Research on Reaction Thrust Characteristics of Cylinder Nozzle for Submerged Water Jet
The shape and geometrical parameters of nozzle are key factors for the fluidics. Theoretical analyses and experimental investigations are accomplished on the relationship between the reaction thrust and flowrate or pressure, as well as diameter d and length L of cylinder nozzle in this research, respectively. The reaction thrust characteristics of submerged water jet for cylindrical nozzles with different lengths are investigated. A simulation study on the reaction thrust is conducted through the CFD package FLUENT. Effects of the inlet conditions as well as the nozzle dimensions on the reaction thrust of water jet are addressed particularly. The experiments are performed on a self-designed test apparatus. The experimental results reveal that (a) the nozzle diameter and the inlet conditions exert great influence on the reaction thrust of water jet; (b) for L ≤4d, the nozzle is treated as thin plate-orifice, the reaction thrust is independent of the length of nozzle, on the other hand, for L ＞ Ad, the nozzle is treated as long orifice, the reaction thrust can reach maximum under condition of the certain flowrate. Those will lay a theoretical foundation for the design of nozzle and has significant value especially for the development of high-pressure water-jet propulsion technology in the future.
Cylindrical nozzle long orifice pressure distribution reaction thrust characteristics turbulent flow water jet
Li Xiaohui Zhu Yuquan Nie Songlin Yang Yousheng Zhang Jun
School of Mechanical Science and Engineering, Huazhong University of Science and Technology Wuhan, Hubei, 430074, China
国际会议
北戴河
英文
30-33
2007-06-06（万方平台首次上网日期，不代表论文的发表时间）