Imperial College London
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Professor Mehdi Vahdati

Faculty of Engineering, Department of Mechanical Engineering

Principal Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 7073m.vahdati

 
 
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Location

 

606City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{He:2021:10.1115/GT2021-59077,
author = {He, X and Zhao, F and Vahdati, M},
doi = {10.1115/GT2021-59077},
title = {Detached eddy simulation: Recent development and application to compressor tip leakage flow},
url = {http://dx.doi.org/10.1115/GT2021-59077},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - Detached Eddy Simulation (DES) and its variants are emerging tools for turbomachinery simulations. In this paper, the state-of-the-art upgrades of DES are reviewed, and their capabilities in predicting compressor tip leakage flow are discussed. The upgrade with the best potential is identified as the Delayed DES (DDES) method with the grid spacing FKHδhyb, which unlocks the physics of the Kelvin-Helmholtz instability in compressor tip leakage flow. The upgraded grid spacing FKHδhyb is compared against the widely used default one δmax in a backward-facing step and a low-speed axial compressor rotor. Results show that the DDES method with FKHδhyb predicts both the main flow field and the turbulence field with reasonably good accuracy. However, the original DDES method with δmax predicts a delayed transition to turbulence, which leads to an inaccurate prediction of the main flow field when using a coarse mesh. The findings in this paper highlight the future opportunities for using the DDES-FKHδhyb method to predict tip-driven compressor stall and generate a turbulence database for turbulence model development.
AU  - He,X
AU  - Zhao,F
AU  - Vahdati,M
DO  - 10.1115/GT2021-59077
PY  - 2021///
TI  - Detached eddy simulation: Recent development and application to compressor tip leakage flow
UR  - http://dx.doi.org/10.1115/GT2021-59077
ER  -
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