen people in suits were lining up next to them, apparently waiting to get on the bus.

It's not a very common scene.

In the institute, unless there is a formal occasion or a leader who comes up to inspect, few people will dress so formally.

After all, it is really uncomfortable to dress up like a suit and leather shoes.

Just when Chang Haonan was curious, he found that there were many acquaintances in the crowd.

I met when I was engaged in vortex jet 14 before.

Moreover, they did not join the turbofan 10 project, but continued to engage in flight refueling.

Probably there was some important activity on the side of the aeronautical gas turbine.

They have all followed Chang Haonan to do projects from the beginning, and naturally someone quickly recognized Chang Haonan.

"Mr. Chang!"

"Always good!"

For a while, the sounds of greetings and greetings came and went.

Now that he has been recognized, Chang Haonan also asked directly.

"What's important to you? Are you all dressed so formally? ”

"Also, why didn't you see Mr. Yan?"

These questions have attracted a burst of contemplation.

"Mr. Chang, you don't know?"

After a brief pause, one of the relatively young engineers replied:

"As one of the three main pavilions, we were invited to participate in the Asian Airshow in Singapore next week, so we have a large delegation above, and we are all accompanying technicians."

"As for Mr. Yan...... He definitely can't go abroad casually, and the progress of the aeronautical conversion to gas turbine for power generation is still a little nervous, and he needs to stay in charge. ”

It's all about a large backpack that is half a person tall on the whole shoulder.

Morphologically, it should be empty.

This is not surprising.

This kind of official travel is definitely indispensable for purchasing some foreign goods.

didn't drive the transport plane directly to buy the goods, which was already a lot of face for the customs.

Of course, a secondary reason is that Huaxia does not have a large enough domestic transport aircraft to participate in the exhibition.

"I've been testing in 624 ravines and ravines during this time, and I really haven't heard of it."

Chang Haonan was a little embarrassed, he didn't know anything about such a big news:

"But...... What is this main pavilion? ”

"It's not just in time for the financial crisis, and the economic situation in Singapore is not very optimistic, so this year's venue size and specifications have been reduced, and there is no way to provide all exhibitors with a large enough outdoor exhibition area."

"But the United States, France and us are the exception, each with a fifth of the total area."

So what this means is...... QC130 gas turbine also going to the exhibition? ”

Hearing this news, Chang Haonan was still quite excited.

The Asian Airshow in Singapore is one of the relatively successful of the emerging air shows in the post-Cold War era.

Of course, it is still significantly weaker than those old air shows in Europe.

However, for the Huaxia aviation industry, which has just begun to go global, this stage is not small.

And more importantly, the Singapore Airshow will attract more attention from third world countries such as Southeast Asia due to its geographical conditions.

And at least for a short time, they will also be the main target customers of Huaxia's arms sales.

"There was a plan."

Another female comrade, who was a little shorter, said with a somewhat regretful expression:

"However, QC130 manufactured a total of two prototypes, all of which were sent to the 708 Institute for technical verification, and it was really impossible to take out the prototype for exhibition, and finally it became a 1:1 plastic model......

"In the past, we mainly worked with the representative comrades of the 410 factory to provide technical support for the J-7F exhibited in the exhibition, as well as the FTC2000, that is, the J-9 of Guihang."

Chang Haonan immediately understood.

Both aircraft are powered by turbojet 14B engines.

As a model that has only been finalized for a year, for the sake of insurance, it is definitely necessary to bring some more technical strength over just in case.

"Didn't the J-8C say it was going over?"

Naturally, it was impossible for him to forget the first model that he really participated in the development of after his rebirth.

"No, I guess Sheng Fei has also given up on that export model. It's almost the 21st century, and I'm afraid that few countries still need an interceptor, even if it's a multi-purpose interceptor. ”

It makes sense.

Moreover, even if an interceptor is needed, the MiG-25 on the Russian side is almost being sold at the price of scrap, and the cost performance is really against the sky.

Chang Haonan originally wanted to ask what the people who went to the exhibition this time were.

As a result, before he could ask, someone with high interest gave an answer in advance:

"As far as I know, our main products in the past should be the MA60 passenger aircraft, which is about to complete the approval process and start delivery, as well as the export model of the J-7, FBC1."

"In addition, it is exhibited in the name of a jointly developed model, but in fact it is still the original C808/Tu-334 of the original Tupolev."

Figure 334, Chang Haonan has naturally been paying attention.

After the two sides signed the contract, Tupolev's actions were neat, but Hufei had never been in contact with the Russian side's technical data before, and although the Tu-334 was a regional airliner, it was designed and generated according to the standard of a trunk airliner, so the speed of digestion and absorption was definitely not as fast as Project 11.

Now it just so happens that the Russian side is not the main pavilion, so the exhibition area is not enough.

Painting Figure 334 with the national flags of the two countries and stuffing it into Huaxia for display can be regarded as a win-win situation.

"In addition to these three, there may be nothing left, the two fighters I just mentioned, as well as the helicopters imported and produced from France in Bingcheng, the Chujiao 6 and the Qiang 5 produced by Hongdu......"

The other party crossed his fingers and counted again:

"The variety is not small, but I heard that the United States will bring the latest F18F carrier-based aircraft that has just made its first flight for a short time this time, and France will also exhibit a prototype of Rafale, so it seems that our formation is not enough......"

Speaking of which, the mood of the crowd is inevitably a little lost.

In peacetime, air shows and defense exhibitions are the front line of confrontation between the aviation industries of various countries.

Although they will play some tricks, generally speaking, who wins and who loses, everyone still has a rod and scale in their hearts.

"Two of the latest third-generation fighter jets......"

Of course, Chang Haonan can't shake off his development plan for the two main models of J-10 and J-11, so he can only encourage in a determined tone:

"Last year, the J-10 has already been test-flown and I estimate that our own third-generation aircraft was officially unveiled, that is, in recent years!"

(End of chapter)