SIMULATION OF PASSING WAKES INDUCING UNSTEADY BOUNDARY LAYER TRANSITION AROUND LOW-PRESSURE TURBINE BLADE

被引：0

作者：

Dufau, Antoine ^{[1
]}

Marty, Julien ^{[2
]}

Man, Daniel ^{[1
]}

Piot, Estelle ^{[3
]}

机构：

[1] Safran Aircfaft Engines, Turbine Dept, F-77550 Moissy Cramayel, France

[2] ONERA French Aerosp Lab, Aerodynam Aeroelast Acoust Dept, F-92190 Meudon, France

[3] ONERA French Aerosp Lab, Multiphys Energet Dept, F-31000 Toulouse, France

来源：

PROCEEDINGS OF ASME TURBO EXPO 2021: TURBOMACHINERY TECHNICAL CONFERENCE AND EXPOSITION, VOL 2B | 2021年

关键词：

LOCAL VARIABLES; INCOMING WAKES;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The present study focuses on the very high-lift T106C cascade with passing wakes and aims to validate the gamma-(Re-theta) over bar model of Menter-Langtry used to predict laminar-turbulent transition based on unsteady Reynolds-Averaged Navier-Stokes simulations. The comparison to experimental data provided by Von Karman Institute, shows that the transition model is able to capture the influence of passing wakes on transition phenomenon. Like the experiments, the simulations show a reduction of the time-averaged separation bubble length and of the overall losses in the presence of passing wakes. For this numerical study, four other wakes have been generated in order to study the influence of wake parameters on the transition onset, on the laminar separation bubble formation and on the turbine cascade performances. For a given averaged turbulence intensity and total pressure deficit, thinner wakes seem to have a more positive effect on boundary layer, reducing the separation and the overall losses.

引用

页数：11

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