Invincible Smart-Guy System

In his heart, Hollande felt like a fool who took the initiative to find someone else to show a bad foreign language. He thought he had learned one or two foreign languages very well. As a result, when someone suddenly said a lot of words, he showed his clumsiness. He couldn't deal with it any more. If he dealt with it any more, he could only chat with others in French. Then, Hollande quickly praised: "Mr. Zhang speaks French It's very good! "

Zhang Yunfeng smiled and continued to say in French: "thank you for your praise. French is a profound and wonderful language. I think I need to do more."

Hollande praised Zhang Yunfeng for his intention to turn the page, but he didn't expect Zhang Yunfeng to start again. He immediately felt that his head was huge, and he knew that Zhang Yidao was really not difficult to deal with. He must have known the real purpose of his trip, so Caisi didn't dare to lead his feelings. If you treat him politely, he would treat you politely a hundred times. If you go on like this, you can buy and sell But it's hard to talk about!

In the next welcome ceremony, Hollande was thinking about what way to cover Zhang Yunfeng step by step in front of the Chinese and French media. Only in what language and way can Zhang Yunfeng directly dig out a pit that is not deep enough for him to fall in and never climb out. After thinking about it, Hollande had a rough idea in mind 。

After the welcome ceremony, Zhang Yunfeng, as a tour guide, led a group of people into the production line of Dongchen hanggong for investigation. First, he visited the production line owned by Dongchen hanggong, and then he visited the imported production line just put into production. All the production lines, highly automated production made Hollande Marvel, and praised Dongchen's high-tech strength. Zhang Yunfeng also compliments some French enterprises with flattery, such as Alstom's outstanding strength in the field of rail transit.

The media of the two countries also found out the mystery of the dialogue between Zhang Yunfeng and Hollande. However, whenever Hollande speaks and praises Dongchen, Zhang Yunfeng will immediately find a French enterprise to counter boast and go back. There will never be a situation of accepting Hollande's praise. The two sides spent half an hour courteous exchanges, which blocked Hollande's mind. He thought, not yet It's the most mature time to wait patiently.

After visiting several engine production lines of Dongchen, Hollande couldn't help asking Zhang Yunfeng in front of the media: "Mr. Zhang, I heard that Dongchen has started to produce the aircraft engine of medium and large reasoning, and has already entered the ground test stage, right?"

Zhang Yunfeng nodded and said, "that's right, your Excellency President. Now some new engines are in the ground test phase."

Mr. Zhang, I wonder if we have the honor to visit the laboratory

Zhang Yunfeng knew that he couldn't hide. He promised to come down and said, "of course, please follow me."

The performance parameters of the engine designed and produced by the sophomore have been finalized in the design stage, and the production line will not have any deviation in the actual test. However, due to the necessary form, many engines are being tested in the laboratory, including a series of experiments such as continuous running time, thrust and fuel consumption, mechanical stability, simulated bird strike, etc In order to save time, it's generally the same model of multiple engines that conduct different experiments in different laboratories. Zhang Yunfeng and his team first visited the continuous operation experiment. At this time, the continuous operation time of the three engines in the laboratory is all publicized on the display board of Shuo Da, which shows that the three engines have been running for 68 hours.

"Your Excellency President, this experiment is a totally closed unmanned experiment. The environment inside is very bad. It needs to simulate the environment of the engine running in the high altitude, including temperature, air pressure and air flow. So we can only visit it outside."

Hollande nodded and exclaimed, "after more than 60 hours of continuous operation, Dongchen's engine tolerance is indeed very strong!"

Zhang Yunfeng said with a smile: "you are flattered, and we are only aiming to provide better products for the global civil aviation users."

With a smile, Hollande said thoughtfully, "Dongchen's sense of responsibility is a model worthy of learning from enterprises all over the world."

Zhang Yunfeng said in his heart that how could this guy talk like a porcelain man? But he still had to deal with his words. Hollande looked through the glass for a while. In such a large closed laboratory, there was no other thing except three engines running at full capacity. He was not interested in it, so he said: "Mr. Zhang, let's go to the next Laboratory "

Zhang Yunfeng promised to take them to the simulation bird strike laboratory. In this laboratory, he mainly tests the damage caused by the engine sucking in the birds when the aircraft is in the low altitude state of take-off and landing. The birds are always the biggest threat during the take-off and landing process. Small birds do not matter. However, once encountering large and medium birds, the birds and the aircraft are In that case, it is impossible to dodge at all. The powerful suction of the aircraft engine is that people can also absorb it. Moreover, once large and medium-sized birds or even most large and medium-sized birds are inhaled into the engine, it will not only cause damage to the structure of the engine itself, but also cause the engine to shut down in the air at any time.

