基于动网格与滑移网格混合技术的导管螺旋桨推力研究

摘要

Using CFD methods, based on hybrid technique of dynamic mesh and sliding mesh, mesh renewal method for spring smoothing and local mesh reconstruction, solve the N-S equation in the watershed where the propeller is located. Research the thrust characteristics and the hydrodynamic phenomena of the ducted propeller under different modes of motion. Comparison of numerical simulation results and experimental results shows that,it is feasible to study the thrust characteristics of the ducted propeller by using the dynamic grid and the sliding mesh hybrid technique. In different modes of motion, the propeller disk surface feel the water flow rate is different, resulting in the propeller produced different axial induction velocity, making the ducted propeller issued different thrust. The greater the water velocity, the smaller the axial induction speed of the propeller, the smaller the thrust. On the contrary, the greater.%基于动网格与滑移网格混合技术,采用弹簧光顺与局部网格重构的网格更新方式,基于计算流体力学方法,求解导管螺旋桨流域内的N-S方程,研究不同运动方式下导管螺旋桨推力特性及水动力现象.数值模拟结果和实验结果的比较表明:利用动网格与滑移网格混合技术进行导管螺旋桨推力特性研究方法可行.导管螺旋桨在不同的运动形式下,螺旋桨盘面所感受到的水流进速不同,造成螺旋桨所产生的轴向诱导速度不同,使得导管螺旋桨发出不同的推力.水流进速越大,螺旋桨产生的轴向诱导速度越小,则推力越小;反之,则越大.