留底：军用发动机，卡瓦里，GE404,WS10,WS15，-世界游戏论坛-军事论坛-世界论坛网（电脑版）

送交者: 2020年03月06日17:49:16 于 [世界游戏论坛] 发送悄悄话

Kaveri can generate about 70 kN max, Turbine entry temperature: 1300  °C;compare to GE 404 80 kN max, (1,427 °C; 1,700 K),Thrust-to-weight ratio: 7.8,  that is why IAF would not want HAL to use Kaveri for Tejas but chose GE404. IAF wants Kaveri to have about 90 kN max power, after all these years, Kaveri still cannot reach this capability. the reason is, GE404 gene blade is made of so called powerdered super alloy, the maximum high temperature is about 1400-1500 C, or the blade will be melted.  and with this temperature the max power will be about 80 kN, will not go to over 90 kN, up to now, India has not mastered this tech for making powerdered super alloy to make blade. in order to get over 90 or 100 kN, the blade need to be made by crystal super alloy, "A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions"Powered super alloy is different, its composite of grains, and hence its lattice is not uniform in all directions, it will break under high temperature and high pressure such as inside jet engine.  The first engine using this crystal super alloy tech is F100 which used to power F16, India up to today has no this capability of making crystal super alloy, With Kaveri 10 level engine, with max power of 80 kN, it is impossible to make 5G fighter or even good 4 G fighter.Indians always laugh at China cannot make top engine, however, China and India are at totally different level, the engine WS10B that power  J20 or J10 is at 131 kN level ,  it shows China has mastered of making crystal super alloy blade, it is actually at 3rd generation of crystal super alloy stage. with only crystal super alloy is not enough, it also needs coating and cooling cores in side blade to for cooling purpose to reduce temperature about 500  °C , and in recent years, China has already got break through in this regards, now WS 15 engine which with temperature up to 1900 to 2000 °C has 180 kN power is in limited production and put onto J20.

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