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本文讨论了波浪与稳定流相互作用的二元流条件下的流速场问题。分析表明由于波浪与水流相互作用的结果水流的垂线流速分布变得更为均匀,这一结果已经实验验证。结果还表明对于波流共同作用下的水平流速场可以应用波浪与水流二者水平流速值的叠加原理。数值计算的结果表明,对于波面高程和水平流速值,由非线性波理论所得的结果较线性波理论的结果为好。作者认为,在波流共同作用条件下,在工程实用上为了计算水平流速场,当相对水深 d/L+2大于0.1时,司采用斯托克斯三阶波或五阶波理论,当相对水深 d/L_2小于0.1时,司采用椭圆余弦波理论(d 为水深,L_2为静水中的波长)。
In this paper, we discuss the flow field problem under the condition of binary flow with the interaction between wave and steady flow. The analysis shows that the vertical flow velocity distribution becomes more uniform as a result of the wave interaction with the water flow. This result has been experimentally verified. The results also show that the principle of superposition of the horizontal velocity values of wave and water flow can be applied to the horizontal velocity field under the interaction of wave flow. The numerical results show that the results obtained from the nonlinear wave theory are better than those from the linear wave theory for wave height and horizontal velocity. The authors consider that Stokes’ third-order or fifth-order wave theory should be used when relative water depth d / L + 2 is greater than 0.1 in order to calculate the horizontal velocity field in practical engineering. When the relative When the water depth d / L_2 is less than 0.1, the division adopts the elliptic cosine wave theory (d is the depth of water and L_2 is the wavelength in still water).