Bright Sword starts with the grenade flat.

Chapter 179 Jet Fighter Afterburner

However, this three times the speed of sound is only temporary and is achieved at the expense of endurance and fuel efficiency. Therefore, since the MiG-25, the fourth-generation and fifth-generation aircraft have controlled their top speed to more than twice the speed of sound and less than three times the speed of sound. For example, the F-22 fighter jet.

But the detonation engine Liu Qin is currently researching can allow the aircraft to easily break through to ten times the speed of sound or even higher.

Because the combustion principles of turbojet engines and detonation engines are different, this determines the qualitative gap between them.

However, although Liu Qin's detonation engine is good in theory, it has not been researched yet!
But if we haven't researched it, then everything is in vain, not to mention that the aid war will start next year!

So Liu Xiu took advantage of Liu Qin to drink water and said to Liu Qin:

"Dad, the performance gap between our current wooden fighters and foreign fighters is quite big! I read in the newspaper a few days ago that the speed of Soviet and American jet fighters can reach 900 to 1,000 kilometers per hour, and Our wooden fighter plane can't even reach a speed of 700 kilometers. Doesn't it need to be improved?"

However, Liu Xiu's father sighed after hearing Liu Xiu's words:
"Xiu, don't you think I don't want to! But look at our current industrial base. It's hard to make a metal fuselage, let alone a jet engine. Although I haven't done much research on jet engines, I heard that It has tens of thousands of revolutions and must withstand temperatures of thousands of degrees! This requires very high materials for both the bearings and the engine!”

When Liu Xiu heard this, he understood that it was true, but there would be a war with the United States next year, and the MiG-15 supported by Big Brother and the American Saber fighter were actually about the same thing.

Of course, there is no absolute overwhelming advantage. After all, the top speed of the MiG-15 is only more than 100 kilometers per hour than the Sabre.

Therefore, Liu Xiu's idea is to let his cheap father know more about the turbojet engine, and improve it after the MiG-15 fighter arrives.

The workmanship fan blades are driven by the high-temperature and high-pressure airflow, and then transfer the force to the compressor blades in front, so that the compressor blades can compress the air in front, and so on.

You must know that the reason why the MiG-15 and Saber cannot break through supersonic speeds is that apart from the appearance of the aircraft, the most important thing is the equipped turbojet engine.

Of course, Liu Xiu didn't expect his father to make major changes. Liu Xiu's improvement plan for first-generation fighters like the MiG-15 was also very simple, which was to add an afterburner to the fighter engine.

Afterburning is to inject a large amount of fuel into the distance between the high-temperature and high-pressure gas of the turbojet engine from the power blade to the tail nozzle, continuing to increase the temperature of the gas to generate greater thrust.

Then the compressed fan is mixed with fuel to form a fuel mixture, and then ignited to form high-temperature and high-pressure gas to drive the subsequent working fan.

The high-temperature and high-pressure gas drives the workmanship blades and then continues to spray toward the tail nozzle at high pressure, so that the reaction force generated by the jet can be used to drive the aircraft to fly.

And this afterburner is actually very simple. You must know that the fan blade structure in the turbojet engine is divided into two types. One is the compressor blade in the front, which compresses the air from the air inlet to the back.

You must know that the biggest difference between the engine of the first generation aircraft and the subsequent generations of aircraft is that it is not equipped with afterburner.

In the era of machine guns and machine guns, if you want to form an advantage, you must have a speed difference of at least two hundred to three hundred or more.

This method of directly injecting fuel to increase thrust is called afterburner on a fighter jet.

For example, after the end of the war to aid Korea, the United States immediately developed the F4 fighter jet, whose maximum speed directly reached two and three times the speed of sound.

At such a speed, the MiG-15 fighter plane without the afterburner function could only be passively beaten when it encountered it. It could not even see the tail flames if it wanted to pursue it. And this fighter is the absolute suppression of the second-generation fighter with the afterburner function against the first-generation fighter without the afterburner function.

Of course, being powerful has its disadvantages, and nothing is perfect. Turning on afterburner is usually a way for the aircraft to pursue short-term thrust and open the afterburner, so that the aircraft can instantly gain a higher speed.

Although afterburner thrust will be greatly improved, the fuel consumption will be extremely high, which is dozens or even hundreds of times higher than normal flight.

Generally, fighter jets can achieve a power increase of 40% to 70% or even higher after turning on afterburner. Of course, this comes at the expense of aircraft range and engine life.

After all, turning on afterburner will definitely increase the temperature of the tail nozzle, and even melt the tail nozzle directly over time. However, turning on afterburner will increase fuel consumption and shorten the life of the fighter engine, which is nothing compared to the fact that the fighter is shot down.

Generally, the fuel consumption of a fighter aircraft with afterburner turned on is calculated in seconds. The afterburner fuel consumption value of most fighters is above two.

That is to say, the fuel consumption per hour for every kilogram of thrust produced by the engine is more than two kilograms.

However, the thrust of an aircraft engine is often more than ten tons, and this value will be dozens of tons of fuel consumption per hour!

Taking the first fifth-generation aircraft as an example, this aircraft can fly for more than four hours with a normal internal fuel load, and its total range is approximately 2,900 kilometers.

Flying at normal subsonic speed, the fuel consumption per hour is only about 1.2 tons. If the engine is turned on with afterburner, the fuel consumption rate will reach more than 900 kilograms per minute.

Therefore, its fuel consumption with afterburner turned on is more than forty times that without afterburner. Judging from the fuel carrying capacity of most current fighter aircraft, almost no aircraft can fly with afterburner for more than ten minutes.

This does not take into account the remaining fuel required for return. If the fuel consumed during takeoff and return is taken into account, it only takes a few minutes for an aircraft to use afterburner to completely consume its own fuel.

But this is nothing compared to the safety of the fighter plane itself. As long as it can win or escape safely, it doesn't matter if it consumes a little fuel.

After all, how much does a fighter plane cost, and how much is one or two tons of fuel worth?

So Liu Xiu's current idea is to let Liu Qin study the nest-jet engine, and then when Liu Xiu tells Liu Qin the idea of ​​adding afterburner to the engine, Liu Qin can quickly turn Liu Xiu's idea into reality.

After all, although Liu Xiu knew the principle of fighter afterburner, Liu Qin had to think and solve the specific problems such as how to install the afterburner injector pipe, how much fuel to spray, etc.

So Liu Xiu immediately said:

"Dad, you don't have to worry about me reacting to the higher-ups and asking the higher-ups to buy a few MiG-15 fighters from the Soviet Union for research! So you still have to stop your detonation engine and study it first. Give it a try! Maybe studying jet engines will bring you some inspiration for your detonation engine!"

But what Liu Qin said next made Liu Xiu unexpected. Liu Qin looked at Liu Xiu and said:
"Xiu'er! The overall situation is now certain. World War II has ended several years ago, and a large-scale war will not happen for a while. I think even wooden airplanes are enough! When our industrial strength increases, It’s not too late to slowly study jet fighters!”

(End of this chapter)