帆型对帆船帆翼空气动力特性影响研究

Study on Influence of Different Wind Conditions on the Aerodynamic Performance of the Sails

为了比较帆船比赛中不同帆型时帆翼推进能力,利用数值模拟方法对同一面帆翼两种典型的帆型的帆翼空气动力进行了比较。研究发现:拱度较大的帆翼其升力系数较大,对于提高帆船速度有利,但是其压力中心增加,其倾斜力矩也增加了。综合考虑帆船整体行驶性能情况下,一般大风时使用拱度较小的帆翼,小风时使用拱度较大的帆翼。研究结果为运动员比赛操作帆船过程中根据不同风况进行有利航行的帆翼调整提供了科学依据,为双帆或多帆帆船前帆调整提供指导。

By comparing with the aerodynamic performance of aifferent sails,it＇s found that the lift coefficient would be bigger and the speed of the sailing would be enhanced,but the drag coefficient,pressure centre and moment of the sail would also enhance if the camber ratio of the sail was higher because the aspect ratio was basically the same.So,if the whole performance of the sail would be considered,the smaller camber ratio would be used in the strong wind and the bigger camber ration should be used in the light wind.The research could supervise the athletes to trim the sails based on the different wind conditions.