| Citation: | HAN Hongyang, HUANG Xiuquan, WANG Dingxi. Influence of aircraft wake distortion on performance of tail-installed boundary layer ingestion fan[J]. Journal of Aerospace Power, 2026, 41（4）：20240082 doi: 10.13224/j.cnki.jasp.20240082
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Boundary Layer Ingestion (BLI) aircrafts position their propulsion systems close to the fuselage surface to ingest the boundary layer airflow and wake as the propulsive working fluid, thereby reducing carbon dioxide emissions and fuel consumption. However, due to the influence of inflow distortion, the propulsor may deviate from its design operating conditions, resulting in performance degradation and hindering of the development of the aircraft configuration. Therefore, a numerical simulation was conducted to investigate the performance deterioration of the aft-mounted propulsive fan in the STARC-ABL configured BLI aircraft under distorted inflow conditions. The results showed that the aircraft wake exhibited two key characteristics: non-uniform velocity distribution and a high turbulent viscosity ratio. When the fan operated by ingesting the wake, its pressure ratio, isentropic efficiency, and stability margin decreased significantly. Radial inflow distortion affected the airflow turning angle through the rotor, altering the fan's work capacity and reducing its pressure ratio. Circumferential inflow distortion deteriorated the internal flow within the fan, intensifying flow separation and shock waves in the blade passages, which simultaneously reduced both the pressure ratio and isentropic efficiency. The high turbulent viscosity ratio of the incoming flow enhanced internal flow mixing, and increased flow losses, leading to a notable decline in both the pressure ratio and isentropic efficiency of the fan.
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