Assessment of Delayed Detached-Eddy Simulation of Dynamic Stall on a Rotor
Assessment of Delayed Detached-Eddy Simulation of Dynamic Stall on a Rotor
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转子动态失速的延迟分离涡模拟评估
DOI:
10.1007/978-3-030-27607-2_25
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Ewald Krämer
中科院分区:
文献类型:
--
作者:
Johannes Letzgus;Pascal Weihing;Manuel Keßler;Ewald Krämer
High-fidelity unsteady Reynolds–averaged Navier–Stokes (URANS) and Menter-SST delayed detached-eddy simulations (DDES) of dynamic stall on a rotor with cyclic pitch control are presented and compared to experimental surface pressures and particle-image-velocimetry (PIV) data. Before the dynamic-stall event, the DDES suffers from modeled-stress depletion (MSD) leading to grid-induced separation (GIS) due to a breakdown of the boundary-layer shielding function. Combined with the “grey-area” problem, this leads to severe erroneous load peaks. After dynamic stall, flow is completely separated and only DDES shows realistic small-scale, incoherent vortical structures. Two approaches are investigated to eliminate MSD/GIS: Firstly, increasing the empirical constantof thefunction to 30 basically eliminates GIS. Secondly, a non-local, grid-independent vorticity-integrated algebraic DES, which replaces thefunction, is introduced that provides robust boundary-layer shielding and enables the LES mode in case of massive flow separation.
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DOI:
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发表时间:
2018
期刊:
影响因子:
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作者:
C. Mockett;W. Haase;D. Schwamborn
通讯作者:
D. Schwamborn
DOI:
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发表时间:
2016
期刊:
影响因子:
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作者:
P. Weihing;Johannes Letzgus;G. Bangga;T. Lutz;E. Krämer
通讯作者:
E. Krämer
DOI:
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发表时间:
2017
期刊:
影响因子:
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作者:
V. Vatsa;D. Lockard;P. Spalart
通讯作者:
P. Spalart
DOI:
10.1007/978-3-030-27607-2_8
发表时间:
2020
期刊:
Progress in Hybrid RANS-LES Modelling
影响因子:
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作者:
Pascal Weihing;Johannes Letzgus;Thorsten Lutz;Ewald Krämer
通讯作者:
Ewald Krämer
DOI:
10.1007/978-3-319-70031-1_3
发表时间:
2016-09
期刊:
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影响因子:
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作者:
F. Menter
通讯作者:
F. Menter