Chinese Engine Development

gelgoog

Lieutenant General
Registered Member
How far away is China from developing something like the GE9X for its future large commercial or military transporter planes?
Maybe in the 2030s. Right now they are still working on the CJ-2000. There are naval gas turbine engines of a similar power level to the GE9X though.
 

sunnymaxi

Major
Registered Member
Can it really?
this machine have different names and appearance over the time.. so it is extremely difficult to distinguish between models due to long period of development.. most likely both are the same model.

WS-20 latest improved variant AEP-1300 presented in 2022 Zhuhai air.. pic posted by @Tomboy ..

22 wide chord composite carbon fan blades.
Fg3QosxWYAE5KlZ.jpg


the major reason to go with older clappered fan blades for WS-20 is, it is easy and cheap to mass produce in comparison with wide chord and composite..

WS-20 will produce in large numbers.
 

ReneDad

New Member
That's not what bypass ratio is, that's compression ratio. The bypass ratio is the volume of air channeled around the core divided by the volume channeled into the core. For a fixed core diameter, a higher bypass ratio by necessity entails a larger bypass channel which means a larger engine diameter.
You don't always need large-sized plumbing pipe to get more water flow. It can be achieved by simply building a higher water tower. A jet engine works the same way. You can use a larger single-stage fan to achieve higher bypass ratio, or use 2 or more stages of smaller fan to create higher pressure and speed of air flow inside bypass duct to get the same result. Even if the fan's diameter and stages are same, higher rpm will result higher bypass ratio. GE F-110 engine for instance: The size/diameters of -100, -129 and -132 variants are almost the same, but they have different bypass ratios.

Increasing the speed of air flow of bypass duct will reduce the fuel efficiency and make the engine more noisier. This is why civilian jet engines prefer single-stage fans. But a military engine may use the method if the diameter of the engine matters the most.
 
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sunnymaxi

Major
Registered Member
How far away is China from developing something like the GE9X for its future large commercial or military transporter planes?
you don't need super high thrust GE9X Engines for heavy military transport plane like C-5/AN-124

both C-5/AN-124 have single engine capable to produce 50,000 lbf thrust.

China most powerful Engine CJ-2000 has 78,000-80,000 lbf thrust. which is more than enough for any widebody commercial airliner.

here are some exclusive images of CJ-2000 core machine being assembled.

1.jpg2.jpg
 
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