定常流作用于波浪形边界附近的圆柱上的水动力

本文介绍在水洞中做的作用于波浪形边界附近的水动力特性的实验研究。在基于圆柱模型直径的 R_c=10~4～1.9×10~4 范围内,测量了圆柱在波谷、波峰和不同距离上的阻力、升力脉动变化的频率。流谱显示实验揭示了尾流结构随距离-直径比 G/D 的变化情况及圆柱与边界相互作用的机制。

HYDRODYNAMIC FORCES ACTING ON A CIRCULAR CYLINDER NEAR A WAVY BOUNDARY IN STEADY FLOW

The characteristics of drag and lift forces on a circular cylinder model near a wavy boundary have been experimentally investigated in a water tunnel, tn the range of the Reynolds numbers, based on the diameter of cylinder model, from 104 to 1.9104, the drag, lift force on the cylinder and lift force frequencies have been measured at the wave crest and trough and various distances from the wavy boundary. Flow visualization experiments revealed the wake structure varying with the gap-to-diameter ratio (G/D) and mechanism of interaction between the cylinder and the boundary.The characteristics of drag and lift forces on a circular cylinder model near a wavy boundary have been experimentally investigated in a water tunnel, tn the range of the Reynolds numbers, based on the diameter of cylinder model, from 104 to 1.9104, the drag, lift force on the cylinder and lift force frequencies have been measured at the wave crest and trough and various distances from the wavy boundary. Flow visualization experiments revealed the wake structure varying with the gap-to-diameter ratio (G/D) and mechanism of interaction between the cylinder and the boundary.