核心机驱动风扇级匹配特性分析

doi:10.7527/S1000-6893.2015.0060

Abstract

Abstract:

The matching characteristics of the core driven fan stage (CDFS) in a double bypass engine (DBE) have been investigated with CDFS matching map and numerical simulation (taking the single bypass mode operating point as the design point and the double bypass mode operating mode as the matching point). The results show that given the matching massflow rate and pressure ratio in the double bypass mode, the aerodynamic load decreases for the rotor and increases for the stator. The best CDFS performance can be reached at a proper matching speed. For a given matching massflow rate and speed in the double bypass mode, both the aerodynamic loads of the rotor and stator can be increased by increasing matching pressure ratio, which in turn increase the efficiency and decrease the stall margin. If only the matching massflow rate is given, excellent performance can be reached by adjusting the matching speed and pressure ratio under a certain constraint.

Key words: double bypass engine, core driven fan stage, matching, operating characteristics, numerical simulation

CLC Number:

V235.13

ZHANG Xin, LIU Baojie. Matching characteristics of core driven fan stage[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(9): 2850-2858.

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Matching characteristics of core driven fan stage

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