切割桨叶随边以适应船-机-桨的匹配

Trailing Edge Incision to Improve the Match between Power and Revolutions

船机桨匹配的优劣直接影响船舶的正常运行.对试航后负荷偏重的桨叶可采用切割随边的方法来减轻负荷,从而达到较好的匹配.文中对具有NACA-66mod.,a=0.8剖面的两只桨模(A,B)进行了3%、5%、7%随边切割后的计算和敞水试验,得出随边切割引起的螺距及拱度的变化。

A harmonic match between power and revolutions is important to any vessel. It is known that some shortening of blade trailing edge can reduce propeller loading. In this paper, the trailing edge of two propeller models (A,B) with sections of NACA 66 mod. a =0.8 were cut off by 3%,5%,7% of the chord length. Then the variances of pitch and camber were calculated and open water tests were carried out. According to the results of full scale trials a simple method of incision was offered to improve the match between power and revolutions.