【作者】 王世晟； 孙铁志； 宗智； 张桂勇； 李海涛；

【Author】 WANG Shi-sheng;SUN Tie-zhi;ZONG Zhi;ZHANG Gui-yong;LI Hai-tao;School of Naval Architecture,Dalian University of Technology;State Key Laboratory of Structural Analysis for Industrial Equipment;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration;

【机构】 大连理工大学船舶工程学院； 大连理工大学工业装备与结构分析国家重点实验室； 高新船舶与深海开发装备协同创新中心；

【摘要】 为获得头部通气圆柱体垂直入水情况下的流场演变和载荷特性,本研究基于入水试验平台,采用内测和高速影像系统对其入水过程进行了试验研究,通过对流场变化和压力数据的研究,分析了不同通气率对入水空泡形态和砰击载荷以及表面压力的影响。结果表明:头部通气降低了入水砰击压力,延缓了压力峰值出现的时间,且通气率越高作用越明显,通气率的提高同时会改变入水空泡形态,使其更早发生表面闭合。而圆柱体表面压力主要与空泡形态有关,同一空泡类型下通气率对表面压力的影响不明显。更多还原

【Abstract】 In order to obtain the flow field evolution and load characteristics of the headventilated cylinder during vertical water-entry,based on the water-entry test platform,an internal test system and a high-speed imaging system were used to test this process.Through the study of flow field evolution and pressure data,the influence of different ventilation rates on the shape of cavitation,slamming load and surface pressure are analyzed.The results show that the head ventilation reduces the slamming pressure and delays the appearance of the pressure peak.The higher the ventilation rate,the more obvious the effect.The increase of the ventilation rate will also change the cavitation shape and make the surface closure occur earlier.The surface pressure of the cylinder is mainly related to the cavitation shape,and the ventilation rate has no obvious influence on the surface pressure under the same cavitation type.更多还原