Study of spiral flow generated through an annular slit
Study of spiral flow generated through an annular slit
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DOI：
10.1007/s11630-005-0017-z
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发表时间：
2005-06
影响因子：
2.5
通讯作者：
Tae Hun Kim;S. Matsuo;T. Setoguchi;H. Kim
中科院分区：
文献类型：
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作者：
Tae Hun Kim;S. Matsuo;T. Setoguchi;H. Kim
通过数值模拟研究了环形缝上游贮液室中增压空气入口对轴向和切向速度分量特性的影响，阐明了螺旋喷嘴流动产生的机理。在仿真中，使用统一的航空航天计算仿真平台（UPACS）。所考虑的控制方程是非定常可压缩Navier-Stokes方程.空间导数采用MUSCL（Roe格式）二阶有限体积格式离散，粘性项采用二阶中心差分格式，时间积分采用MFGS（Matrix Free Gauss Seidel）格式。湍流模型采用Spalart-Allmaras模型。并将所得结果与双分量光纤激光多普勒测速系统测量的速度分布进行了比较。不连续增压进气道的存在导致非对称特性的出现，是螺旋流形成的一个非常重要的因素。
The effect of pressurized air inlets in the reservoir upstream of the annular slit on characteristics of the axial and tangential velocity components is investigated numerically, and the mechanism of occurrence of spiral nozzle flow is clarified. In simulations, Unified Platform for Aerospace Computational Simulation (UPACS) is used. The governing equations under consideration are the unsteady compressible Navier - Stokes. A second-order finite volume scheme with MUSCL (Roe scheme) is used to discretize the spatial derivatives, and a second order-central difference scheme for the viscous terms, and a MFGS (Matrix Free Gauss Seidel) is employed for time integration. Spalart-Allmaras model was used as a turbulence model. The results obtained are compared with velocity distributions in the experiment measured by the two-component fiber optic laser Doppler velocimeter system. The existence of discrete pressurized air inlets that leads to the occurrence of asymmetrical characteristics is a very important factor for the formation of spiral flow.