Hydrodynamic characteristics of knotted and knotless purse seine netting panels as determined in a flume tank.
Hydrodynamic characteristics of knotted and knotless purse seine netting panels as determined in a flume tank.
复制标题
DOI：
10.1371/journal.pone.0192206
复制
发表时间：
2018
期刊：
影响因子：
3.7
通讯作者：
Hu F
中科院分区：
文献类型：
--
作者：
Tang H;Xu L;Hu F
尼龙（PA）网由于其高强度和良好的沉没性能，被广泛用于围网和其他渔具。然而，人们对不同特性的尼龙网的水动力性能了解甚少。研究了不同攻角和流速下不同结型和固度比的尼龙网的水动力特性。结果表明，网板的水动力系数与雷诺数、固度比、攻角、结型和缠绕方式有关。结果表明，固度比与阻力系数呈正相关（CD90），而与气流平行（CD0）的固度比与阻力系数呈正相关。对于向气流倾斜的网板，在攻角为0°~ 50°时，斜阻系数与固度比呈负相关，在攻角为50°~ 90°时，斜阻系数与固度比呈正相关。升力系数随攻角增大而增大，在攻角为50°时达到最大值，随后下降。结果表明，结网产生的阻力占总阻力的15-25%，结网固度比越高，CD0越大，而无结网固度比越低。与无结聚乙烯（PE）网相比，在较高雷诺数（Re>2200）下，无结PA网的阻力系数占主导地位。
Nylon (PA) netting is widely used in purse seines and other fishing gears due to its high strength and good sinking performance. However, hydrodynamic properties of nylon netting of different characteristics are poorly understood. This study investigated hydrodynamic characteristics of nylon netting of different knot types and solidity ratios under different attack angles and flow velocities. It was found that the hydrodynamic coefficient of netting panels was related to Reynolds number, solidity ratio, attack angle, knot type and twine construction. The solidity ratio was found to positively correlate with drag coefficient when the netting was normal to the flow (CD90), but not the case when the netting was parallel to the flow (CD0). For netting panels inclined to the flow, the inclined drag coefficient had a negative relationship with the solidity ratio for attack angles between 0° and 50°, but a positive relationship for attack angles between 50° and 90°. The lift coefficient increased with the attack angle, reaching the culminating point at an attack angle of 50°, before subsequent decline. We found that the drag generated by knot accounted for 15–25% of total drag, and the knotted netting with higher solidity ratio exhibited a greater CD0, but it was not the case for the knotless netting. Compared to knotless polyethylene (PE) netting, the drag coefficients of knotless PA netting were dominant at higher Reynolds number (Re>2200).
登录
查看更多内容
影响因子：
4
作者：
Zhan, J. M.;Jia, X. P.;Hu, Y. Z.
通讯作者：
Hu, Y. Z.
影响因子：
1.9
作者：
Hosseini, Seyed Abbas;Lee, Chun-Woo;Lee, Gun-Ho
通讯作者：
Lee, Gun-Ho
影响因子：
2.4
作者：
Kim, Hyun-Young;Lee, Chun-Woo;Lee, Gun-Ho
通讯作者：
Lee, Gun-Ho
影响因子：
5
作者：
Tsukrov, Igor;Drach, Andrew;Celikkol, Barbaros
通讯作者：
Celikkol, Barbaros
影响因子：
5
作者：
Zhou, Cheng;Xu, Liuxiong;Qu, Xiaoyu
通讯作者：
Qu, Xiaoyu