四面六边透水框架尾流场水力特性

Hydraulic Characteristics of Tetrahedron-like Penetrating Frame Wake

采用声学多普勒流速仪(ADV)自动测量分析系统,测量了水槽中四面六边透水框架和四面六边实体块尾流场的流速垂线分布和紊动量垂线分布,对比研究了两者的水流结构和防护机理。采用动量积分的方法,计算了四面六边透水框架绕流体的阻力,研究表明,在一定雷诺数范围内,四面六边透水框架的阻力大小开始随着雷诺数的增大而增大,当达到一个峰值后,又逐渐趋于一个常数值。

The flow structures around the tetrahedron-like penetrating frame and tetrahedron solid block were studied by using Acoustic-Doppler Velocimeter (ADV) for comparison purposes. The results indicate the velocity loss and turbulence intensity caused by tetrahedron solid block are larger than those caused by tetrahedron-like penetrating frame(TLPF) in the near field, and the former local erosion often happens around it. Contrarily, the variation in the velocity and the magnitude of turbulence intensity induced by tetrahedron