【作者】 徐佩； 王超； 郭春雨； 汪春辉；

【Author】 XU Pei;WANG Chao;GUO Chun-yu;WANG Chun-hui;College of Shipbuilding Engineering, Harbin Engineering University;

【机构】 哈尔滨工程大学船舶工程学院；

【摘要】 碎冰的存在导致螺旋桨周围流场不均匀,加剧了螺旋桨空泡的产生和诱导激振力的增加,将引起严重的桨叶剥蚀损伤以及轴系和船体振动等问题。针对极地船舶在冰区航行过程中冰桨非接触工况下螺旋桨性能,本文在大型循环水槽内搭建了冰阻塞条件下螺旋桨诱导激振力试验测试平台,研制了螺旋桨和单片桨叶载荷测力装置,测量和观察了常压和减压状态下不同冰桨轴向间距、空泡数时单片桨叶水动力载荷和螺旋桨诱导的脉动压力。试验结果表明:随着冰桨轴向间距和空泡数的减小,桨叶载荷波动范围越大;空泡数减小导致螺旋桨推力系数和桨叶轴承力频域曲线中出现宽带谱特性;冰桨轴向间距越小,螺旋桨轴承力叶频幅值、单片桨叶轴承力轴频幅值以及螺旋桨诱导的脉动压力叶频幅值越大;与常压状态相比,空泡数减小导致螺旋桨诱导的脉动压力高阶频率的脉动幅值急剧增加。更多还原

【Abstract】 The existence of broken ice leads to the uneven flow field around the propeller, which aggravates the generation of cavitation and the increase of induced exciting force, and will cause serious blade erosion damage and shafting and hull vibration. Aiming at the propeller performance of polar ship sailing in ice area under non-contact condition of ice-propeller,the test platform of propeller induced exciting force under ice blockage condition is built in a large circulating water channel,and the load measuring device of propeller and single blade is developed. The hydrodynamic load of single blade, propeller induced fluctuating pressure were measured and observed under atmospheric pressure and decompression conditions with different axial distances between the propeller and ice and cavitation numbers. The experimental1 results show that the fluctuation range of blade load increases with the decrease of axial spacing between the ice and propeller and cavitation number.The decrease of cavitation number leads to the appearance of broadband characteristics in the frequency domain curves of propeller thrust coefficient and blade bearing force. The smaller the axial distance between the propeller and ice, the larger the blade passing frequency(BPF) amplitude of the propeller bearing force, the axis passing frequency amplitude(APF) of the single blade bearing force and the blade passing frequency(BPF) amplitude of the propeller induced fluctuating pressure. The decrease in cavitation number leads to a sharp increase in the amplitude of the high-order frequency of the propeller-induced fluctuating pressure.更多还原