刘 健1，黄洪亮1，陈 勇2，吴昔磊2，吴 越1，陈 帅1，饶 欣1，李灵智1
（1 中国水产科学研究院东海水产研究所， 农业部东海与远洋渔业资源开发利用重点实验室，
中国水产科学研究院海洋捕捞工程技术研究中心, 上海 200090；
2 上海开创远洋渔业有限公司, 上海 200082）

摘要：为提高南极磷虾单船拖网低拖速作业时的网具扩张性能，针对一种立式曲面中空式拖网网板，利用水槽模型实验测得不同迎流冲角状态下的升力系数（CL）、阻力系数（CD）和升阻比（K）。结果表明，CL和K值随冲角的增大呈先升后降趋势，CD随冲角的增大呈上升趋势；升力系数最大值CLmax=1.436（冲角α=30°），此时CD=0.649，K=2.213，升阻比最大值Kmax=4.671（α=10°），此时CL=0.981，CD=0.210；工作冲角范围为10°~30°时，南极磷虾拖网网板升力系数CL>0.98且升阻比K>2.21。比较不同类型网板的水动力性能，南极磷虾拖网网板具有阻力系数较低、升阻比较高的优点，可为进一步优化南极磷虾拖网网板性能提供参考依据。

关键词：南极磷虾拖网；网板；水动力性能；模型试验

Analysis on the hydrodynamic characteristics of Antarctic krill trawl otter board
LIU Jian1, HUANG Hongliang1, CHEN Yong2, WU Xilei2, WU Yue1, CHEN Shuai1, RAO Xin1, LI Lingzhi1
(1 Engineering Technology Research Center of Marine Fishing, Chinese Academy of Fishery Sciences，
Key Laboratory of East China Sea and Oceanic Fishery Resources Exploitation, Ministry of Agriculture，
East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China;
2 Shanghai Kaichuang Deepsea Fisheries Co.,Ltd. Shanghai 200082, China)

Abstract: For improving the expansion performance of trawl net in low trawling speed and enhancing the Antarctic krill trawl productivity, a high aspect ratio otter board with hollow structure was developed. A flume model experiment was conducted to measure the lift coefficient (CL), drag coefficient (CD) and lift to drag ratio (K) in different angle of attack (α). The experimental results are as follows: The CL and K value show a trend of increasing at the beginning and then decreasing with the increase of angle of attack, CD value reflects an upward trend with the increase of angle of attack; when α=30°, the max lift coefficient (CLmax) is 1.436, in this case CD =0.649, K=2.213; When α=10°, the max lift to drag ratio (Kmax) is 4.671, in this case CL =0.981, CD =0.210. Suggest the best working scope of angle of attack is between 10°~30°, in which case, CL>0.98 and K>2.21. Through comparative analysis of the hydrodynamic performance of different types of otter boards, the Antarctic krill trawl otter board has advantages of lower drag coefficient and higher lift to drag ratio, which can provide a reference basis for further optimization of the Antarctic krill trawl otter board.

Key words: Antarctic krill trawl; otter board; hydrodynamic characteristics; model test