Numerical study on the influence of wall temperature gradient on aerodynamic characteristics of low aspect ratio flying wing configuration

Abstract With the aim for a low-aspect-ratio flying wing configuration, this study explores the influence of wall temperature gradient on the laminar and turbulent boundary layers of aircraft surface and determines the effect on the transition Reynolds number and wall friction drag. A four-equation...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Peng Lin, Xueqiang Liu, Neng Xiong, Xiaobing Wang, Ma Shang, Guangyuan Liu, Yang Tao
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/66e4016d41dc47bfada51f979e77cf39
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:66e4016d41dc47bfada51f979e77cf39
record_format	dspace
spelling	oai:doaj.org-article:66e4016d41dc47bfada51f979e77cf392021-12-02T16:28:06ZNumerical study on the influence of wall temperature gradient on aerodynamic characteristics of low aspect ratio flying wing configuration10.1038/s41598-021-94261-x2045-2322https://doaj.org/article/66e4016d41dc47bfada51f979e77cf392021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94261-xhttps://doaj.org/toc/2045-2322Abstract With the aim for a low-aspect-ratio flying wing configuration, this study explores the influence of wall temperature gradient on the laminar and turbulent boundary layers of aircraft surface and determines the effect on the transition Reynolds number and wall friction drag. A four-equation turbulence model with transition mode is used to numerically simulate the flow around the model. The variation of wall friction coefficient, transition Reynolds number, and turbulent boundary layer flow with wall temperature are emphatically investigated. Results show that when the wall temperature increases from 288 to 500 K, the boundary layer transition Reynolds number for the wing section increased by approximately 28% and the surface friction drags decreases by approximately 10.7%. The hot wall enhances the viscous effects of the laminar temperature boundary layer, reduces the Reynolds shear stress and turbulent kinetic energy, and increases the flow stability. However, the velocity gradient and shear stress in the bottom of the turbulent boundary layer decreases, which leads to reduced friction shear stress on the wall surface. Therefore, for the low-aspect-ratio flying wing model, the hot wall can delay the boundary layer transition and reduce the friction drag coefficient in the turbulent region.Peng LinXueqiang LiuNeng XiongXiaobing WangMa ShangGuangyuan LiuYang TaoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Peng Lin Xueqiang Liu Neng Xiong Xiaobing Wang Ma Shang Guangyuan Liu Yang Tao Numerical study on the influence of wall temperature gradient on aerodynamic characteristics of low aspect ratio flying wing configuration
description	Abstract With the aim for a low-aspect-ratio flying wing configuration, this study explores the influence of wall temperature gradient on the laminar and turbulent boundary layers of aircraft surface and determines the effect on the transition Reynolds number and wall friction drag. A four-equation turbulence model with transition mode is used to numerically simulate the flow around the model. The variation of wall friction coefficient, transition Reynolds number, and turbulent boundary layer flow with wall temperature are emphatically investigated. Results show that when the wall temperature increases from 288 to 500 K, the boundary layer transition Reynolds number for the wing section increased by approximately 28% and the surface friction drags decreases by approximately 10.7%. The hot wall enhances the viscous effects of the laminar temperature boundary layer, reduces the Reynolds shear stress and turbulent kinetic energy, and increases the flow stability. However, the velocity gradient and shear stress in the bottom of the turbulent boundary layer decreases, which leads to reduced friction shear stress on the wall surface. Therefore, for the low-aspect-ratio flying wing model, the hot wall can delay the boundary layer transition and reduce the friction drag coefficient in the turbulent region.
format	article
author	Peng Lin Xueqiang Liu Neng Xiong Xiaobing Wang Ma Shang Guangyuan Liu Yang Tao
author_facet	Peng Lin Xueqiang Liu Neng Xiong Xiaobing Wang Ma Shang Guangyuan Liu Yang Tao
author_sort	Peng Lin
title	Numerical study on the influence of wall temperature gradient on aerodynamic characteristics of low aspect ratio flying wing configuration
title_short	Numerical study on the influence of wall temperature gradient on aerodynamic characteristics of low aspect ratio flying wing configuration
title_full	Numerical study on the influence of wall temperature gradient on aerodynamic characteristics of low aspect ratio flying wing configuration
title_fullStr	Numerical study on the influence of wall temperature gradient on aerodynamic characteristics of low aspect ratio flying wing configuration
title_full_unstemmed	Numerical study on the influence of wall temperature gradient on aerodynamic characteristics of low aspect ratio flying wing configuration
title_sort	numerical study on the influence of wall temperature gradient on aerodynamic characteristics of low aspect ratio flying wing configuration
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/66e4016d41dc47bfada51f979e77cf39
work_keys_str_mv	AT penglin numericalstudyontheinfluenceofwalltemperaturegradientonaerodynamiccharacteristicsoflowaspectratioflyingwingconfiguration AT xueqiangliu numericalstudyontheinfluenceofwalltemperaturegradientonaerodynamiccharacteristicsoflowaspectratioflyingwingconfiguration AT nengxiong numericalstudyontheinfluenceofwalltemperaturegradientonaerodynamiccharacteristicsoflowaspectratioflyingwingconfiguration AT xiaobingwang numericalstudyontheinfluenceofwalltemperaturegradientonaerodynamiccharacteristicsoflowaspectratioflyingwingconfiguration AT mashang numericalstudyontheinfluenceofwalltemperaturegradientonaerodynamiccharacteristicsoflowaspectratioflyingwingconfiguration AT guangyuanliu numericalstudyontheinfluenceofwalltemperaturegradientonaerodynamiccharacteristicsoflowaspectratioflyingwingconfiguration AT yangtao numericalstudyontheinfluenceofwalltemperaturegradientonaerodynamiccharacteristicsoflowaspectratioflyingwingconfiguration
_version_	1718383934234951680

Numerical study on the influence of wall temperature gradient on aerodynamic characteristics of low aspect ratio flying wing configuration

Ejemplares similares