Zonal RANS-IDDES and RANS computations of turbulent wake exposed to adverse pressure gradient

E K Guseva,M Kh Strelets,A K Travin,T Knopp,M Burnazzi

doi:10.1088/1742-6596/1135/1/012092

Abstract

Results are presented of scale-resolving Zonal RANS-IDDES and pure RANS computations of a turbulent wake exposed to adverse pressure gradient. The RANS-IDDES is performed with the use of the NTS code of SPBPU, and the RANS computations are carried with the use of the TAU code of DLR. It is shown that none of the considered RANS models (two linear eddy viscosity models and a full differential Reynolds stress transport model) is capable of reproducing the mean wake characteristics and turbulent statistics predicted by the RANS-IDDES. Accumulated RANS-IDDES database may be used for improvements of RANS models.

Highlights

Turbulent wakes exposed to Adverse Pressure Gradient (APG) are a common feature of high-lift wing flows near the maximum lift conditions, when wakes of the upstream elements of the wing are subjected to APG created by downstream elements
Considering the primary objective of the study we first dwell upon results of the grid-sensitivity study carried out for Reynolds Averaged Navier-Stokes (RANS)-IDDES
Because of the space limit, we are not able to present a systematic comparison of the RANSIDDES predictions outlined above with corresponding RANS solutions obtained with the use of the considered turbulence models and show in Figs. 7, 8 only a restricted but still representative comparison of the two approaches

Summary

Introduction

Turbulent wakes exposed to Adverse Pressure Gradient (APG) are a common feature of high-lift wing flows near the maximum lift conditions, when wakes of the upstream elements of the wing are subjected to APG created by downstream elements. Results are presented of scale-resolving Zonal RANS-IDDES and pure RANS computations of a turbulent wake exposed to adverse pressure gradient.

Results

Conclusion