中文摘要：

对已有传统螺旋桨进行改型设计得到Kappel桨.在空泡水筒中对设计的Kappel桨与传统螺旋桨进行对比试验,试验中测试了两者的敞水性能、空泡性能以及脉动压力.试验结果表明：Kappel桨的梢端弯折结构能够抑制梢部绕流;在设计点Kappel桨敞水效率比传统螺旋桨高1.44%左右.在空泡不剧烈的情况下,Kappel桨的一阶和二阶脉动压力幅值比传统螺旋桨要小.试验中的Kappel桨梢端弯折部分较早出现了局部小片状空泡,但随着空泡变强,由于受到弯折部分的阻隔,并未沿着导边发展,而是沿桨叶弦向泄出.为了提高Kappel桨的空化性能,要尽量减小梢部弯折部分叶剖面与来流作用的攻角.

英文摘要：

Kappel propeller was designed by modifying a conventional propeller.Then a model test for Kappel and conventional propeller performance study was performed in cavitation tunnel.The open water performance,cavitation performance and pressure fluctuations of Kappel propeller and conventional propeller was compared.Experimental results show that the cross flow of Kappel propeller is constrained by curved tip;and the efficiency of Kappel propeller is 1.44% more than conventional propeller.The first and second harmonic orders pressure fluctuations of Kappel propeller are small when the cavitation is not drastic.For Kappel propeller,sheet cavity arises earlier at the curved leading edge,but it is not developed along propeller leading edge due to the blocking of curved tip.The experimental results also indicate that in order to design a Kappel propeller of good performance in cavitation,the attack angle of blade section in curved tip should be in a small level.