Session: 31-12 Inlet Distortion

Paper Number: 127281

127281 - Effect of Rear Engine Concept Distortion on the Aerodynamic Performance of a Fan Rotor 

Boundary layer suction technology (BLI) propulsion system can bring considerable fuel savings, but the corresponding inlet distortion will have a negative impact on the performance of the fan. One of the most important problems to be solved for BLI technology is to reasonably estimate and control the performance loss caused by inlet distortion. What’s more, the related research on rear engine concept (REC) is relatively lacking, and further research is needed. The effect of BLI inlet distortion on fan performance of REC aircraft is studied by CFX software. The obtained engine inlet conditions are converted into the inlet boundary conditions of NASA rotor 67 under the whole space simulation, and the full-annulus unsteady Reynolds averaged Navier-Stokes(URANS) simulation is carried out. According to the results, the overall performance parameters of the fan such as total pressure ratio, efficiency and stall margin were compared and analyzed to study the effect of BLI distortion under REC on the fan characteristics. The transformation and transmission of distortion in the fan are investigated by the changes of static pressure distribution, velocity distribution and entropy loss. Results show that Inlet distortion-caused total pressure distortion and total temperature distortion continue to the end of the fan. Due to the influence of the rotor, the distortion is offset in the circumferential direction. The distortion predominantly exists in the leaf channels affected by the inlet distortion, with the continuation effect of distortion in other leaf channels not obvious.

Presenting Author: Yifan Xue Shanghai Jiao Tong University

Presenting Author Biography: The author is a graduate student from school of Aeronautics and Astronautics, Shanghai Jiao Tong University, majoring in Aerospace Propulsion Engineering. Recently he is interested in the BLI distortion and the application of the electrically propelled aircraft with the hope to broaden horizons and to communicate with researchers having same interests.

Authors:

Yifan Xue Shanghai Jiao Tong University
Hefang Deng Shanghai Jiao Tong University
Xiaoqing Qiang Shanghai Jiao Tong University