摘要
为了提高某摩托艇用喷水推进器的推进性能,文中对其流道和导叶进行了优化,运用CFD方法对改进的效果进行分析.以某混流泵为例,对其轴功率进行了CFD计算,不同转速时CFD计算误差在1%以内.进而运用CFD方法分析了某摩托艇用SHS1100喷水推进器的水力性能,发现其流道和第二级导叶内存在漩涡、喷口出流存在较大的旋转能量.从减小流道过流面积,以及流道背部曲率、改变第二级导叶形状等方面对其进行了优化.使喷水推进器的推力效率提高了7%,流道效率提高了5.7%,喷泵效率提高了3.3%,第二级导叶出流不均匀度降低了7.3%、出流周向动能降低了17%,并消除了流道和第二级导叶内的涡流.
In order to improve hydraulic performance of a marine waterjet,this paper optimized its inlet duct and second stator,and analyzed its performance by CFD.The power of a mixed-flow pump was calculated by CFD method,the error is less than 1%.This paper also analyzed the performance of a motor boat＇s SHS1100 waterjet by CFD,the results showed that it had turbulence in the inlet duct and second stator and had large amount of circumfluent energy in the outflow.The paper reduced the cross area and curvature of the inlet duct and redesigned the pump＇s second stator.Finally,the propulsion efficiency improved by 7%,inlet duct efficiency improved by 5.7%,pump efficiency improved by 3.3%,no-uniformity of nozzle outlet reduced by 7.3%,circumfluent energy of pump outlet reduced by 17%,and turbulence in the inlet duct and pump＇s second stator had disappeared.
出处
《武汉理工大学学报（交通科学与工程版）》
2015年第1期211-215,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
海军"十二五"预研项目资助
