Chapter 520 Singapore Airshow, main exhibition groups

After successfully completing the work handover, Chang Haonan flew directly back to Shengjing with the test data.

The next step is to design and optimize the structure of the turbofan 10 compressor.

The blade separation flow active control technology he developed performed even better than expected on the final three-stage high-pressure compressor of the 9A-02 prototype by about 8-10%.

From a research perspective alone, this is certainly a good thing.

When improving the turbofan 9A, following general engineering experience, Chang Haonan left a margin of about 15% based on numerical calculations.

But it turned out to be too much.

After the upgrade, the new version of TORCH Multiphysics has improved its simulation accuracy for general turbine machinery.

However, when it comes to the Turbofan 10 project, this means that some previous calculations need to be corrected——

Since the inlets of the J-10 and J-11 are calibrated at a high level of boost capability, the total boost ratio of the turbofan 10 cannot be too high.

The design point Chang Haonan set before was 25-25.5.

This value can achieve 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, the actual boost ratio of the compressor will reach a level of 28, which will inevitably affect the supersonic capabilities of both aircraft.

Therefore, the compressor blade design, especially the active separation control design, needs to be adjusted more conservatively.

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

After all, in most cases, the problem faced by researchers is that the boost ratio is not high enough...

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

It was the same Jetta King that took Chang Haonan from Taoxian Airport to the 606th Institute.

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

Also parked here is a "Shenyang Fei" passenger bus.

About a dozen people in suits were lining up nearby, obviously waiting to get on the bus.

This is a rare scene.

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

After all, wearing a suit and leather shoes is really uncomfortable.

Just when Chang Haonan was curious, he discovered that there were many familiar people in the crowd.

We all met when we were working on Turbojet 14 before.

Moreover, none of them joined the Turbofan 10 project, but continued to engage in aeroderivative combustion.

There is probably some important activity at the aeroderivative gas turbine.

They had all worked on projects with Chang Haonan from the beginning, so naturally some people recognized Chang Haonan very quickly.

"Mr. Chang!"

"Hello, Mr. Chang!"

For a time, the voices of greetings and greetings came one after another.

Now that he had been recognized, Chang Haonan asked directly.

"What important event are you on? Are you all dressed so formally?"

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

These questions caused a moment of confusion.

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

After a short silence, one of the relatively young engineers answered:

"As one of the three major exhibition groups, China Aviation Industry has been invited to participate in the Singapore Asia Airshow next week, so a large delegation has been sent there, and we are all accompanying technicians."

"As for Mr. Yan...he definitely can't go abroad casually, and the progress of the aeroderivative gas turbine for power generation is still a bit tight, so he needs to stay and be responsible."

After all, it was a large backpack that was half the height of a person on the entire shoulder.

Judging from the shape, it should be empty.

This is not surprising.

This kind of official business trip abroad will definitely require the purchase of some foreign products.

Not driving the transport plane directly to purchase goods is already a great honor to the customs.

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

"I have been conducting tests in 624 Shangougou during this period, and I have never heard of it."

Chang Haonan was a little ashamed that he knew nothing about such big news:

"But... what does this main exhibition group refer to?"

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

"However, the United States, France and us are exceptions. Each is allocated one-fifth of the total area."

"So this means...QC130 gas turbine will also be exhibited at the exhibition?"

Chang Haonan was quite excited when he heard the news.

The Singapore Asia Air Show is a relatively successful one among the emerging air shows in the post-Cold War period.

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

However, for China Aviation Industry, which has just begun to enter the world, this stage is not too small.

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

And at least in the short term, they will also be China's main target customers for arms sales.

"This was originally the plan."

Another shorter lesbian said with a somewhat regretful expression:

"However, QC130 produced a total of two prototypes, and they were all sent to the 708 Institute for technical verification. We really couldn't bring the prototypes to the exhibition, and in the end they turned into 1:1 plastic models..."

"This time we mainly worked with representatives from the 410 factory to provide technical support for the J-7F and FTC2000 at the exhibition, which is Guihang's JJ-9."

Chang Haonan understood immediately.

Both aircraft use 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 more technical strength with you just in case.

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

Naturally, it is impossible for him to forget the first model that he actually participated in the research and development after his rebirth.

"No, I guess Shengfei has also given up on that export model. It's almost the 21st century, and I'm afraid not many countries still need an interceptor, even a multi-purpose interceptor."

That makes sense.

Moreover, even if an interceptor is needed, the MiG-25 in Russia is almost sold at scrap price, and the price-performance ratio is really incredible.

Chang Haonan originally wanted to ask about the exhibitors this time.

As a result, before he could ask the question, someone with great interest gave the answer in advance:

"As far as I know, our main products this time should be the MA-60 passenger aircraft that will soon complete the certification process and start delivery, and the export model of the JH-7, FBC1."

"Also, it is displayed in the name of a jointly developed model, but in fact it is the original Tupolev C808/Tu334."

Chang Haonan has naturally been paying attention to the situation in Figure 334.

After the two parties signed the contract, Tupolev's actions were swift. However, Hufei had never had access to Russian technical information before. In addition, although the Tu334 was a regional airliner, it was designed and generated according to the standards of a mainline airliner. Therefore, the speed of digestion and absorption is definitely not as fast as that of Project .

Now it happens that Russia is not the main exhibition group, so the exhibition area is not enough.

Painting Picture 334 with the national flags of the two countries and putting it on display in China would be a win-win situation.

"Apart from these three, there may not be much left. The two fighter jets I just mentioned, the helicopters imported from France by Bingcheng, the Chujiao 6 and Qiang 5 produced by Hongdu... "

The other party counted on his fingers:

"There are not many types, but I heard that the United States will bring the latest F18F carrier-based aircraft that has just made its first flight this time, and France will also display the prototype of the Rafale. In comparison, it seems that our battle is not enough... …”

At this point, everyone felt a little disappointed.

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

Although they all play some tricks, generally speaking, everyone still knows who will win and who will lose.

"The two latest third-generation fighter jets..."

Of course, Chang Haonan could not reveal his development plans for the two main models of J-10 and J-11. He could only encourage him with a firm tone:

"The J-10 was already tested last year. I estimate that our own third-generation aircraft will be officially unveiled in the past few years!"