摘要
采用数值计算方法研究了高速两栖车辆水上航行的阻力特性,得到了其粘性绕流场分布.数值计算结果和实验取得了较好的一致.结果表明,所采用车型适用于高航速状态,随着Fr数的增加,车体从排水型逐渐过渡到滑水型,阻力呈现先增大后减小的趋势.在Fr=1.65时,出现阻力峰值.在高速段,随着航行速度的增加,车体阻力降低,速度逐渐减小.
Resistance characteristics of a high-speed amphibious vehicle sailing on the water are investigated by means of commercial software CFX. Ambient field and drag around the vehicle are studied. The results of numerical simulation are consistent with those from experiment data, indicating that the adopted vehicle is suitable for sailing in high-speed. With the increase of Froude number, the sailing posture of the vehicle transforms from a displacement vessel to a hydroplaning one. The resistance acting on the vehicle increases first and then decreases, and its peak value appears when that Froude numberis equal tol. 65. During the high-speed period, the reducing rate of the body resistance becomes lower with the increase of the vehicle speed.
出处
《车辆与动力技术》
2013年第4期1-5,共5页
Vehicle & Power Technology
基金
国家自然基金重点项目(51239005)
关键词
高速两栖车辆
数值计算
阻力特性
High-speed amphibious vehicle
CFD
Resistance characteristics
