| Reaction thrust characteristics of high-pressure submerged water jet of cylinder nozzles |
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| 作者姓名： | LI Xiao-hui ZHU Yu-quan HUANG Guo-qin NIE Song-lin |
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| 作者单位： | School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
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| 基金项目： | 国家自然科学基金，国家高技术研究发展计划(863计划)，State Education Ministry |
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| 摘 要： | The shapes and geometrical parameters of nozzles are key factors for fluidics. The relationship among the reaction thrust, flow rate pressure, diameter do and length L of a cylinder nozzle is analyzed theoretically. The simulation of the flow field characteristics was conducted via the FLUENT computational fluid dynamics package. Effects of the inlet conditions and the nozzle dimensions on the reaction thrust of a water jet were addressed particularly. The reaction thrust experiments were performed on a custom-designed test apparatus. The experimental results reveal that a） the nozzle diameter and the inlet conditions exert great influence on the water jet reaction thrust; and b） for L≤4d0, where the nozzle is treated as a thin plate-orifice, the reaction thrust is independent of nozzle length; for L〉4d0, where the nozzle is treated as a long orifice, the reaction thrust can reach maximum under the condition of a certain flow rate. These findings lay a theoretical foundation for the design of nozzles and have significant value, especially for the future development of high-oressure water-let orooulsion technology.
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| 关 键 词： | 射流喷嘴 大推力 水射流 反应 计算流体动力学 气缸 淹没 高压 |
Reaction thrust characteristics of high-pressure submerged water jet of cylinder nozzles |
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| LI Xiao-hui,ZHU Yu-quan,HUANG Guo-qin,NIE Song-lin.Reaction thrust characteristics of high-pressure submerged water jet of cylinder nozzles[J].Journal of Chongqing University,2009,8(1):63-69. |
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| Authors: | LI Xiao-hui ZHU Yu-quan HUANG Guo-qin and NIE Song-lin |
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| Institution: | School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China |
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| Abstract: | The shapes and geometrical parameters of nozzles are key factors for fluidics. The relationship among the reaction thrust, flow rate pressure, diameter do and length L of a cylinder nozzle is analyzed theoretically. The simulation of the flow field characteristics was conducted via the FLUENT computational fuid dynamics package. Effects of the inlet conditions and the nozzle dimensions on the reaction thrust of a water jet were addressed particularly. The reaction thrust experiments were performed on a cnstom-designed test apparatus. The experimental results reveal that a) the nozzle diameter and the inlet conditions exert great influence on the water jet reaction thrust; and b) for L≤4d0, where the nozzle is treated as a thin plate-orifice, the reaction thrust is independent of nozzle length; for L4d0, where the nozzle is treated as a long orifice, the reaction thrast can reach maximum under the condition of a certain flow rate. These findings lay a theoretical foundation for the design of nozzles and have significant value, especially for the future development of high-pressure water-jet propulsion technology. |
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| Keywords: | cylindrical nozzle pressure distribution reaction thrust characteristics turbulent flow water jet |
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