摘要
以某高速艇喷泵为研究对象,运用CFD方法计算并分析喷泵敞水性能缺陷,针对缺陷进行三元改进设计。首先以国外某混流式喷水推进泵为例,用基于雷诺时均的数值计算方法对喷泵敞水性能进行模拟,各转速下喷泵功率计算误差在1.5%以内,验证了本文所用数值计算方法的可信性。然后对该高速艇喷泵敞水性能进行计算,利用CFX软件后处理分析出设计缺陷,对轴面线重新设计,将两级导叶改为一级导叶。并且,针对叶轮做功效率低和导叶整流效果差的问题,利用三元设计方法将叶片负载分布改为前重载型以此提高喷泵效率。最后计算改进后的喷泵效率提高了5%左右,表明了三元设计方法在喷泵改进设计上的实用性。
In order to check out the accuracy of 3D design method and bring it to optimize pump design, the study analyzes the design defects of on motorboat＇ water jet pump based on CFD and solves the problem via 3D design. Firstly, a foreign water jet pump（mixed-flow pump）＇s performance is simulated by solving Reynolds-Averaged Navier-Stokes equations and these results consist well with the manufacturer＇s data, the error is less than 1.5%, which verifies that the method this paper used is exact and believable. Secondly, the motorboat＇s performance is calculated by CFD and CFX-post is used to analyze the defects resulted from design. Finally, the study uses one-stage stator instead of two-stage stator and designs a new meridional channel, which uses 3D design method to solve the design defects by change the loading distribution. At last, the axial pump＇s efficiency is increased by 5%, the results indicate that 3D design method is practical.
出处
《机电设备》
2015年第6期72-78,共7页
Mechanical and Electrical Equipment
