应用面无法对淹没水射流锥形喷嘴流动特性进行了简要的计算，并结合试验结果作了分析与比较，指出分析不同结构喷嘴内部及射流区域内的压力系数分布，可以得出喷嘴的收缩角。及圆柱段L与喷嘴冲蚀性能之间的关系，为对喷嘴的进一步研究提供了理论指导． The application surface can not calculate the flow characteristics of the submerged nozzle. The analysis and comparison are made based on the experimental results. It is pointed out that the distribution of the pressure coefficient in the nozzle and the jet nozzle with different structures can be obtained. . And the relationship between the cylindrical section L and nozzle erosion performance, which provides theoretical guidance for the further study of the nozzle.