全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

偏工况下壁面粗糙度对泵腔内流动规律的影响

Keywords: 壁面粗糙度,泵腔,圆盘摩擦损失,泄漏

Full-Text   Cite this paper   Add to My Lib

Abstract:

本文将结合雷诺时均方程、RNGk-varepsilon湍流模型和等效沙粒粗糙度模型,研究一离心泵泵腔内的流动规律与壁面粗糙度和运行工况的关系。研究表明:壁面粗糙度对离心泵外特性的影响存在一个峰值,此时绝对粗糙度的值为0.2mm;随着流量的增加,壁面粗糙度对叶轮前、后盖板所受扭矩的影响增加、对离心泵轴功率的影响减小。设计工况下,前泵腔中存在无量纲切向速度alpha值不变的核心流动区域。在核心流动区域内,随着粗糙度的增加,alpha值先减小,达到极小值后趋于稳定,稳定值为0.51。在前盖板附近,极小值往粗糙度较大的方向移动。小流量工况下,湍流核心区域消失,动、静壁面附近alpha值随流量的变化规律相反。大流量工况下,湍流核心区域减小,且更加靠近静壁面。

References

[1]  赵斌娟, 王瑜, 陈汇龙等.离心泵尾流射流现象及粗糙度对其影响的分析 [J]. 农业机械学报, 2014,45(9): 138--143
[2]  ZHAO Bin-Juan, WANG Yu, CHEN Hui-Long, et al. Jet-Wake Flow in theChannel of Impeller and the Effect of Surface Roughness on it [J].Transactions of the Chinese Society for Agricultural Machinery,2014, 45(9): 138--143
[3]  李龙, 王泽. 壁面粗糙度对轴流泵性能影响的数值模拟研究 [J].农业工程学报, 2004, 20(1): 132--135
[4]  LI Long, WANG Ze. Simulation of the Influence of Wall Roughness onthe Performance of Axial-Flow Pump [J]. Transaction of the CSAE,2004, 20(1): 132--135
[5]  谈明高, 刘厚林, 吴贤芳等.壁面粗糙度对离心泵性能数值预测的影响 [J]. 中国农村水利水电,2011(2): 131--134
[6]  TAN MingGao, LIU HouLin, WU XianFang, et al. The Effect of Roughness on the Numerical Prediction of the Characteristics of Centrifugal Pumps [J]. China Rural Water and Hydropower, 2011(2):131--134
[7]  朱红耕, 鄢必鹏, 周济人.壁面壁面粗糙度对轴流泵水力性能影响的研究 [J]. 灌溉排水学报, 2006,25(1): 85--88
[8]  ZHU HongGeng, YAN BiPeng, ZHOU Jiren. Study on the Influence of Wall Roughness on the Hydraulic Performance of Axial-Flow Pumps [J]. Journal of Irrigation and Drainage, 2006, 25(1): 85--88
[9]  张兰金,常近时转轮表面糙度对水泵水轮机泵工况水力性能的影响 [J].水力发电学报, 2008, 27(2): 125--129
[10]  ZHANG LanJin, CHANG JinShi. Influence of Roughness of Runner on the Cavitation of Pump-Turbine in the Pump Mode [J]. Journal of Hydroelectric Engineering. 2008, 27(2): 125--129
[11]  Krogstad P A, Antonia R A. Surface Roughness Effects in Turbulent Boundary Layers [J]. Exp. Fluids, 1999, 27: 450--460
[12]  Shah M K, Agelinchaab M, Tachie M F. Influence of PIV Interrogation Area on Turbulent Statistics Up to 4th Order Moments in Smooth And Roughness Wall Turbulent Flows [J]. Exp. Therm.Fluid Sci, 2008, 32: 725--747
[13]  Huang K, Wan J W, Chen C X, et al. Experiments Investigation of the Effects of Surface Roughness on Laminar Flow in Macro Tubes [J]. Exp. Therm. Fluid Sci, 2013, 45: 243--248
[14]  Marchis M De, Napoli E. Effects of Irregular Two-Dimensional and Three-Dimension Surface Roughness in Turbulent Channel Flows [J]. International Journal of Heat and Fluid Flow,2012, 36: 7--17
[15]  Dierich F, Nikrityuk P A. A Numerical Study of the Impact of Surface Roughness on Heat and Fluid Flow Past A Cylindrical Particle [J]. International Journal of Thermal Sciences, 2013, 65: 92--103
[16]  LIU HouLin, REN Yun, WANG Kai, et al. Research of Inner Flow in a Double Blades Pump Based on Openfoam [J]. Journal of Hydrodynamics, 2012, 24: 226--234
[17]  赵斌娟, 侯多华, 陈汇龙等.叶轮流道结构对双流道泵性能的影响 [J]. 排灌机械工程学报, 2013,31(4): 294--299
[18]  ZHAO BinJuan HOU DuoHua, CHEN HuiLong, et all. Influence of Impeller Passage Structure on Performance of Double-Channel Pumps [J]. Journal of Drainage and Irrigation achinery Engineeing,2013, 31(4): 294--299
[19]  Khabbouchi I, Guellouz M S, Nasrallah S Ben. A Study of the Effect of the Jet-Like Flow on the Near Wake Behind A Circular Cylinder to a Plane Wall [J]. Experiment Thermal and Fluid Science, 2013, 44: 285--300
[20]  Li WenGuang. Model of Flow in the Side Chambers of an Industrial Centrifugal Pump for Delivering Viscous Oil [J].Journal of Fluid Engineering, 2013, 135: 201--223
[21]  Echouchene F, Belmabrouk H, Penven L Le, et al.Numerical Simulation of Wall Roughness Effects in Cavitating Flow [J]. International Journal of Heat and Fluid Flow, 2011, 32:
[22]  --75

Full-Text

comments powered by Disqus

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133

WeChat 1538708413