喷泵叶轮旋转方向对喷水推进性能的影响  

Effects of Rotor Rotation Direction on Waterjet Propulsion Performances

作　　者：易文彬[1] 王永生[1] 彭云龙[1] 刘承江[1] 李留洋[1] 

机构地区：[1]海军工程大学动力工程学院,武汉430033

出　　处：《上海交通大学学报》2016年第8期1207-1213,共7页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金项目(51209212)资助

摘　　要：采用雷诺数与弗劳德数全相似的方法预报了某双泵推进单体船喷水推进器外旋和内旋对推进和噪声性能的影响.以某混流式喷水推进器水动力性能为校验对象,验证了该数学模型和数值方法的可信性.比较了某航速下喷泵外旋及内旋时推进器推力、流量、轴功率、泵效率及推力效率的变化.叶轮旋向对推进器的流量及推力影响较大,对该航速下推力效率及泵效率影响较小.采用DES湍流模型进行了流场的瞬态计算,比较内旋及外旋泵在自航点内流场压力脉动的变化,外旋泵压力脉动的最大值大于内旋.根据瞬态计算结果进行了噪声的计算,结果表明,内旋喷泵的噪声小于外旋喷泵.The CFD method based on Reynolds and Froude similarity was adopted to predict the effects of rotor rotation direction on waterjet propulsion and acoustic performances.The hydrodynamic performance of a mixed-flow pump was predicted and compared in order to validate mathematic model and numerical simulation methods.The thrust,mass flow,shaft power,efficiency of the pump and propulsive efficiency with different rotation directions of the studied waterjet were compared.The rotation direction of the rotor had an effect on the mass flow and thrust,while it had little effect on the efficiency of the pump and propulsive efficiency.The DES turbulence model was adopted in transient calculation to compare pressure fluctuation.The maximum pressure fluctuation amplitude of the inward rotor was smaller than the outward rotor.The noise calculation based on the transient calculation shows that the noise of the inward rotor was also smaller than that of the outward rotor.The installation of waterjet with inward rotation is recommended.

关 键 词：喷水推进 计算流体力学 叶轮旋向 压力脉动 噪声 

分 类 号：U664.34[交通运输工程—船舶及航道工程]