32th Congress of the International Council of the Aeronautical Sciences

05 - Propulsion

MODELING OF COUNTER-ROTATING LIFT FAN/MAIN ENGINE COMBINED PROPULSION SYSTEM AND LIFT FAN AERODYNAMIC DESIGN

H.-L. Jin, China; X. Chen, China; D.-B. Qiu, China; Y.-Q. Yin, China

This paper builds the model of lift fan gross parameters in the whole propulsion system. Some lift fan design parameters were optimized in the whole propulsion system. Based on these optimized parameters, the design of high through flow counter-rotating lift fan without outlet stator blade was accomplished by using the technology of 3D computational fluid dynamic. At last, F135ís counter-rotating lift-fan was optimized using this method. The fanís performance was established by the method of computational fluid dynamics. Compared with the result of F135, it shows that: The thrust per unit power and thrust per unit area were increased by 15% and by 16% respectively.


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