The most famous incident of bird strike was Flight 1549 of American Airlines in 2009. An A320 plane was hit by a dense flock of birds just over a minute after taking off. As soon as the plane took off, both engines stopped working, and finally relied on captain Chesley. Salenberg's excellent driving skills made the plane landing successfully on the Hudson River without power.

It can also be seen from this that the importance of the anti bird strike performance of the engine, while the whole series of engines of Dongchen adopt the advanced technology and special materials of Dongchen's own, and the anti bird strike ability is much better than that of the general engine. Because of the arrival of Hollande, Zhang Yunfeng arranged the technicians to conduct a complete bird strike experiment again.

Dongchen's bird strike laboratory is a 40 meter long semi closed room. The engine is fixed at 30 meters. At the end of the room is a special air outlet. At the other end of the room directly facing the engine, there is a set of air pressure transmitter. This air pressure transmitter can let objects shoot out frozen birds and poultry for experiment according to different pressures towards the engine, simulating different The condition in which birds of size and weight collide with aircraft at different relative speeds.

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Dongchen's standard for simulating the encounter of birds is that six frozen white geese with their stomachs full of food and a total weight of 7kg are accelerated to a speed of 500km, which continuously impacts the engine within three seconds. Under such a high-intensity impact, almost no engine can escape. Parking is a small thing, and internal explosion and combustion are a big thing, but Dongchen's engine can In order to easily withstand this intensive and strong impact, it will only cause slight damage to the turbofan.

Hollande was surprised by the test standard of Dongchen. He blurted out, "can Dongchen's engine really withstand such a dense impact?"

Zhang Yunfeng nodded, pointed to the large screen on the test console, and said: "it shows the state, speed and actual thrust of the engine in real time. In our standard, after such a high-density impact, the actual thrust of the engine can not be reduced by more than 20%. In other words, even if both engines suffer such impact, the engine can still provide The aircraft has enough power to keep it flying. "

Said Zhang Yunfeng: "I don't know if you know the working state of the aircraft engine. Most of the aircraft engines are prepared for take-off. During the take-off process, the engine power is fully turned on. Once the aircraft leaves the ground, the aircraft has enough lifting power. Except that the fighter occasionally uses the full power climbing mode After taking off, all the civil aviation aircrafts climb with the throttle down, and the throttle is smaller when they arrive at the fixed altitude for cruise. Therefore, once the aircraft takes off, the engine thrust of the aircraft has a large surplus. Even if there is a loss of 30% after bird collision, the engine power can ensure that the aircraft can climb to a sufficient height, cruise and finally land. Therefore, Dongchen's aircraft is adopted , even if it hits a bird, it doesn't need to make an alternate landing. It can continue to complete the rest of the voyage. "

"If so, I'm afraid that the unified standards of civil aviation will be changed because of Dongchen engine," said Hollande! Now the requirement of international civil aviation is to make an emergency alternate landing after a bird strike, right? "

Zhang Yunfeng said with a smile: "I didn't expect that the president did his homework. Yes, although the civil aviation standard is so formulated, the civil aviation standard will naturally change after the progress of science and technology. If Dongchen's engine has achieved a large number of coverage, then we will ask the CAAC to modify the relevant standards."

Said Zhang Yunfeng: "let's have a look at the experiment on the spot. I think you should have a clearer understanding after seeing the whole experiment."

Hollande quickly nodded, and the experimenter began to fill the six air pressure tubes of the air pressure transmitter with the frozen white geese for the test. The engine was also started, and soon reached the full power operation state. After the air pressure transmitter died, it also had enough air pressure. With the experimenter pressing the launch button, the six air pressure tubes had an interval of 0.5 seconds and 500 meters each It took only 2.5 seconds before and after firing six white geese at an engine 30 meters away.

The engine makes a continuous loud noise, but because of its huge volume and high leaf density, it's like a super meat grinder. Any animal will be ground into meat mud by the high-speed rotating vortex fan in the shortest time when it is inhaled. Therefore, the visual effect of this impact is very short. After the loud noise, six white geese are lost, but the engine fan can be seen vaguely The color of the leaves turned scarlet.

at this time, the power of the engine on the display is only reduced by 15%, which is less than 85% of the maximum power for any aircraft that has taken off from the ground or is ready to land after receiving the fuel. Therefore, this standard is absolutely safe, which means that even if the aircraft is hit by such a bird strike, the whole aircraft can be easily completed For flights, only the damaged blades need to be replaced after landing.

Hollande was stunned and realized that there was no Airbus