The Military-industrial Scientific Research System of the Academic Master Chapter 90

Chapter 90 Improved Turbojet 14!

 “Attending the Paris Air Show?”

 Yi Yuanhe raised his head again and looked at Chang Haonan.

 Paris-Le Bourget International Aerospace Exhibition, the largest, most prestigious and oldest international aerospace exhibition in the world.

For Chinese aviation people, the Paris Air Show is not unfamiliar. In fact, as early as the 37th Paris Air Show in 1987, the aviation industry sent a delegation to participate.

However, most of the exhibits are models, and their technical level is relatively backward.

 Generally speaking, the focus is on participation.

“That's right, and it's not just participation. If we can reach cooperation with Italy, even if it's only in name, then we are fully qualified to apply for a real aircraft flight show.”

 After saying this, Chang Haonan noticed a glimmer of light flashing in Yi Yuanhe's eyes.

 Obviously, the other party has been persuaded.

 Therefore, Chang Haonan continued to pursue the victory:

“And, if successful, this will be the first time a domestic aircraft performs a flight performance at a large-scale air show, which will be helpful both for obtaining airworthiness certificates from the European Aviation Safety Agency (EASA) and for entering the European market in the future. ”

 Yi Yuanhe's breathing suddenly became heavier.

As an old engineer, he knew very clearly that Chang Haonan was trying to draw a cake.

 A prototype has just completed its first flight, and he has already planned to seize the European market...

But knowing that he knew it, Yi Yuanhe couldn't help but start to seriously think about the possibility that the other party had just said.

 After all, this cake is so delicious.

Looking at the other party's expression, Chang Haonan knew that he had succeeded.

 From the beginning of the 1990s until the end of the 2008 Olympic Games, a very important, and even the most important, theme of China's foreign exchanges was "showing its own image."

This matter would have felt completely unnecessary in the 2020s before Chang Haonan was reborn, but if we look at the reality at the turn of the century, it is actually very necessary.

 In this context, it is "the first time" for an aircraft designed and manufactured by China to perform a flight demonstration in a core European city like Paris.

 It is definitely an achievement that is enough to put Yi Yuanhe, or at least the M60 project, in the history books.

On the other hand, EASA's airworthiness certificate is even more important.

ˆ Aircraft models that have not obtained airworthiness certificates cannot be registered and operated in the corresponding areas.

However, aircraft manufacturing itself is a highly monopolized and highly protective industry. Whether it is the United States or Europe, they will never let you pass the airworthiness certification casually.

 After all, these standards themselves are part of the monopoly barriers and cannot be easily broken through.

Until Chang Haonan traveled across China, there was only one small aircraft in China, the Y-12F, that had been certified by the FAA.

 As for EASA, there is not even a single approved model.

 This has greatly affected the commercial performance of ARJ21 and C919.

Now, the course of history has been slightly changed because of the existence of Chang Haonan, a butterfly.

 The original MA60 was completely unable to compete with the ATR42.

 In 1996, Europe and the United States generally had a relatively dismissive attitude towards China.

This is not a bad thing to a certain extent, because it is easier to make a fortune quietly and do things that would not be possible in the next twenty years.

For example, through cooperation with Italy, we can open up the joints of EASA airworthiness certification.

 Even further, promote mutual recognition between the upcoming CAAC airworthiness certification standards and EASA standards.

If this matter can be successful, then as long as a model is certified by China, it will automatically be deemed to have passed European certification.

 Almost solves the problem once and for all.

  After all, as the saying goes, first-rate companies make standards, second-rate companies make brands, and third-rate companies make products.

 The same thing is actually happening between countries.

 From Huaxia products, to Huaxia brands to Huaxia standards, it took almost 40 years on the original timeline. Now, Chang Haonan hopes to speed up this process with his help.

Yi Yuanhe, as an old aviation man, can naturally think of these things.

 But the matter is big. Although he is the chief engineer of M60, he cannot decide matters other than the project.

“I need to discuss this matter with Comrade Zhou Yonghang.”

Yi Yuanhe stopped: "However, no matter what the outcome is, Comrade Chang Haonan, I think your suggestions are valuable."

 After finishing speaking, he turned around and walked in the other direction.

 He tried hard to control his expression to avoid showing his joy and eagerness in front of these young juniors.

 But the pace that was much lighter than before still exposed his true thoughts.

 The only two people left walking side by side were Chang Haonan and Liu Hongbo.

 After Yi Yuanhe left, the two of them didn't know what to talk about for a while.

The matter of M60 has just been discussed, but the nature of Project 83 is different, so it is obvious that we cannot talk about it casually.

 In the end, it was Liu Hongbo who took the lead in breaking the silence.

 “Sometimes I feel like you are a monster.”

He looked up at Chang Haonan and shook his head slowly: "When I met Junior Sister Yao at Teacher Du's place the year before last, I thought that was almost the limit. As a result..."

"Is this..." Chang Haonan smiled slightly: "Thousand-mile horses often exist, but Bole does not always exist."

 Liu Hongbo's mood suddenly improved a lot.

“Perhaps I should apply to take an extra course next semester?”

He thought so.

Chang Haonan did not stay in Yanliang for too long. The comrades who inspected the No. 01 prototype moved quickly. The power joint research team flew back to Shengjing again early the next morning, leaving only a few people behind. Take care of some less important follow-up tasks.

Yang Fenghao did not hold another large-scale meeting this time, but gathered several people, including Chang Haonan and Yan Zhongcheng, in a small conference room.

 “Has the problem been identified?”

“Fine.” Yan Zhongcheng nodded:

“When the engine is operating in a large flow path in the transonic speed range, due to the rapid retraction of the throttle lever, the engine's afterburner fuel supply decelerates sharply, resulting in a larger engine drop pressure ratio.”

“The engine severely throttles the high-speed compressed gas at the compressor, and the compressed gas instantly flows up in the form of a shock wave, congesting the inlet flow path and the engine compressor flow path. Abnormal flow separation begins from the secondary high-pressure rotor, and then expands. to the entire compressor, causing the compressor efficiency to decrease rapidly and cause surge.”

“So...is it definitely a design problem?”

“Yes.” Yan Zhongcheng nodded with a serious expression.

 Failure to conduct a complete high-altitude platform test on the ground will eventually bring hidden dangers.

 Now, the hidden danger has turned into an accident.

 A long silence followed.

“I need a serious answer to the next question.” Yang Fenghao glanced at the people in front of him like an arrow:

“Is there still a chance for the turbojet 14 to catch up with the design finalization of the 83rd Project?”

 There was another moment of silence.

“Although we have found the location where the surge occurs, which is the starting point for the next step of design optimization, according to common sense, I am afraid it will take at least about half a year, unless..."

Yan Zhongcheng's voice was a little dry, and then he raised his head and glanced at Chang Haonan next to him:

 “I think Comrade Xiao Chang should be able to provide a lot of help.”

The helmsman's update will be in the afternoon as usual

 (End of this chapter)

Chapter end