Session: 01-06 Inlet Distortion and Engine Operability

Paper Number: 102781

102781 - Experimental Study on Total Pressure Distortion Characteristics of a High Bypass Ratio Turbofan Engine 

Relative to the surge and stall compliance governed by civil aviation airworthiness regulation of FAR/CCAR33.65, the engine needs to have adequate operability in its operating envelope. That requires engine compression components to have sufficient surge margin. Inlet distortion is one of the main factors affecting compression components' surge margin and engine operability. According to the civil aero engine operation scenario, the most likely cause for total pressure distortion formed by the uneven flow field at the exit of the inlet is crosswind condition. In order to quantify the inlet distortion characteristics and understand the distortion attenuation for each compression component of a high bypass ratio turbofan engine，a whole engine crosswind test was conducted in an outdoor test facility. Four different crosswind speed conditions were simulated by a crosswind generation device, and the distortion characteristics in terms of distortion index was measured by aberration rake in the test. The test results show that for this high bypass ratio turbofan engine, the inlet distortion is mainly distributed in the area of 60% height of fan blade at different crosswind speed conditions, and do not enter the engine inner flowpath. Therefore, distortion caused by the crosswind will not affect the surge margin of the booster and high pressure compressor.

Presenting Author: Huihui Li 1.School of Aeronautics and Astronautics, Shanghai JiaoTong University, 2. AECC Commercial Aircraft Engine Co., LTD

Presenting Author Biography: 2003-2010 Nanjing University of Aeronautics and Astronautics
2010-2022 AECC Commercial Aircraft Engine Co., LTD
2020-2022 School of Aeronautics and Astronautics, Shanghai JiaoTong University

Authors:

Huihui Li 1.School of Aeronautics and Astronautics, Shanghai JiaoTong University, 2. AECC Commercial Aircraft Engine Co., LTD
Jinfang Teng School of Aeronautics and Astronautics, Shanghai JiaoTong University
Guangqi Luo AECC Commercial Aircraft Engine Co., LTD
Shangnan Zheng AECC Commercial Aircraft Engine Co., LTD
Chongyang Lv AECC Commercial Aircraft Engine Co., LTD
Chao Qiu AECC Commercial Aircraft Engine Co., LTD