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Chapter 307 Jet Engine Selection: Centrifugal and Axial (Part 2)

Jet engines were divided into two different branches during World War II, namely centrifugal jet engines and axial flow jet engines.

The so-called centrifugal type uses a special centrifugal compressor to compress the airflow entering the engine and throw it to the surrounding combustion chambers. It is heated by ignition to form high-temperature gas, thereby forming a driving force for doing work.

force.

In an axial flow jet engine, the airflow naturally flows into the engine along a fixed axial direction, and then uses a high-speed rotating compressor to pressurize the inflowing air, inject it into the combustion chamber for ignition and heating, and finally form a high-temperature jet heat flow to complete the engine.

of normal operation.

If we use an inappropriate thing to describe the two types of jet engines, then the centrifugal engine is like a blower, which not only provides airflow, but also pressurizes itself; as for the axial flow engine, it is more like an exhaust fan.

It continuously absorbs airflow and pressurizes and heats it along the fixed channel...

If these two different types of jet engines are placed in a few decades, there will probably not even be the least controversy, because the unique structures of the two have already destined that the axial flow type has greater applications than the centrifugal type.

The potential is due to the fact that the new high thrust-to-weight ratio turbofan engines developed by major military powers all adopt axial flow structures.

But the problem is that it is early 1951, a time when jet fighters have just started, and the two engines are indistinguishable. The most typical example is that on the Korean battlefield today, the MiG-15 equipped with a centrifugal engine is installed on the same shaft.

From the peak showdown between the flow-engine F-86, it can be seen that there is no essential difference between the two different styles of jet engines.

Because of this, the debate about centrifugal and axial flow has continued from the Second World War to the present, but the protagonist has changed from the secret competition between Britain and Germany to the current competition between the Soviet Union and the United States.

Just like when fighter jets changed to swept-wing technology a few decades later, it was a matter of choice and trade-off, and it was a very tortuous road.

Artyom Mikoyan is walking on this road. From repeatedly hitting the wall and being unknown during World War II, to now becoming famous and becoming a leader in the Soviet fighter research and development field, Artyom Mikoyan has a good brother to help him.

, also because he has mastered a "quick" tactic.

If he hadn't worked overnight to get ahead of the Lavochkin Design Bureau and take the lead in test-flying the MiG-9 fighter jet, he wouldn't have been the first to win the Soviet jet fighter. Then he would continue to work hard and use the same method to complete the MiG-9 first.

The design work of the -15 caused Lavochkin's new jet fighter with similar performance to be defeated again.

At this point, the sudden rise of the MiG completely drove Lavochkin out of the field of fighter design and became the new overlord of the Soviet Union in fighter development. However, the MiG's dominance was not very stable. There was no way, there were too many aviation talents in the Soviet Union.

In addition to Lavochkin, there are also Yakovlev, Sukhoi, Ilyushin, Tupolev, Myashev...

These are countless famous people. As for the unknown geniuses, there are even more unknown geniuses. It can be said that the competition in the entire Soviet aviation field is very fierce. If you are not careful, you will be completely knocked down like Lavochkin.

, Based on this, Artyom Mikoyan, in addition to holding on to his brother, is using the advantages he currently has to continuously launch new models.

From the initial MiG-9 to the MiG-15 that fought fiercely in North Korea; from the MiG-17 that is undergoing test flights to the current i-360 program that is being developed rapidly, Artyom Mikoyan and his MiG design bureau only use

For 8 years, that is to say, the MiG Design Bureau will launch a latest jet fighter every two years.

This speed of innovation is comparable to the ultra-fast mobile phone industry of later generations. This shows how far MiG Design Bureau has used the word "fast".

Of course, there are opportunities for great development and renewal in the aviation field; there are also factors of desperate competition with the hostile Western world; but it is undeniable that Artyom Mikoyan must have his unique method, otherwise he would not have

He stood out from so many outstanding pilots.

And this unique method is not unique. It uses a large number of mature technologies, especially in the most time-consuming aeroengine. It uses centrifugal jet engines improved from the British "Nion" aeroengine from beginning to end. The reason for this is that it is indisputable.

Just because this type of engine has low technical difficulty, simple and easy-to-understand structure, convenient and fast production, strong and durable overall performance, stable and efficient operation, it is simply a magic machine tailor-made for rapid production.

Because of this, when MiG started working on the i-360 project, the centrifugal jet engine that Artem Mikoyan could quickly produce without even thinking about it was designated as the power source of the new fighter. If one engine had insufficient thrust, it would be directly

Above two, in short, it is necessary to complete the mission of the new fighter aircraft as quickly as possible.

As a result, when his request was sent to the Klimov Design Bureau, which had always been supported by him, he was opposed by the chief designer of aeroengines, Klimov, on the grounds that according to his calculations, the axial flow engine would be faster than the centrifugal engine.

Send something more suitable for the new fighter jets of the future.

For this reason, Klimov tried his best to exaggerate the benefits of axial flow engines. Although Artyom Mikoyan was unhappy, he was not an aero-engine expert, so he did not

If you persist, you will just tacitly agree that Klimov is working on his axial flow engine.

It was not until today that he was invited by his brother to join the new technology evaluation expert group and saw the two photocopies of "A Brief Introduction to Jet Engines" that Artyom Mikoyan discovered that he had been tricked by Klimov.

He immediately became furious and pulled Klimov directly and asked him to explain.

How could Klimov have imagined that Germany, which insisted on axial-flow jet engines, changed its mind and turned to centrifugal engines? Especially the sentence in the photo, it even offended the Soviet Union.

The itch of most military industry experts and senior executives:

"Because of its simplicity, centrifugal jet engines are more suitable for large-scale wars. If Germany had realized this idea in 1943, it might not have focused on the extremely complex axial flow engines, and the war would not have been lost.

So tragic..."

If other people say this, that's it. The problem is that the author of this book is Alfred Luke, the actual person in charge of German labor production during World War II and the real leader of the "Doomsday Plan", so

The weight of this sentence is simply indescribable, because it not only summarizes the reasons for Germany's defeat, but also confirms the correctness of the Soviet military industry development thinking from one side.

Klimov doubted the authenticity of this monograph, but in the face of Artyom Mikoyan's aggressive eyes, he still gave up his basic conscience and chose to surrender to power, so he nodded heavily: "Don't worry, my dear Comrade Mikoyan, when I get back I will adjust the work of the design bureau and put the improvement of centrifugal jet engines first!"

"Well, hurry up!"
Chapter completed!
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