The sniper starts from the bright sword escape period

Chapter 387 Kunpeng

Therefore, the afterburner of this turbofan engine made by Master Luban is only [-] times the normal flight consumption, which is very good.

As for the principle of turbofan engine afterburner is also very simple, because there is quite a lot of oxygen left in the burned gas discharged from the combustion chamber, which can be introduced into the afterburner behind the turbine to inject fuel again Combustion to increase the exhaust temperature and increase the exhaust velocity.When reburning afterburning, the throat area of ​​the nozzle must be enlarged accordingly to ensure that the gas after afterburning flows out of the engine smoothly without affecting the working status of the turbine and compressor.The afterburner of a fighter is a means to obtain a sharp increase in thrust in a short period of time at the cost of consuming a large amount of fuel and reducing fuel efficiency.

The fighter jets in the world before Bailixiu traveled through afterburner can get 40.00% to 70.00% extra thrust. After all, each turbofan engine has a different model, so the specific data is naturally different. Besides, afterburner It can also be half-opened, fully opened, or only opened a little bit.

As for why the turbofan engine of the fighter is equipped with an afterburner, after all, the working time of the afterburner of the fighter is so short, why is it necessary to design the afterburner for the fighter jet?

What is the purpose of the afterburner of the fighter?The Foxbat fighter, which once turned on the afterburner to make the aircraft reach Mach 3.2, directly relied on the brute force of the fighter to throw off the missile.That is, faster than the missiles attacking him.

However, as the speed of air-to-air missiles becomes faster, it is more difficult to use the afterburner to throw off the air-to-air missiles. Of course, the afterburner of the current fighters is not to throw off the missiles. The speed of the air-to-air and surface-to-air missiles has greatly increased. Can't get rid of it even with afterburner.

There are several uses for a fighter afterburner.The first one is that at field airports that are not suitable for long distances, short-distance take-offs can be accomplished with short afterburners.

Or on the deck of the ski-jump carrier, you can rely on the afterburner of the aircraft to allow the aircraft to take off in a very short period of time with the extra thrust.

Due to the considerable fuel consumption of the engine at this time, the afterburner was only used for short runway takeoffs or combat, and the time was limited to a few minutes.At this time, the tail nozzle is accompanied by visible flames, and the visual effect is very obvious.

With full fuel and full ammunition, the afterburner needs to be turned on for takeoff.Short takeoff is an application where afterburner is important.

There is another application, that is when the aircraft is fighting at close range.In pursuit of higher mobility.Fighters need to turn on afterburner when they are fighting.The engine is the source of power output of the aircraft.Many aircraft fighting actions require high thrust to satisfy.In other words, the application of afterburner to fighter jets is more common.

The principle of opening the afterburner is that there is still a considerable amount of oxygen in the burned gas discharged from the combustion chamber, which can be introduced into the afterburner behind the turbine for refueling for supplementary combustion to increase the temperature of the exhaust gas. increase the exhaust velocity.When reburning afterburning, the throat area of ​​the nozzle must be enlarged accordingly to ensure that the gas after afterburning flows out of the engine smoothly without affecting the working status of the turbine and compressor.

This kind of operation also brings certain disadvantages, that is, the life of the engine is extremely reduced.Even if the afterburner is turned on for a long time, the aircraft engine will be scrapped directly.Therefore, aero engines with afterburners are only equipped on fighter jets, and civil aviation airliners do not use them at all, and civil aviation aeroengines do not have afterburner configurations.Mainly it is not economical.Besides, civil aviation airliners do not need to consider the short-distance take-off and how violent the aircraft does, as long as they fly smoothly.

However, compared to most civil aviation airliners that can only fly at subsonic speeds, there is a supersonic airliner Concorde that can cruise at twice the speed of sound. combustion chamber.

It's just that this kind of supersonic airliner, which is more than twice the speed of ordinary airliners, was no longer in use in [-].

Because although its speed can double the original flight time, the high flight cost cannot make people accept the remaining few hours.

In addition to the maintenance costs of passenger aircraft, the most important cost of flying passenger aircraft is naturally the cost of fuel.

协和式客机的燃油消耗让运营成本居高不下，它每飞行1小时就要消耗4670加仑约17677升航空煤油，而波音最大型的波音747-400每小时消耗2340加仑航空煤油。

In terms of fuel alone, although the fuel consumption of the Concorde is twice that of the Boeing 747, don’t forget that the flight speed of the Concorde is twice that of the Boeing 747, so the fuel consumption of the two is actually similar in terms of flight distance. .

But most importantly, the Boeing 747 can carry about [-] passengers, four times the [-] passengers of the Concorde.

Naturally, such a high consumption of fuel costs must be included in the air ticket, and the air ticket must be more than four times more expensive to make the airline profitable.

But is it really worthwhile to let passengers pay four times more for twice as fast?
This is like taking a taxi to go to a place 200 kilometers away to do business. It takes two hours to take an ordinary road at a speed of [-] kilometers but only costs [-] yuan.

But if you go at a high speed at a speed of 800 kilometers, it only takes one hour, but it costs four times more, which is [-] yuan.

So you will spend an extra 600 yuan to save this hour!
What's more, the price of air tickets is more expensive than taking a taxi. It is equivalent to spending 1000 yuan for an ordinary air ticket, but it costs 4000 yuan for the first air ticket for a Concorde plane.

It is precisely because of this that the amphibious RV that Master Lu Ban gave to Bailixiu will choose subsonic speed instead of supersonic speed for long-distance flight.

At this time, in the cab of the amphibious caravan, Zhong Wuyan looked at Bai Lixiu and asked:

"By the way! You haven't given your three-dwelling RV a name yet? Have you figured out what to call it?"

Bai Lixiu was taken aback when he heard Zhong Wuyan's words, and had to name the three-dwelling RV.

But Bailixiu has no talent for naming such things, but after thinking about it for a while, Bailixiu didn't plan to build such a big RV. You must know that Bailixiu's amphibious car can fly in the sky. The RV that can run on the ground and swim in the water has a length of 84 meters, and the width of the fuselage is 12 meters without the wings.

The fuselage width of An-225 is wider than that of the An-[-]. From a distance, it looks like a flying wild duck. After all, the belly of a duck is also very big, but the name of a duck is a bit unpleasant, so Bailixiu immediately just said:
"I think it's called Kunpeng!"

Zhong Wuyan, Ake and the others heard what Bailixiu said and naturally did not intend to refute. After all, they all helped in the construction of the Kunpeng, but Bailixiu was the only one who contributed.

(End of this chapter)