A Computational Study of Torque and Forces Due to Compressible Flow on a Butterfly Valve Disk in Mid-stroke Position
A Computational Study of Torque and Forces Due to Compressible Flow on a Butterfly Valve Disk in Mid-stroke Position
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DOI：
10.1115/1.2236129
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发表时间：
2006-09
影响因子：
2
通讯作者：
Zachary Leutwyler;C. Dalton
中科院分区：
文献类型：
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作者：
Zachary Leutwyler;C. Dalton
利用计算流体动力学（CFD）研究了在可压缩流中运行的展弦比为0.18的双凸圆弧盘的2-D模型上精确预测气动扭矩和升阻力的能力。Fluent 6.0是用于执行这些计算的CFD软件包。首先分析了网格收敛和时间收敛/稳定性，然后对Spalart-Allmaras、k-e和k-ω湍流模型及其增强特性和模型变体进行了定性研究。Fluent用于预测阀盘位置30、45和60度（其中0度是完全关闭位置）以及压力比范围内的阀盘表面压力分布。压力比的选择是为了确定计算流体动力学准确预测流场的能力，以及从几乎不可压缩到高度可压缩的流动中产生的扭矩。对轮盘上压力分布的Fluent预测与试验数据进行了比较，以便能够可靠地确定升力和阻力以及气动扭矩。记录了可接受的比较。
The ability to accurately predict the aerodynamic torque and lift and drag forces on a 2-D model of a 0.18 aspect ratio biconvex circular-arc disk operating in a compressible flow using computational fluid dynamics (CFD) was investigated. Fluent 6.0 was the CFD package utilized to perform these calculations. Grid-convergence and time-convergence/stability were analyzed first, followed by a qualitative study of the Spalart-Allmaras, k-e, and k-ω turbulence models with their enhancement features and model variants. Fluent was used to predict the pressure profile on the disk surface for disk positions 30, 45, and 60 deg (where 0 deg is the fully closed position) and over a range of pressure ratios. The pressure ratios were selected to determine the capability of CFD to accurately predict the flow field and resulting torque in flows ranging from nearly incompressible to highly compressible. Fluent predictions for the pressure profiles on the disk were compared to test data so that the lift and drag forces and aerodynamic torque could be determined responsibly. Acceptable comparisons were noted.