某船用螺旋桨空泡诱导下的脉动压力试验方法

Test Method of Fluctuation Pressure Induced by Ship Propeller Cavitation

文章分析了由螺旋桨空泡诱导的脉动压力对船体振动的影响及计算方法。为了进一步研究螺旋桨空泡对脉动压力的贡献量,以某船用螺旋桨为对象,分别进行了设计和压载工况下的空泡及无空化时的脉动压力试验。试验结果表明,在相应的测量点处,无空泡下时的对应阶次脉动压力值都低于发生空泡下的值,尽量减小或避免空泡的发生,将可有效减小螺旋桨诱导的脉动压力值,从而减缓船体的振动。

The papaer analyzesthe influence of the fluctuation pressurelnduced by propeller cavitation on the hull vibration and the calculation method.Taking a ship propeller as the object,the paper carries out the fluctuation pressure test of cavitation and no-cavitation at the design and ballast conditions to research the contribution of cavitation for fluctuation pressure.The results show that the fluctuation pressure value at no-cavitation is lower than the value at cavitaton in the same measurement point.Reducing and avoiding the occurrence of the cavitaion will effectively decrease the fluctuation pressure and the hull vibration.