摘要
通过试验，研究了不同喷孔孔径、不同缝喷角、不同喷气面积以及横向断阶对光滑平板局部摩擦阻力的影响。结果表明：无论是孔喷还是缝喷，在速度为2m／s～6m／s，喷气板后相当长的范围内的局部摩擦阻力可减少50％～90％；孔径及喷气面积变化对减阻效果的影响不大；断阶使气幕减阻的效果增大；气幕减阻的机理在于喷气时，在平板和水之间形成了气液混合流空穴。
The effect on the local frictional resistance of smooth flat plate by several variation of pore size, air injection angle and porous surface area as well as transverse step, is investigated experimentally in this paper. The experimental results show that local firctional resistance of downstream plate of injection region is reduced at extent ranging between 50%and 90%, by injection air through pore or slot, with free stream velocities between 2 and 6m/s. The pore size and area of air injection surface have small effect on resistance reduction and the step makes resistance reduce largely. The mechanism of resistance reduction is due to the formation of air cavity, mixed with air and water, between the flat plate and water.
出处
《中国造船》
EI
CSCD
北大核心
1998年第A10期100-106,共7页
Shipbuilding of China
关键词
摩擦阻力
平板
减阻
船舶
Frictional resistance, Flat plate, Resistance reduction
