Chapter 300 (2/2)

The remaining two options are to choose between turbojet engine and small bypass ratio turbofan engine.

However, both turbojet engine and small bypass ratio turbofan engine can be used as the power of supersonic aircraft, but there are obvious differences between them.

Although the turbojet engine has many advantages, and even if the speed of the aircraft reaches Mach 2 or even Mach 3, the turbojet engine can still provide power for the aircraft, the turbojet engine also has obvious defects, that is, the fuel consumption is much higher than that of the turbofan engine. In addition, in many other aspects, Nor can it be compared with a turbofan engine.

The small bypass ratio turbofan engine is different. Although the specific impulse of the small bypass ratio turbofan engine is lower than that of the turbojet engine, which makes the engine fan produce great wind resistance after the aircraft reaches a certain speed, that is, more than twice the speed of sound, and the probability of the engine will decrease significantly, but in the fuel consumption and noise of the engine, The thrust of the engine is better than that of the turbojet engine.

However, in contrast, in fact, whether Wang Bin or Professor Dai, they are actually more inclined to small culvert than turbofan engine. After all, giants such as Phoenix have already considered all aspects of factors, including the wind resistance generated by the aircraft in flight, even in the design.

However, if you want to make its speed more than twice the speed of sound, it's a fool's dream. And because the thrust of the turbojet engine is less than that of the turbofan engine, if you use the turbojet engine as the power of the Phoenix aircraft, you must use more engines for a long time.

At the same time, the fuel consumption of turbojet engine is much larger than that of turbofan, which means that the aircraft must carry more fuel if it wants to fly farther, which will greatly reduce the load capacity of the aircraft.

However, Wang Bin, Professor Dai and others did not completely give up using turbojet engine as power, because using turbojet engine as power has many defects, but using turbojet engine as power is not impossible when the aircraft has sufficient strength and wants to exceed Mach 2 at high altitude.

Even if it reaches the double three standard or above, it is not impossible. If the speed and altitude of Phoenix can reach the double three standard or above, it will definitely be of great help to the aerospace industry of Tiangong technology, and even lay the foundation for changing Phoenix into an aerospace plane in the future.

Of course, with the current capability of Tiangong technology, it is basically impossible for Phoenix to use turbojet engine as power and break the double three standard, and turbojet engine with thrust of more than 20 tons is not so easy to develop.

Therefore, in the current situation, Wang Bin and his team are still honest in using the small culvert, which is more suitable than the turbofan engine. They can build the Phoenix aircraft first.

After all, if you can't build the Phoenix, even if the engine is more advanced, it won't work at all.