基于FLUENT CFD的椭圆形水下滑翔器伯努利方程验证

Bernoulli Verification of Elliptic Underwater Glider Based on FLUENT CFD

利用软件FLUENT CFD对某椭圆形滑翔器不同来流速度进行数值模拟,并且运用流体力学中的伯努利方程对椭圆形浮标周围物理场进行验证。结果表明,椭圆形水下滑翔器周围流场中,在同一条流线上各点的单位重量流体所具有的总机械能近似相等,即一条流线上不同点的动能、压力能、位置势能之和是一个定值,并且误差不超过3%,从而验证了伯努利方程在全流场流线的任何一点上均成立。通过数值模拟验证伯努利方程,可知椭圆形水下滑翔器满足一般的水动力性能要求。

The numerical simulation is carried out to elliptic underwater glider in different flow velocity by CFD FLUENT. The Bernoulli equation in fluid mechanics is used to verify the physical field around the elliptical buoy. It can be concluded that, at the same streamline, unit weight of the fluid, the total mechanical energy is approximately equal. The sum of ki- netic energy, stress energy, location potential energy is a constant value at the same stream- line of different points, and the error is less than 3%. As a result, Bernoulli equation is estab- lished at any point of the whole flow field. Therefore, elliptic underwater gliders are satisfied to ordinary hydrodynamic performance.