设为首页收藏本站

科技论坛

 找回密码
 注册
查看: 2549|回复: 0

[下载] 潜艇减阻技术

[复制链接]
发表于 2011-7-1 03:47:22 | 显示全部楼层 |阅读模式
Drag Reduction Technologies
V.-T. Truong
Maritime Platforms Division
Aeronautical and Maritime Research Laboratory
DSTO-GD-0290
ABSTRACT
Diluted polymer solutions, surfactants, microbubbles and compliant coating as drag
reducers have been reviewed in this report. The advantages and disadvantages of each
method have been discussed. For the polymer solutions, it is possible to achieve up to
80 % drag reduction with only a few parts per million of polymer. Ionic and non-ionic
surfactants can also offer similar drag reduction as polymer solutions but at a high
concentration of few percent. Microbubbles are perhaps the cheapest and non-polluted
drag reducer. However, the control of the bubble size and the angle of ejection can
impose technical challenges. This method can be combined with other drag reduction
(DR) technologies such as polymers to enhance its effectiveness. Compliant coatings
can be designed to behave in a similar fashion to the skin of a dolphin. The
development of the compliant coating is theoretically complicated, although the
optimized coating can offer a DR up to 50 %. Despite the extensive research in the area
of DR over the past four decades, for each DR technology there is no universally
accepted model that explains the DR mechanism. Application of DR technology with
microbubbles to the ship hull indicated a 10 – 15 % reduction in drag. The full scale
testing of a submarine by the US Navy has shown that polymer ejection has the
potential to reduce the self-noise, drag and radiated noise generated by the propellor.


  潜艇减阻技术.pdf (0.41MB)
您需要登录后才可以回帖 登录 | 注册

本版积分规则

辽公网安备 21100402204006号|科技论坛 ( 辽ICP备07501385号-1   

GMT+8, 2018-12-10 08:18

Powered by tech-domain X3.4 Licensed

© 2001-2017 Comsenz Inc.

快速回复 返回顶部 返回列表