Ad-Hoc Boundary Conditions for CFD Analyses of Turbomachinery Problems With Strong Flow Gradients at Farfield Boundaries
Ad-Hoc Boundary Conditions for CFD Analyses of Turbomachinery Problems With Strong Flow Gradients at Farfield Boundaries
复制标题
远场边界强流动梯度涡轮机械问题 CFD 分析的临时边界条件
DOI:
10.1115/1.4002985
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发表时间:
2011
期刊:
影响因子:
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通讯作者:
Campobasso M
中科院分区:
文献类型:
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作者:
Campobasso M
This paper reports on the improvements of flux enforcement and auxiliary state farfield boundary conditions for Euler and Navier–Stokes computational fluid dynamics (CFD) codes. The new conditions are based on 1D characteristic data and also on the introduction in the boundary conditions of certain numerical features of the numerical scheme used for the interior of the domain. In the presence of strong streamwise gradients of the flow field at the farfield boundaries, the new conditions perform significantly better than their conventional counterparts in that they (a) preserve the order of the space-discretization and (b) greatly reduce the error in estimating integral output. A coarse-grid CFD analysis of the compressible flow field in an annular duct for which an analytical solution is available yields a mass flow error of 62% or 2%, depending on whether the best or the worst farfield boundary condition (BC) implementation is used. The presented BC enhancements can be applied to structured, unstructured, cell-centered, and cell-vertex solvers.
DOI:
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发表时间:
2009
期刊:
影响因子:
--
作者:
M. Campobasso;A. Bonfiglioli;M. Ahmadi
通讯作者:
M. Ahmadi
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
A. Bonfiglioli;B. Carpentieri;S. Campobasso
通讯作者:
S. Campobasso