Chapter 1368

No wonder this army leader has such an attitude.

You should know that the speed of Mach 1.8 is not only the engine relative to the air, but also the air relative to the engine is Mach 1.8, which is the pure speed of Mach 1.8. To this extent, the gentle air is a sharp knife, not only sharp, but also with high friction heat.

That's all. The key is at an altitude of 15000 meters.

It is necessary to know that it takes a lot of effort to start an aeroengine on the plateau in the snow area. The reason for this is that the altitude of the plateau in the snow area is too high and the oxygen content in the air is too low to make the aviation fuel in the aeroengine fully burn.

In the snow area with an average altitude of 4000 meters, the plateau is full of urine, let alone 15000 meters, which is more than three times the average altitude of the snow area plateau. However, the oxygen content does not decrease three times correspondingly, but decreases several times exponentially.

In this case, it is difficult for the aero-engine which needs a lot of oxygen to obtain sufficient combustion catalyst, so it is not necessary to restart.

Today, the combination of supersonic speed and high altitude environment is equivalent to a unique move. The damage is not only doubled, but also more than 10000 times.

This is the reason why most of the second and third generation aircraft in the world choose to descend the height when the engine stops at high altitude.

Because only by lowering the altitude, getting enough oxygen and reducing the speed, can the air speed be reduced, so as to ensure that the engine can be restarted in a stable environment. Otherwise, you can either jump quickly or die together with the aircraft.

At this moment, the wd-64vip aeroengine in the No.1 cabin is going to challenge what is called the forbidden zone in the domestic aviation industry. Even if it is not to fly in the sky on a real plane, the head of the army is still sweating for the engine in the No.1 high altitude simulation experiment cabin.

Not only the chief of the army, but also other officers and leaders. Even the officers and leaders who did not know the inside door were dignified after listening to the introduction of pedestrians. Their eyes staring at the live LCD screen of cabin 1 were full of unspeakable tension.

"No.1 cabin, speed 1.8 mach, temperature - 50 ℃, air pressure 12 kPa, air flow 742 kgs, everything is normal..."

Just as a group of army commanders and leaders were paying attention to the movements of the high-temperature jet engine on the screen, the young commander quickly reported a set of data on the command desk in the control hall. After a pause, he immediately said without hesitation: "keep the cabin environment unchanged, prepare for the countdown parking... 10, 9, 8... 3, 2, 1 0... Stop! "

When the command was given, the operator in the front row immediately pressed the stop button, and the wd-64vip aeroengine on the screen, which was still roaring and galloping one second before, suddenly went silent.

However, the engine stopped working, but the environment in the No.1 simulation test cabin has not changed at all. There are no less high-speed air flow, low temperature environment and lack of oxygen. Even through the LCD screen, many army leaders and leaders present can feel the situation of the wd-64vip aero engine in the simulation test cabin, and the state is bound to be extremely bad.

But in such an environment, the test console did not immediately issue the start command. The reason is very simple. The countdown display in front of the control hall only counts 52 seconds.

Yes, the high altitude restart test here is not to restart immediately after switching off, but to interval one minute. In the suffocating atmosphere just now, the time just went forward for only eight seconds.

"Xiaozhuang, how sure are you this time?"

Finally, the head of the headquarters was too tense, and asked Zhuang Jianye around him.

Zhuang Jianye shook his head: "it's not easy to say, but this is also the last high altitude restart test of our wd-64vip aeroengine. If it passes this time, it will prove that our variable cycle system has withstood the test. After all, no matter when it is, one minute is enough for pilots to do a lot of things. If it is more than one minute, according to our theoretical calculation, The aircraft will soon enter the spiral speed state. Unless it is a vector engine with high thrust, it will not be able to change at all. At present, the wd-64vip aero engine does not have the ability of multi-directional vector, and the thrust also needs to be improved. Therefore, we are going to do the high altitude restart test for more than 1 minute after the improvement of phase II and phase III of wd-64vip aero engine. "

After listening to Zhuang Jianye's words, the head of the headquarters almost did not pull up Zhuang Jianye's neck and spray a sentence: "do I want to hear this? I asked you how sure you are. You even pretend to be 13. If you don't pretend to be 13, you can die! "

Under the watchful eyes of the people, even make complaints about the evil neither painful nor itching, and even say, "yes!"

The problem is that the head of the headquarters knows what's going on, and Zhuang Jianye, the initiator, has nothing to say, but where are the other people present? I heard that China Tengfei will carry out phase II or even phase III improvement on the basis of wd-64vip aeroengine.

The direction is to increase thrust and install omnidirectional thrust vectoring device. You should know that either of these two items is at the forefront of today's aero-engine.

In particular, the omni-directional vector device is the standard configuration of the next generation of combat aircraft, because the so-called super maneuvering, in addition to the unparalleled aerodynamic shape, the engine vector device also plays an irreplaceable important role. Just because of this, the super maneuvering action that was previously even unthinkable will be easily completed by the aircraft.

When Su-27 was the world leader, the maneuver of Pugachev Cobra was ordinary in front of the aircraft equipped with vector engine.

Because of this, after listening to Zhuang Jianye's words, many people showed a trace of excitement and asked about the schedule for the next phase improvement of wd-64vip aero engine.

Zhuang Jianye responded humbly: "it depends on the progress of our wd-64vip aero-engine prototype. After all, our wd-64vip aero-engine adopts a more advanced variable cycle system, not to mention the leading level in China, even in the world. But because of this, many standards and specifications have no precedent for reference, We can only talk about the next stage after we have explored and accumulated a little bit to get through this difficult road... Ah, ah, look... I'm just saying that the time to start is coming. This experiment is very crucial. If everything is easy to say, and if it fails, we have to make a big change... "

It's too late, but it's too fast. Zhuang Jianye accidentally installed 13, and the time passed. Before Zhuang Jianye finished speaking, the commander in the command seat said in a loud voice: "start up!"

As soon as the voice dropped, the controller pressed the start button, and the wd-64vip aeroengine on the screen, whose outer surface had been covered with frost at minus 50 degrees Celsius, suddenly shook. Then it seemed as if the frozen fan began to rotate slowly, and then it became faster and faster. Finally, with a reluctant roar, the whole engine was like a living beast, Spit out the flame again

Restart successfully!