基于蛇怪蜥蜴踩水机理的仿生推进装置数值计算方法研究

为突破传统排水型两栖车辆“阻力墙”现象，提高两栖车辆水上航速，从蛇怪蜥蜴高速踏水机理出发，设计一种新型轮一叶复合式水上仿生推进装置，采用滑移网格和动网格方法对不同转速下的推进装置三维模型的动力学特性进行数值计算，并对仿真结果进行对比和分析．结果表明：滑移网格和动网格方法在计算结果上获得比较一致的结果，动网格方法更能反映模型的真实运动情况，而滑移网格方法在计算过程中表现出较好的稳定性，同时显著减少计算时间

Research on the Method of Numerical Calculation for Propulsion Unit Based on the Mechanism of the Basilisk Lizard Running on the Water

In order to breach the ＂resistance wall＂encountered by traditional amphibious vehicle and en- hance the speed of the amphibious vehicle, we simulated the movements of a basilisk lizard running on the water to develop a wheel-blade compound propulsion unit. Comparison and analysis of the results ob- tained by using a three-dimensional computational fluid sliding mesh and dynamics method for propulsion unit model are presented and analyzed. Combined with the result of simulation analysis, it indicates that the result of sliding mesh is identical with the result of dynamic mesh methods, but sliding mesh is able to ensure numerical calculation stability and rapidity.