轴流泵空化状态下轴向推力下降研究
发布时间：2018-10-18 10:49
【摘要】：基于RANS方程,结合切应力输运湍流模型计算某对旋轴流式喷水推进泵无空化状态时的流体动力性能。在此基础上,嵌入基于Rayleigh-Plesset方程的混合物均相流空化模型,对空化条件时该对旋轴流泵流体动力性能进行数值计算。结果发现,空化引起对旋轴流泵轴向推力下降,泵的轴向推力空化特性曲线与扬程空化特性曲线相似,但是轴向推力的下降点比扬程的下降点推迟5.1%,而临界点则推迟了2.6%;首级叶轮和次级叶轮的轴向推力均存在空化临界点;在临界点之前,首级叶轮的轴向推力逐渐上升,而次级叶轮的轴向推力逐渐下降。
[Abstract]:Based on RANS equation and shear stress transport turbulence model, the hydrodynamic performance of a counter-rotating axial flow water jet propulsion pump without cavitation is calculated. On this basis, a mixture homogeneous flow cavitation model based on Rayleigh-Plesset equation is embedded to numerically calculate the hydrodynamic performance of the counter-rotating axial flow pump under cavitation conditions. The results show that the axial thrust decreases due to cavitation, and the cavitation characteristic curve of axial thrust is similar to that of head. However, the descending point of axial thrust is 5.1 delayed than that of head, and the critical point is 2.6. The axial thrust of first stage impeller and secondary impeller has cavitation critical point; before the critical point, the axial thrust of first stage impeller increases gradually. The axial thrust of secondary impeller decreases gradually.
【作者单位】： 江苏大学京江学院;江苏大学流体机械工程技术研究中心;
【基金】：江苏省自然科学基金面上研究项目(BK20151342)
【分类号】：U664.34
本文编号：2278892
[Abstract]:Based on RANS equation and shear stress transport turbulence model, the hydrodynamic performance of a counter-rotating axial flow water jet propulsion pump without cavitation is calculated. On this basis, a mixture homogeneous flow cavitation model based on Rayleigh-Plesset equation is embedded to numerically calculate the hydrodynamic performance of the counter-rotating axial flow pump under cavitation conditions. The results show that the axial thrust decreases due to cavitation, and the cavitation characteristic curve of axial thrust is similar to that of head. However, the descending point of axial thrust is 5.1 delayed than that of head, and the critical point is 2.6. The axial thrust of first stage impeller and secondary impeller has cavitation critical point; before the critical point, the axial thrust of first stage impeller increases gradually. The axial thrust of secondary impeller decreases gradually.
【作者单位】： 江苏大学京江学院;江苏大学流体机械工程技术研究中心;
【基金】：江苏省自然科学基金面上研究项目(BK20151342)
【分类号】：U664.34
【相似文献】
相关期刊论文 前8条
1 郭智辉;;预应力钢筒混凝土管线轴向推力计算及处理措施[J];山西水利;2006年03期
2 党原健,杜选民,郭平英,马军,李永华;略阳电厂5号汽轮机降低轴向推力恢复铭牌出力试验研究[J];西北电力技术;1997年06期
3 姚宏伟,柴伟东,张志强,于达仁;300MW汽轮机组动态轴向推力计算数学模型及仿真研究[J];汽轮机技术;2002年06期
4 张盛宏,李玉升,路世界;汽轮机轴向推力大的原因分析及处理措施[J];中氮肥;2003年04期
5 朱一民;;滑动轴承承受轴向推力新结构[J];机械制造;1989年07期
6 李国辉;;汽轮机轴向推力大的原因及处理方法[J];科技创新与应用;2013年25期
7 齐治国;赵灿;张义举;;多层缠绕卷筒端侧板轴向推力的试验研究[J];建筑机械;1990年11期
8 ;[J];;年期
相关重要报纸文章 前1条
1 徐大懋;我经历的火电“里程碑”事件[N];国家电网报;2008年
，本文编号：2278892
本文链接：https://www.wllwen.com/kejilunwen/chuanbolw/2278892.html
