水下悬浮隧道管段结构流阻特性分析

Flow Resistance Analysis of Submerged Floating Tunnel

为探讨结构断面形状对悬浮隧道管段表面压力分布的影响,采用ANSYS流体模块RNG(renormalizationgroup)k-ε湍流模型,对圆形、多边形、曲边形和椭圆形4种断面的悬浮隧道管段海水绕流场进行了数值模拟,分析了绕流场及管段表面的压力分布特点.结果表明,同种断面悬浮隧道管段表面的压力分布规律相同,压力值随来流速度变化明显;管段曲率是影响绕流场的重要参数,海流在流线形断面上分离晚,表面压力下降较慢,降低了管段上的海流阻力.

submerged In order to explore the effects of section shape on pressure distribution, flow floating tunnel for four types of cross section was simulated numerically renormalization group k-e turbulence model of ANSYS program. Flow field and pressure field around a by using the distribution on the surface of a submerged floating tunnel were analyzed. The results indicate that dynamical pressure has an identical distribution to the same cross section and varies obviously with change in the velocity of ocean stream. Curvature of a submerged floating tunnel is one important parameter influencing the flow field. Ocean stream is separated lately on the surface of a submerged floating tunnel with a streamlined cross section and dynamical pressure on the surface reduces slowly so as to decrease drag force on the surface of submerged floating tunnels with a streamlined cross section.