为进一步完善圆柱体绕流环隙流场理论,采用理论分析和模型试验相结合的方法,对不同流量及环隙比条件下圆柱体绕流环隙流场进行了研究,得出其轴向速度及水力损失随测点距离管道中心距离的变化关系曲线,并给出环隙水流轴向速度及水力损失分布曲线以及随流量及环隙比变化的相关拟合公式。试验结果与拟合公式基本一致,相关系数大部分在0.95以上,说明拟合公式是可行的。试验结果为圆柱体绕流环隙流场理论研究及实际应用提供了支撑。
Abstract
To further improve the theory of annulus flow field of the flow around cylinder, we combined theoretical analysis with model test to research the annulus flow field around cylinder in the presence of different flow rates and annulus ratios. The variations of axial velocity and hydraulic loss along with the distance of measurement point to the cylinder center are obtained, and the fitting formulas describing the variations of axial velocity and hydraulic loss with flow rate and annulus ratio are given. The test results are consistent with the fitting formulas, and most of the correlation coefficients are above 0.95, indicating that the fitting formulas are feasible. The result is a test support for the theoretical research and practical application of the annulus flow field around cylinder.
关键词
圆柱体 /
环隙流场 /
轴向流速 /
水力损失 /
流量 /
环隙比
Key words
cylinder /
annulus flow field /
axial flow velocity /
hydraulic energy consumption /
flow rate /
annulus ratio
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 许贤良,朱 兵,张 军,等. 同心环形缝隙流理论研究[J].安徽理工大学学报:自然科学版,2004,24(3):40-42.(XU Xian-liang,ZHU Bing,ZHANG Jun,et al. The Research of the Concentric Ring Slit Flow. Journal of Anhui University of Science and Technology: Natural Science, 2004, 24( 3) : 40-42.(in Chinese))
李永业,孙西欢,李 飞,等.动边界同心环状缝隙流研究.农业机械学报,2012, 43(3):231-234.(LI Yong-ye, SUN Xi-huan, LI Fei, et al. Cyclical Slit Flow of Concentricity under the Moving Boundary Condition. Transactions of the Chinese Society for Agricultural Machinery, 2012, 43(3):231-234. (in Chinese))
胡仁喜,苑士华,刘红宁,等.高压高速条件下柱塞副泄漏流场分析[J].农业机械学报,2009,40(4):221-226. (HU Ren-xi,YUAN Shi-hua,LIU Hong-ning,et al. Analysis on the Leaking Flow Field of the Piston Sector Considering the High Press and High Velocity. Transactions of the Chinese Society for Agricultural Machinery, 2009, 40(4): 221-226.(in Chinese))
林 愉.绕静止圆柱体型料的管道流水力损失.农业机械学报,2008,39(12):93-96. (LIN Yu. Hydraulic Energy Consumption in Annulus Flow Field of the Flow around Cylinder. Transactions of the Chinese Society for Agricultural Machinery, 2008,39(12):93-96.(in Chinese))
阎庆绂,张晓东,武利生,煤锭管道输送的平均能耗.水力采煤与管道输送,2003,29(3):36-39. (YAN Qing-fu, ZHANG Xiao-dong, WU Li-sheng. The Average Consumption of Coal Log Piped Transportation. Hydraulic Coal Mining & Pipeline Transportation, 2003,29(3):36-39. (in Chinese))
李永业,孙西欢,延耀兴.管道车不同荷重时筒装料管道水力输送特性.农业机械学报,2008,39(12):93-96. (LI Yong-ye,SUN Xi-huan,YAN Yao-xing. Hydraulic Characteristics of Tube-contained Raw Material Hydraulic Transportation under the Different Loads on the Piped Carriage. Transactions of the Chinese Society for Agricultural Machinery, 2008,39( 12) : 93-96.(in Chinese))
童学卫,李永业,孙西欢.筒装料管道水力输送试验系统设计研究.山西水利,2008,(2):42-43. (TONG Xue-wei, LI Yong-ye, SUN Xi-huan. Experimental System Design on the Piped Hydraulic Transportation of Tube-contained Raw Material. Shanxi Water Resources,2008, (2) : 42 -43.(in Chinese))
毛 宁. 关于求解力学中常用关系曲线的经验公式. raybet体育在线
院报, 2009, 26(10): 54-57. (MAO Ning. How to Find Empirical Formulas of Usual Relation Curves in Mechanics. Journal of Yangtze River Scientific Research Institute, 2009, 26(10): 54-57. (in Chinese))
基金
国家自然科学基金项目 (51109115,51179116)
PDF(1355 KB)
