排灌机械工程学报Issue(11)：931-936,6.DOI:10.3969/j.issn.1674-8530.14.0039
基于CFD的对旋轴流式喷水推进泵转速控制方法
CFD-based rotational speed control method for contra-rotating axial-flow waterjet pump
摘要
Abstract
To study the performance of two-stage contra-rotating axial waterjet propulsion pump under different rotational speed ratios,the fluid flows in a waterjet pump are simulated under different wor-king conditions by using computational fluid dynamics(CFD)method,and the relationship between the performance and speed ratio is established,further the flow structure and turbulent energy dissipa-tion rate are analyzed.The results show that the performance of the pump depends largely on rotational speed ratio.Through comparison,the optimum speed ratio for the best efficiency is obtained at diffe-rent flow rates.When a flow rate is less than 1.0Qd,the optimum speed ratio can be realized by con-trolling the front impeller speed.When a flow rate is higher than 1.0Qd,however,the optimum speed ratio can be achieved by altering the rear impeller speed.Through an analysis of the velocity triangle and internal flow field at 0.9Qd,it is identified that the reduction of the front impeller speed is helpful to low angle of attack experienced by the front impeller,causing improved internal flow field and de-creased hydraulic losses.These results confirm the method of speed control for the contra-rotating a-xial-flow waterjet pump is feasible.关键词
轴流泵/喷水推进/双级对旋/转速控制Key words
axial pump/waterjets/contra-rotating/rotational speed control分类
农业科技引用本文复制引用
申占浩,潘中永,李红,潘希伟,黄振杰..基于CFD的对旋轴流式喷水推进泵转速控制方法[J].排灌机械工程学报,2014,(11):931-936,6.基金项目
“十二五”国家科技支撑计划项目（2011BAF14B02）；国家自然科学基金重点资助项目 （）
