【摘要】 平进口喷水推进器的进口流道背部流动分离所导致的喷水推进泵进流畸变，是喷水推进泵性能与推进器性能下降的主要原因。基于涡流发生器（vortex generator, VG）/射流式涡旋发生器（vortex generator jet, VGJ）抑制流动分离的理论，该文选择某型进口流道模型，在低速风洞上进行模型吹风实验，以模拟平进口进水流道内流动。通过测量进口流道壁面压力和喷水推进泵入口面总压分布，解释了VG/VGJ提升推进性能的机理，获得了VG/VGJ结构尺寸和安装位置对流动控制效果的影响规律。在低进速比（IVR=0.5）工况下，布置合理的VG/VGJ能提高进口流道总压恢复系数和喷水推进泵进流面轴向速度均匀度，可以增加近5%的推力。更多还原

【Abstract】 The decreased performance of the waterjet pump and the thruster is mainly caused by the inlet flow distortion of the waterjet pump due to the flow separation at the back of the inlet duct of the flush-type waterjet.A typical flush-type intake duct is selected for a waterjet based on the theory of suppressing the possible flow separation by using the vortex generator/vortex generator jet(VG/VGJ). The flow in the flush-type intake duct of the waterjet is then simulated by the blowing model test in the low-speed wind tunnel. The distributions of the static pressure on the wall of the inlet duct and the total pressure on the surface of the waterjet pump inlet were measured to explain the mechanism of promoting the propulsion performance by the VG/VGJ, obtaining the influence of the structural dimension and installation locations of the VG/VGJ on the flow control. At a low advance ratio(IVR=0.5), the properly installed VG/VGJ can improve the total pressure recovery coefficient of the inlet duct and the uniformity of the axial velocity of the waterjet pump inlet surface, resulting in an increase of thrust about 5%.更多还原