Abstract：To further explore the influence of different factors on the hydraulic characteristics of the moving boundary annulus flow, through tests and theoretical analyses, annuluses with widths of 25,20,15,10 mm respectively were studied. The test was carried out in the straight pipe segment of the pipeline system, whose control volume is 60 m3/h, using barreled feed pipe carriage weighted 750 g. The research shows that the moving boundary annulus flow in straight pipe segment is turbulent morphology. Pressure values of measurement points in the annulus cross section tend to cluster as the width of the annulus increases. In the same section, pressure around the moving boundary of carriage is lower and pressure around the fixed pipe wall is higher. With the same width, the axial velocity sectional distribution is more uniform in the middle section than in the back or front. And the distribution is a layered one around the carriage body of which higher around the dynamic boundary and lower around the fixed border. When the width is 20mm, the axial distribution uniformity is best. Circumferential velocity shows uneven distribution in sections along the carriage under various conditions of different annulus widths.
［1］许贤良，朱兵，张军，等.同心环隙流理论研究\[J\].安徽理工大学学报：自然科学版，2004,24(3):40-42.Xu Xianliang, Zhu Bing, Zhang Jun,et al.The research of the concentric ring slit flow\[J\]. Journal of Anhui University of Science and Technology: Natural Science, 2004, 24(3): 40-42.(in Chinese)［2］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\[J\].山西水利，2008(2)：42-43.Tong Xuewei, Li Yongye, Sun Xihuan. Experimental system design on the piped hydraulic transportation of tubecontained raw material\[J\].Shanxi Water Resources, 2008(2)：42-43.(in Chinese)［3］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试验研究\[J\].农业机械学报，2008,39(12):93-96.Li Yongye,Sun Xihuan,Yan Yaoxing. Hydraulic characteristics of tubecontained raw material hydraulic transportation under the different loads on the pipedcarriage\[J\]. Transactions of the Chinese Society for Agricultural Machinery, 2008,39(12):93-96.(in Chinese)［4］孙西欢，李永业. 管道车在有压管道中运动的试验研究\[C\]∥第二十二届全国水动力学研讨会论文集,2009:416-422.［5］孙西欢，李永业. 筒装料管道水力输送影响因素分析\[C\]∥水力学与水利信息学研究进展论文集,2009:371-375.［6］Deniz Ulusarslan, Ismail Teke. An experimental investigation of capsule velocity, concentration rate and the spcing between the capsule for spherical capsule train flow in a horizontal circular pipe \[J\]. Powder Technology, 2005,159 (1/2):27-34.［7］Wisuwat P. Smallscale tubular linear induction motor for pneumatic capsule pipeline system\[C\]∥Proceeding of International Conference on Electrical Machines and Systems,2007:1528-1532.［8］Robert M, O′Connell P E, Liu H, et al. Performance of pneumatic capsule pipeline freight transportsystem driven by linear motor\[J\]. Journal of Transportation Engineering,2008,134(1):50-58.［9］Deniz U, Ismail T. An experimental determination of pressure drops in the flow of low density spherical capsule train inside horizontal pipes\[J\].Experimental Thermal and Fluid Science ,2006,30(3):233-241.［10］Deniz U. Determination of the loss coefficient of elbows in the flow of lowdensity spherical capsule train \[J\]. Experimental Thermal and Fluid Science, 2007,32(2):415-422.［11］Deniz U.Comparison of experimental pressure gradient and experimental relationships for the low density spherical capsule train with slurry flow relationships\[J\]. Powder Technology,2008, 185 (2):170-175.［12］Ismail T, Deniz U.Mathematical expression of pressure gradient in the flow of spherical capsules less dense than water\[J\]. International Journal of Multiphase Flow,2007,33 (6):658-674.［13］林愉，陶燕.水平同心型料管道输送的数学模型\[J\].化工矿物与加工，2001(10):11-14.Lin Yu,Tao Yan. A mathematical model for concentric horizontal materiallog flow in pipeline\[J\]. Industrial Minerals and Processing,2001(10):11-14. (in Chinese)［14］李永业，孙西欢，李飞，等.动边界同心环状缝隙流研究\[J\].农业机械学报，2012,43(3):230-234. Li Yongye,Sun Xihuan,Li Fei, et al .Cyclical flit flow of concentricity under the moving boundary condition\[J\].Transactions of the Chinese Society for Agricultural Machinery, 2012,43(3):230-234.(in Chinese)
