滑行艇喷溅阻力特性模型试验研究

Model test research on spray resistance characteristics of planing craft

通过开展棱柱型滑行艇喷溅阻力的模型试验研究，提出了一种滑行艇喷溅阻力的计算分析方法.试验选取4组不同初始纵倾角τ=1.5°，2.2°，3.0°，5.0°，每个纵倾角对应2个吃水，分别为：τ=1.5°时吃水dA =37.3，27.3 mm；τ=2.2°时dA =58.0，38.0 mm；τ=3.0°时dA =58.0，48.0 mm；τ=5.0°时dA =73.0，53.0 mm.每个吃水下的航速分别为1，2，3，4，5 m/s共计40种工况.通过在艇底布置压力传感器测量航行过程中受到的水动压力，同时采用高速摄像机拍摄的视频捕捉航行过程中的喷溅区域和滑行面，开展滑行面压力传感器数据的处理分析，确定了滑行艇滑行面的阻力特性，在此基础上采用间接法完成了滑行艇喷溅阻力的分析计算.结果表明：高速滑行状态下，滑行艇的喷溅阻力约占总阻力的22%-35%.

Model test research on spray resistance of prismatic planing craft is done to provide a method for calcu-lating spray resistance of planing craft. The trim angles are 1. 5 °,2. 2 °,3. 0 °and 5. 0 °,respectively. There are two tail draft for each angle which are 37. 3,27. 3 mm;58. 0,38. 0 mm;58. 0,48. 0 mm and 73. 0,53. 0 mm. And the planing speeds are 1,2,3,4 and 5 m/s,respectively. Totally there are 40 test cases with different trim an-gles,draft and speeds. The hydrodynamic pressure is measured by pressure sensors arranged at the bottom of the boat. The spray area and pressure area are captured by a high-speed camera during the planing process. The test data of pressure are analyzed to determine resistance characteristics of the pressure area. The indirect method is se-lected to calculate the spray resistance. The results show that the spray resistance accounts for 22% -35% of the total resistance in the high-speed planing condition.