Numerical study of the effect of boundary layer ingestion on the flow field


	distortion of S-shaped intake

Abstract

Abstract:

: In order to study the effect of boundary layer ingestion (BLI) on the flow field distortion of the S-Shaped intake, a

short spread pressure and small offset S-shaped intake is designed in this paper, the effect of BLI on the flow field

characteristic of S-shaped intake is analyzed, and the effect of inhaling boundary layers of different thicknesses on

the outlet flow field is further researched. The results show that when the boundary layer is inhaling, the three-dimensional separation flow of the fluid inside the inlet forms a twin swirl distortion zone, low-energy fluid accumulated at the bottom of the intake tract, and forms a unique concave shape total pressure distortion zone at the exit

position. With the increase of the thickness of the suction boundary layer, the flow capacity of the inlet tract decreases, and the total pressure distortion intensity and range at the outlet section increase. However, the range of

swirl distortion slightly increases, and there is no significant change in swirl intensity.

Key words:

boundary layer ingestion, S-shaped intake, total pressure distortion, swirl distortion

CLC Number:

V231.3

FU Wenguang, XIAO Lei, SUN Peng.

Numerical study of the effect of boundary layer ingestion on the flow field

distortion of S-shaped intake

[J]. Journal of Civil Aviation University of China, 2025, 43(1): 33-40.

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Numerical study of the effect of boundary layer ingestion on the flow field

distortion of S-shaped intake

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