0.05);(2)随着最大相对弯度的增加,C_(Lmax)呈上升趋势,α0呈先升后降趋势,K_(max)呈下降趋势。根据实验结果,给出了实际应用中双弧面网板最大相对弯度的设计建议。通过比较不同结构参数网板的水动力学性能,可为进一步优化设计拖网网板提供参考依据。
To study the effect of respect ratio and maximum relative camber on hydrodynamic performance of otter boards, a flume model experiment was conducted to measure the lift force(Fy) and drag resistance(Fx). The influence rule of main hydrodynamic performance parameter was analyzed, such as the drag coefficient(C_D), lift coefficient(C_L) and lift to drag ratio(K). The experimental results are as follows:(1) The maximum relative camber had extremely significant impacts on the C_(Lmax) and K_(max) value and significant impact on the α_0 value(0.01
0.05);(2) The C_(Lmax) shows an uptrend with the increase of the maximum relative camber. The α_0 value shows a trend of increasing at the beginning and then decreasing with the increase of the maximum relative camber. But the K_(max) value shows a downtrend with the increase of the maximum relative camber. Given the best suggestion of the maximum relative camber in the practical application for vertical double cambered otter board.Through comparative analysis of the hydrodynamic performance of different types of otter boards,the conclusion can provide a reference basis for further optimization of the Antarctic krill trawl otter board.