海洋深水试验池造流系统中穿孔压力墙参数的研究

Research on parameters of perforated wall in current generation system of deepwater offshore basin

深水造流系统作为海洋深水试验池的主要设备,其造流效果的好坏直接决定了水池能否正确模拟深海海洋环境,进而开展海洋工程深水试验研究的能力。通过数值求解RANS方程和标准k-ε湍流模型,对深水池内整体流场的流速和压力分布等流场特性进行了研究。计算结果表明,布置在进水和出水廊道内的穿孔压力墙是深水造流系统中的关键整流设备,其孔径大小、墙的厚度以及穿孔墙的表面粗糙度等参数都会对水池内流场的均匀性,水流在水池内循环流动所受到的压力损失等流场特性产生显著影响。数值模拟的结果对于海洋深水试验池的设计和建造具有重要的参考价值。

As one of the main facilities of the deepwater offshore basin, the current generation system is of great importance for the correct modeling of ocean environment and the capability to conduct ocean engineering model test in deep water. By solving the Reynolds-Averaged Navier-Stokes （RANS） equations and the standard k-ε turbulence model numerically, the distributions of current velocities and pressures etc. in the basin are investigated. It is shown that the perforated wall in inflow and outflow culverts is the key component of the deepwater current generation system. In addition the perforated walls with differ ent parameters, such as diameters thickness, and roughness etc. have significant influences on the uniformity of the flow field in the basin and the pressure losses during the water flow recirculation. According to the results of numerical calculation, the design of the current generation system is modified and optimized.