Receptivity of the Boundary Layer over a Blunt Wedge with Distributed Roughness at Mach 6

A hypersonic flow field over a blunt wedge with or without roughness is simulated by a direct numerical simulation method. The effect of isolated and distributed roughnesses on the steady and unsteady hypersonic flow field and boundary layer is analyzed. The shape of roughness is controlled by cubic...

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Main Authors: Zhenqing Wang, Mingfang Shi, Xiaojun Tang, Lidan Xu, Xiaokun Sun
Format: Article
Language:English
Published: Wiley 2018-01-01
Series:International Journal of Aerospace Engineering
Online Access:http://dx.doi.org/10.1155/2018/7234706
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author Zhenqing Wang
Mingfang Shi
Xiaojun Tang
Lidan Xu
Xiaokun Sun
author_facet Zhenqing Wang
Mingfang Shi
Xiaojun Tang
Lidan Xu
Xiaokun Sun
author_sort Zhenqing Wang
collection DOAJ
description A hypersonic flow field over a blunt wedge with or without roughness is simulated by a direct numerical simulation method. The effect of isolated and distributed roughnesses on the steady and unsteady hypersonic flow field and boundary layer is analyzed. The shape of roughness is controlled by cubic polynomial. The evolution of disturbance waves caused by slow acoustic wave in the boundary layer is investigated by fast Fourier spectrum analysis. The results show that there is a great influence of roughness on the evolution of disturbance waves in the hypersonic boundary layer. The disturbance waves are promoted in the upstream-half region of roughness while suppressed in the downstream-half region of roughness. There is always a mode competition among different modes both in the temporal domain and in the frequency domain in the boundary layer, and mode competition is affected by roughness. The location of the dominant mode which is changed to a second-order harmonic mode from the fundamental mode moves upstream. The vortices caused by roughness also impact the evolution of disturbance waves in the boundary layer. The fundamental mode is suppressed in the vortex region while other harmonic modes are promoted.
format Article
id doaj-art-d39e16754b4f4aafa8a4eb2b1c148e8d
institution Kabale University
issn 1687-5966
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language English
publishDate 2018-01-01
publisher Wiley
record_format Article
series International Journal of Aerospace Engineering
spelling doaj-art-d39e16754b4f4aafa8a4eb2b1c148e8d2025-02-03T06:11:21ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742018-01-01201810.1155/2018/72347067234706Receptivity of the Boundary Layer over a Blunt Wedge with Distributed Roughness at Mach 6Zhenqing Wang0Mingfang Shi1Xiaojun Tang2Lidan Xu3Xiaokun Sun4College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaChina Academy of Space Technology, Beijing 100094, ChinaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaA hypersonic flow field over a blunt wedge with or without roughness is simulated by a direct numerical simulation method. The effect of isolated and distributed roughnesses on the steady and unsteady hypersonic flow field and boundary layer is analyzed. The shape of roughness is controlled by cubic polynomial. The evolution of disturbance waves caused by slow acoustic wave in the boundary layer is investigated by fast Fourier spectrum analysis. The results show that there is a great influence of roughness on the evolution of disturbance waves in the hypersonic boundary layer. The disturbance waves are promoted in the upstream-half region of roughness while suppressed in the downstream-half region of roughness. There is always a mode competition among different modes both in the temporal domain and in the frequency domain in the boundary layer, and mode competition is affected by roughness. The location of the dominant mode which is changed to a second-order harmonic mode from the fundamental mode moves upstream. The vortices caused by roughness also impact the evolution of disturbance waves in the boundary layer. The fundamental mode is suppressed in the vortex region while other harmonic modes are promoted.http://dx.doi.org/10.1155/2018/7234706
spellingShingle Zhenqing Wang
Mingfang Shi
Xiaojun Tang
Lidan Xu
Xiaokun Sun
Receptivity of the Boundary Layer over a Blunt Wedge with Distributed Roughness at Mach 6
International Journal of Aerospace Engineering
title Receptivity of the Boundary Layer over a Blunt Wedge with Distributed Roughness at Mach 6
title_full Receptivity of the Boundary Layer over a Blunt Wedge with Distributed Roughness at Mach 6
title_fullStr Receptivity of the Boundary Layer over a Blunt Wedge with Distributed Roughness at Mach 6
title_full_unstemmed Receptivity of the Boundary Layer over a Blunt Wedge with Distributed Roughness at Mach 6
title_short Receptivity of the Boundary Layer over a Blunt Wedge with Distributed Roughness at Mach 6
title_sort receptivity of the boundary layer over a blunt wedge with distributed roughness at mach 6
url http://dx.doi.org/10.1155/2018/7234706
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AT mingfangshi receptivityoftheboundarylayeroverabluntwedgewithdistributedroughnessatmach6
AT xiaojuntang receptivityoftheboundarylayeroverabluntwedgewithdistributedroughnessatmach6
AT lidanxu receptivityoftheboundarylayeroverabluntwedgewithdistributedroughnessatmach6
AT xiaokunsun receptivityoftheboundarylayeroverabluntwedgewithdistributedroughnessatmach6