Reaction thrust of water jet for conical nozzles  

作　　者：黄国勤 杨有胜 李晓晖 朱玉泉 

机构地区：[1]School of Mechanical Science and Engineering, Huazhong University of Science and Technology

出　　处：《Journal of Shanghai University(English Edition)》2009年第4期305-310,共6页上海大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.50375056);the National High-Technology Research and Development Program of China (Grant No.2006AA09Z238)

摘　　要：Clear knowledge on the reaction thrust of water jet is valuable for better design of water jet propulsion system. In this paper, theoretical, numerical and experimental studies were carried out to investigate the effects of the nozzle geometry as-well as the inlet conditions on the reaction thrust of water jet. Comparison analyses reveal that the reaction thrust has a direct proportional relationship with the product of the inlet pressure, the square of flow rate and two-thirds power exponent of the input power. The results also indicate that the diameter of the cylinder column for the conical nozzle has great influence on the reaction thrust characteristics. In addition, the best values of the half cone angle and the cylinder column length exist to make the reaction thrust reach its maximum under the same inlet conditions.Clear knowledge on the reaction thrust of water jet is valuable for better design of water jet propulsion system. In this paper, theoretical, numerical and experimental studies were carried out to investigate the effects of the nozzle geometry as-well as the inlet conditions on the reaction thrust of water jet. Comparison analyses reveal that the reaction thrust has a direct proportional relationship with the product of the inlet pressure, the square of flow rate and two-thirds power exponent of the input power. The results also indicate that the diameter of the cylinder column for the conical nozzle has great influence on the reaction thrust characteristics. In addition, the best values of the half cone angle and the cylinder column length exist to make the reaction thrust reach its maximum under the same inlet conditions.

关 键 词：conical nozzle reaction thrust thrust coefficient wate jet 

分 类 号：O358[理学—流体力学]