Take Off My Aviation Era

"Take off my aviation era ( to find the latest chapter!

"Head, don't worry, enough to blow up!" Zhuang Jianye responded in a low voice.

"En~~~" The head of the headquarters nodded and said nothing else, because the aviation experts who were following Abdullah and Mahmoud at the moment had already flocked to the samples of the "Honeycomb Combustion Chamber", one of them A middle-aged expert from Algeria asked the staff of Ascendas Group impatiently: "Can I take it down and have a look?"

The staff did not dare to agree immediately, but looked at Zhuang Jianye. After Zhuang Jianye nodded in agreement, he said, "Yes, sir."

"Thank you!" The middle-aged expert nodded politely, then walked forward, carefully removed the "Honeycomb Combustion Chamber" from the display stand, and put it in his hand to cushion it, his eyes suddenly widened: " This combustion chamber is very light."

"It should be light. The key is how the process holes are distributed inside."

"Yes, the combustion chamber is mainly the cooling structure of the flame tube, and the process hole in the cooling structure is the key."

"Yes, the craft hole is the key, it has nothing to do with the lightness or not."

...

As soon as the middle-aged expert's voice fell, he was ridiculed by other experts for a while. There was no way. If other people were holding metal parts that were much lighter than expected, they would have to be emotional for a while, but all of them were present. Professionals in the aviation field, if the components on the aero engine are made lighter, it should be divided, otherwise how would you let this thing fly into the sky?

So these people simply overcame the boring question of lightness and not lightness, and directly focused on the key, that is, the craft hole on the flame tube of the combustion chamber of the aircraft engine.

As the so-called layman looks at the excitement, the insider only looks at the doorway. As the heated part of the engine, the performance of the combustion chamber of an aero engine is directly related to the overall performance of the engine. In particular, the full combustion of aviation fuel is the key to almost all aviation engines. index.

The problem is that if you want to burn fully, the temperature in the combustion chamber will rise sharply, reaching a high temperature of nearly 2000 degrees Celsius, and ordinary metal parts can't support it at such a high temperature.

How to do?

Then we can only find a good way to efficiently cool the combustion chamber.

Thanks to the inspiration of film cooling on the turbine blades, the engineers wondered whether they could also engrave a film cooling structure in the flame tube of the combustion chamber, that is, **** in the cold air from the outside and form it on the inner wall of the flame tube. A film cooling layer keeps the temperature of the inner wall of the flame tube at a stable value of 1000 to 1200 degrees Celsius, ensuring the normal operation of the whole.

In theory, this kind of film cooling is feasible, but if the film cooling structure on the turbine blades is directly copied to the flame tube, it will be 100% off the street.

It’s not that the method is wrong, but because the entire combustion chamber is also involved in the key process of burning fuel. If the inhaled air impacts the fuel combustion while forming a gas film, affecting the heat flow and temperature, the performance of the engine is not improved but greatly Is attenuated.

Therefore, this gas film cannot impact the burning high temperature flame, and can only be tightly attached to the inner wall of the flame tube, just like a real film completely separates the high temperature flame from the inner wall of the flame tube.

The ideal state is that the cold air rotates clockwise around the inner wall, and the cold air is attached to the inner wall of the flame tube with strong centrifugal force, while the high-temperature flame is fully burned in the middle to push the turbine behind to do work.

The problem is that it is not easy to achieve such an effect. The most important thing is the densely packed craft holes on the flame tube, which may look like a honeycomb to outsiders. The craft holes that make people with intensive phobias get goose bumps when they see it. That way, you can get out of any iron shell.

But in the eyes of true seniors, every hole above is exquisite. At least the position and direction are determined after complicated calculations and experiments. Otherwise, the combination of these holes cannot form a tornado on the inner wall of the flame tube. The same rotating air film.

Of course, the calculation aspect is not the key. The important thing is how to process it. This will test the manufacturing heritage of an enterprise and even a country.

After all, the theory of aeroengine combustion chamber flame tube is very simple, and even the calculation of each hole is not difficult. Even a general aerodynamics undergraduate can easily handle all of this, but once it is implemented by the manufacturer, it can Could it be that a large number of companies are even countries.

Because the processing accuracy and quality requirements of this process hole are very high, the error range cannot be greater than 0.1 microns, which means that the error must be maintained below 100 nanometers.

Yes, you read that the accuracy of this type of process hole can already be calculated in nanometers.

This is also no way, because once the error is too large, it may cause uncoordinated airflow, thereby affecting the overall performance.

So this kind of craft hole is not that the master can make it with years of experience. It must be made with ultra-high-precision equipment~www.readwn.com~ top craft and staggering stability. It can be called a craft hole of artwork.

The difficulty is so great. Only General Motors and Pratt & Whitney can make such craft holes in the world, and these two aviation giants are all American. In other words, only Americans have such production equipment and craftsmanship. ability.

Therefore, GM's GE-90 can let Boeing 777 lead the trend; therefore, Pratt & Whitney's F-119 can give F-22 the advantages of crushing.

Because these two engines use such a process hole, which reduces the overall weight of the combustion chamber, but also allows the fuel to burn more fully, raises the temperature before the turbine, and finally improves the overall thrust of the engine.

The European and Russian manufacturing technology is not good enough. If the honeycomb-shaped process holes cannot be made, the temperature of the combustion chamber can only be lowered, resulting in the failure to increase the thrust.

Although the experts in the UAE and Algeria are not top-notch, they also know the technological development direction of the world's aviation development and the technological dynamics of various countries. Therefore, when you know that the combustion chamber displayed by Ascendas Group is a honeycomb type, I can't wait to see Is the craft hole inside an embroidered pillow?

You know, there are many people who have visited the details of the American-made F-119 aero engine. It's okay to fool outsiders. Fudge them... no way.

So the middle-aged expert holding the combustion chamber was said by the surrounding experts, he was not welcome, he fumbled for a bit, and then moved a few buckles, and then slowly pulled out the flame tube inside, waiting for him When I held the flame tube in my hand and held the glasses to look at the densely packed craft holes on the outside, my head just felt a buzzing~~: "My god, this hole... turned out to be... actually... Wei Precision..."