中文摘要：

在导管首端设置正弦脉冲流发生器，下游某处设置空气室，精心构建系统条件造成水力共振，使喷嘴处脉冲射流的压力振幅大大提高。系统的数学物理模型用水力瞬变特征线有限差分方程建立，变时步方法解算。最优水力共振条件用Matlab直接搜索算法搜寻。正弦脉冲流发生器由恒流泵和正弦容积变化活塞缸构成，电动活塞泵用凸轮传动给出恒定流量，活塞缸活塞用凸轮或曲轴连杆传动使缸容正弦变化。

英文摘要：

By setting a sinusoidal pulsed flow generator and an air chamber at the head and midst of conduit respectively,and elaborately structuring conditions of water jet system, a strong hydraulic resonance can be induced and pressure amplitude at nozzle can be greatly promoted. The mathematical-physical model of the system is illuminated with characteristics finite difference equations of hydraulic transient and solved by variable time step method. The conditions of desirable resonance are searched by direct search algorithm of Matlab. The sinusoidal pulsed flow generator is composed of a constant discharge pump and a piston cylinder fluctuating sinusoidally in volume. The constant discharge is provided by an electric piston pump driven by cam mechanism, and the sinusoidal volume fluctuation of the cylinder is produced by motion of piston driven by cam or crankshaft mechanism.