Trimming Sails during Leg of Starting Based on Numerical Simulation

The aerodynamic performance of the trimming sail by use of numerical simulation method was studied.The relationship between the sail aerodynamic coefficient and the angle of attack,different mast shapes,angle of the pitch with the direction of the athlete,angle of the pitch with the direction of the stern,different sail shapes was revealed.Based on the weight,height and physical fitness of the athlete,during the leg of the starting,if the athlete would want to go out of the sailing group,the angle of attack change,the mast shape,angle of the pitch with the di rection of the athlete,angle of the pitch with the direction of the stern,different sail shapes could be adjusted to the appropriate degree to have the sailboat fast when the sailboat could be balanced.When the sailboat begins in the race,it should keep from the competitor in the beneficial route if it would be ahead.The basic principles of trim ming sail were analyzed for guiding the players to know how to trim the sails during the leg of the starting in sailing competition.