Work

LES Study on the Mechanism of Wake Vortex Shedding in Transonic Turbine

Year: 2025

Type: article

Abstract: This work employs a high-resolution large eddy simulation (LES) to reveal the unsteady flow characteristics of transonic turbine cascades. The results show that a distinct dovetail-shaped shock wave structure forms at the trailing edge of the cascade. PS-TE-shock impingement on the adjacent suction surface triggers boundary layer separation and rapid transition to turbulence. Wake shedding originates from shear-driven vortices forming at the trailing-edge shock intersection and detaching periodically. Pressure waves generated during shedding prop agate downstream along the PS-TE-shock, impacting the suction surface boundary layer and influencing its flow. POD analysis further elucidates the pressure wave propagation path.

Source: International Journal of Aeronautical and Space Sciences

DOI: 10.1007/s42405-025-01089-0

Authors: Xingshuang Wu, Rongfei Yang, Guoliang Wang, Hao Wang, Ning Ge

Institutions: Nanjing University of Aeronautics and Astronautics, China Aerodynamics Research and Development Center

Language: English

Topic: Turbomachinery Performance and Optimization

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,490

Funder: National Science and Technology Major Project