Experimental Study on Reaction Thrust Characteristics of Water Jet for Conical Nozzle  

作　　者：黄国勤 李晓辉 朱玉泉 聂松林 

机构地区：[1]State Key Laboratory of Mechanical Transmission,College of Mechanical Engineering,Chongqing University [2]School of Mechanical Science and Engineering,Huazhong University of Science and Technology [3]College of Mechanical Engineering and Applied Electronics Technology,Beijing University of Technology

出　　处：《China Ocean Engineering》2009年第4期669-678,共10页中国海洋工程（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.50775081);the National High Technology Research and Development Program of China(863 Program,Grant No.2006AA09Z238)

摘　　要：Water jet thruster, which is a marine system that creates a jet of water for propulsion, has several advantages such as low noise, good anti-cavitation characteristics and maneuvering characteristics. The reaction thrust characteristics of water jet for conical nozzles directly determine the speed of autonomous underwater vehicles （AUV）. Theoretical, numerical and experimental studies have been, carried out to investigate the effects of the nozzle geometries as well as inlet conditions on the reaction thrust of water jet in this paper. The experimental results show that： 1） the reaction thrust is proportional to inlet pressure, the square of flow rate and 2/3 power exponent of input power; 2） the diameter of cylinder column for conical nozzle has great influence on the reaction thrust characteristics; 3） the best values of the half cone angle and the cylinder column length exist to make the reaction thrust coefficient to reach the maximum under the same inlet conditions. Those provide a basis for nozzles design and have significant value, especially for developing high performance and efficiency water jet propulsion unit.Water jet thruster, which is a marine system that creates a jet of water for propulsion, has several advantages such as low noise, good anti-cavitation characteristics and maneuvering characteristics. The reaction thrust characteristics of water jet for conical nozzles directly determine the speed of autonomous underwater vehicles （AUV）. Theoretical, numerical and experimental studies have been, carried out to investigate the effects of the nozzle geometries as well as inlet conditions on the reaction thrust of water jet in this paper. The experimental results show that： 1） the reaction thrust is proportional to inlet pressure, the square of flow rate and 2/3 power exponent of input power; 2） the diameter of cylinder column for conical nozzle has great influence on the reaction thrust characteristics; 3） the best values of the half cone angle and the cylinder column length exist to make the reaction thrust coefficient to reach the maximum under the same inlet conditions. Those provide a basis for nozzles design and have significant value, especially for developing high performance and efficiency water jet propulsion unit.

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

分 类 号：P754[天文地球—海洋科学]