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首页> 外文期刊>International Journal for Numerical Methods in Fluids >A PRESSURE-BASED ALGORITHM FOR HIGH-SPEED TURBOMACHINERY FLOWS
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A PRESSURE-BASED ALGORITHM FOR HIGH-SPEED TURBOMACHINERY FLOWS

机译：高速涡轮机械流的基于压力的算法

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摘要

The steady state Navier-Stokes equations are solved in transonic flows using an elliptic formulation. A segregated solution algorithm is established in which the pressure correction equation is utilized to enforce the divergence-free mass flux constraint. The momentum equations are solved in terms of the primitive variables, while the pressure correction field is used to update both the convecting mass flux components and the pressure itself. The velocity components are deduced from the corrected mass fluxes on the basis of an upwind-biased density, which is a mechanism capable of overcoming the ellipticity of the system of equations, in the transonic flow regime. An incomplete LU decomposition is used for the solution of the transport-type equations and a globally minimized residual method resolves the pressure correction equation. Turbulence is resolved through the k- model. Dealing with turbomachinery applications, results are presented in two-dimensional compressor and turbine cascades under design and off-design conditions.
机译：使用椭圆公式在跨音速流中求解稳态Navier-Stokes方程。建立了分离求解算法，其中压力校正方程式用于强制执行无散度质量通量约束。动量方程根据原始变量进行求解，而压力校正字段用于更新对流质量通量分量和压力本身。速度分量是根据逆风密度从逆向质量密度的基础上从校正的质量通量推导出的，该密度是一种能够克服跨音速流方程组椭圆率的机制。不完全LU分解用于运输类型方程式的求解，而全局最小化残差法可解决压力校正方程式。湍流通过k模型解析。处理涡轮机械应用时，在设计和非设计条件下以二维压缩机和涡轮机叶栅的形式展示了结果。

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