基于CFD的两栖式清淤机器人水动力特性研究

Research on hydrodynamic characteristics of amphibious desilting robot based on CFD

针对某两栖式清淤机器人,基于计算流体力学(computationalfluid dynamics,CFD)分析其静浮态和航行阻力。采用重叠网格方法计算静浮态下的吃水深度和纵倾角;分别采用静态网格方法和重叠网格方法预测两栖式清淤机器人静水直航工况的航行阻力,并对这两种方法进行对比。研究结果表明:采用重叠网格的方法可以有效计算两栖式清淤机器人静浮态下的吃水深度和纵倾角;静态网格方法和重叠网格方法均能有效预测两栖式清淤机器人水上航行阻力,静态网格方法计算效率高,但仅适用于航速较低的工况,而重叠网格方法适用于不同航速下的航行阻力预测,但计算效率较低。研究结果对两栖式清淤机器人的设计及改进有较大参考价值。

Based on computational fluid dynamics(CFD),the floating state and sailing resistance of amphibious desilting robot were analyzed.The draft depth and pitch angle were obtained by calculating the floating state with the overlapping mesh method.The static mesh method and overlapping mesh method were used to predict the sailing resistance of amphibious desilting robot and the two methods were compared.The results show that the draft depth and pitch angle of the amphibious desilting robot can be calculated effectively by using the overlapping mesh method.Both the static grid method and the overlapping mesh method can predict the sailing resistance of amphibious desilting robot.The static mesh method has high efficiency,but can only apply to the situation of the low sailing speed.While the overlapping mesh method is suitable for sailing resistance prediction under different sailing speed,it has low efficiency.The results are of great reference value to the design and improvement of amphibious desilting robot.