Unsteadiness and Modal Analysis of Ridge Ice-Induced Separation in Post-Stall Conditions via IDDES

High-resolution simulation of shear layer oscillation induced by ridge ice in post-stall condition is conducted via the improved delayed detached-eddy simulation (IDDES) method. The flow-field evolution characteristics of large scale separation in high Reynolds number condition are described. It is...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autor principal:	TAN Xue, ZHANG Chen, XU Wenhao, WANG Fuxin, WEN Minhua
Formato:	article
Lenguaje:	ZH
Publicado:	Editorial Office of Journal of Shanghai Jiao Tong University 2021
Materias:	ridge ice shear layer oscillation numerical simulation spectrum analysis modal analysis Engineering (General). Civil engineering (General) TA1-2040 Chemical engineering TP155-156 Naval architecture. Shipbuilding. Marine engineering VM1-989
Acceso en línea:	https://doaj.org/article/c01bd97e7bc94207843526a6194b8ac2
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:c01bd97e7bc94207843526a6194b8ac2
record_format	dspace
spelling	oai:doaj.org-article:c01bd97e7bc94207843526a6194b8ac22021-12-03T02:59:23ZUnsteadiness and Modal Analysis of Ridge Ice-Induced Separation in Post-Stall Conditions via IDDES1006-246710.16183/j.cnki.jsjtu.2020.427https://doaj.org/article/c01bd97e7bc94207843526a6194b8ac22021-11-01T00:00:00Zhttp://xuebao.sjtu.edu.cn/article/2021/1006-2467/1006-2467-55-11-1333.shtmlhttps://doaj.org/toc/1006-2467High-resolution simulation of shear layer oscillation induced by ridge ice in post-stall condition is conducted via the improved delayed detached-eddy simulation (IDDES) method. The flow-field evolution characteristics of large scale separation in high Reynolds number condition are described. It is shown that the ridge ice and trailing edge of the lower surface induce the development of shear flow at the same time. The wall is not reattached by the shear layer induced by ridge ice, and the “up-wash” flow from the lower surface is interacted with the shear layer, which lead to the formation of large-scale coherent structures. Combined with the spectral analysis, the pressure pulsation located in the shear layer is characterized by two typical frequencies, which are associated with Kelvin-Helmholtz instability and appear as the vortex pairing and shedding. Based on the proper orthogonal decomposition, the dominant mode of pressure pulsation between shear layers is extracted as large-scale coherent structures. The same peak value is shown in power density spectrum of dominant mode temporal coefficient and lift coefficient, which indicates that the large-scale coherent structure is connected with lift fluctuation.TAN Xue, ZHANG Chen, XU Wenhao, WANG Fuxin, WEN MinhuaEditorial Office of Journal of Shanghai Jiao Tong Universityarticleridge iceshear layer oscillationnumerical simulationspectrum analysismodal analysisEngineering (General). Civil engineering (General)TA1-2040Chemical engineeringTP155-156Naval architecture. Shipbuilding. Marine engineeringVM1-989ZHShanghai Jiaotong Daxue xuebao, Vol 55, Iss 11, Pp 1333-1342 (2021)
institution	DOAJ
collection	DOAJ
language	ZH
topic	ridge ice shear layer oscillation numerical simulation spectrum analysis modal analysis Engineering (General). Civil engineering (General) TA1-2040 Chemical engineering TP155-156 Naval architecture. Shipbuilding. Marine engineering VM1-989
spellingShingle	ridge ice shear layer oscillation numerical simulation spectrum analysis modal analysis Engineering (General). Civil engineering (General) TA1-2040 Chemical engineering TP155-156 Naval architecture. Shipbuilding. Marine engineering VM1-989 TAN Xue, ZHANG Chen, XU Wenhao, WANG Fuxin, WEN Minhua Unsteadiness and Modal Analysis of Ridge Ice-Induced Separation in Post-Stall Conditions via IDDES
description	High-resolution simulation of shear layer oscillation induced by ridge ice in post-stall condition is conducted via the improved delayed detached-eddy simulation (IDDES) method. The flow-field evolution characteristics of large scale separation in high Reynolds number condition are described. It is shown that the ridge ice and trailing edge of the lower surface induce the development of shear flow at the same time. The wall is not reattached by the shear layer induced by ridge ice, and the “up-wash” flow from the lower surface is interacted with the shear layer, which lead to the formation of large-scale coherent structures. Combined with the spectral analysis, the pressure pulsation located in the shear layer is characterized by two typical frequencies, which are associated with Kelvin-Helmholtz instability and appear as the vortex pairing and shedding. Based on the proper orthogonal decomposition, the dominant mode of pressure pulsation between shear layers is extracted as large-scale coherent structures. The same peak value is shown in power density spectrum of dominant mode temporal coefficient and lift coefficient, which indicates that the large-scale coherent structure is connected with lift fluctuation.
format	article
author	TAN Xue, ZHANG Chen, XU Wenhao, WANG Fuxin, WEN Minhua
author_facet	TAN Xue, ZHANG Chen, XU Wenhao, WANG Fuxin, WEN Minhua
author_sort	TAN Xue, ZHANG Chen, XU Wenhao, WANG Fuxin, WEN Minhua
title	Unsteadiness and Modal Analysis of Ridge Ice-Induced Separation in Post-Stall Conditions via IDDES
title_short	Unsteadiness and Modal Analysis of Ridge Ice-Induced Separation in Post-Stall Conditions via IDDES
title_full	Unsteadiness and Modal Analysis of Ridge Ice-Induced Separation in Post-Stall Conditions via IDDES
title_fullStr	Unsteadiness and Modal Analysis of Ridge Ice-Induced Separation in Post-Stall Conditions via IDDES
title_full_unstemmed	Unsteadiness and Modal Analysis of Ridge Ice-Induced Separation in Post-Stall Conditions via IDDES
title_sort	unsteadiness and modal analysis of ridge ice-induced separation in post-stall conditions via iddes
publisher	Editorial Office of Journal of Shanghai Jiao Tong University
publishDate	2021
url	https://doaj.org/article/c01bd97e7bc94207843526a6194b8ac2
work_keys_str_mv	AT tanxuezhangchenxuwenhaowangfuxinwenminhua unsteadinessandmodalanalysisofridgeiceinducedseparationinpoststallconditionsviaiddes
_version_	1718373953190232064

Unsteadiness and Modal Analysis of Ridge Ice-Induced Separation in Post-Stall Conditions via IDDES

Ejemplares similares