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	DNS of incompressible turbulent reacting flows and validation of the RANS turbulence-chemistry model
	Wang Fang ; Zhou Li-xing ; Xu Chun-xiao ; Huang Yong
	2010-10-12 ; 2010-10-12
关键词	Practical/ aerospace propulsion channel flow chemical reactions chemically reactive flow flow simulation Navier-Stokes equations numerical analysis turbulence/ incompressible turbulent reacting flows turbulence-chemistry model direct numerical simulation flow simulation reacting channel flows turbulence fluctuation database Reynolds averaged Navier-Stokes equations chemical reaction aerospace propulsion system/ A4785 Applied fluid mechanics A4770F Chemically reactive flows A4760 Flows in ducts, channels, and conduits A4725 Turbulent flows, convection, and heat transfer A4710 General fluid dynamics theory, simulation and other computational methods A0260 Numerical approximation and analysis E3650C Aerospace industry E2130 Fluid mechanics and aerodynamics (mechanical engineering) E0210L Numerical analysis
中文摘要	The direct numerical simulation (DNS) of well-developed three-dimensional incompressible turbulent reacting channel flows was carried out by using a spectral method. The instantaneous turbulence fluctuation database with the coupling of temperature and mass fraction was gained. The instantaneous results show that both the temperature fluctuation and the mass fraction fluctuation have strip structures in the near wall region. Exact transport equations of the correlations for the second order moment reaction model in the Reynolds averaged Navier-Stokes equations (RANS-SOM) are deducted. As for the correction of the reaction rate coefficient and mass fraction, the dissipation term is key to model closure, and consideration of reaction for the dissipation term of the model equation is necessary. Based on the statistical results of the DNS database, a priori study on the budget of each term in the RANS-SOM model correlations transport equations was carried out. It is found that the contributions from the production and dissipation terms are most important, whereas the contributions from the diffusion and reaction terms are rather small. The chemical reaction has obvious influence on the magnitude and distribution of all the terms. Moreover, in the studied cases in this paper, the correlation of reaction rate coefficient and mass fraction which is obtained by DNS database statistical results is close to the value obtained by the algebra second order moment (ASOM) model prediction, affirming reasonableness of ASOM model.
语种	中文
出版者	Editorial Department of the Journal of Aerospace Power ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78968]
专题	清华大学
推荐引用方式 GB/T 7714	Wang Fang,Zhou Li-xing,Xu Chun-xiao,et al. DNS of incompressible turbulent reacting flows and validation of the RANS turbulence-chemistry model[J],2010, 2010.
APA	Wang Fang,Zhou Li-xing,Xu Chun-xiao,&Huang Yong.(2010).DNS of incompressible turbulent reacting flows and validation of the RANS turbulence-chemistry model..
MLA	Wang Fang,et al."DNS of incompressible turbulent reacting flows and validation of the RANS turbulence-chemistry model".(2010).

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