Variable nozzle turbocharger (VNT) can improve the low-speed performance and emission of turbocharged diesel engine. Turbine experiment of JK90S turbocharger with rotating vanes was undertaken.

将所设计的JK90S转叶式可变喷嘴涡轮增压器进行了涡轮性能试验。

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FL-7 is a continuous transonic wind tunnel, which is powered by three engines. Mach number is adjusted by the rotating speed of engines, the flexible wall nozzle and the by-pass valve.

7风洞是以三台航空发动机为动力的跨音速风洞，通过调节发动机转速、柔壁及旁路活门开度来实现对M数的控制。

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FL-7 is a continuous transonic wind tunnel, which is powered by three engines. Mach number is adjusted by the rotating speed of engines, the flexible wall nozzle and the by-pass valve.

FL - 7风洞是以三台航空发动机为动力的跨音速风洞，通过调节发动机转速、柔壁及旁路活门开度来实现对M数的控制。

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