补气孔对扫路车吸嘴吸尘性能的影响
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摘要
应用可实现的k-ε湍流模型和离散相模型对扫路车吸嘴内腔气固两相流进行数值模拟,研究补气孔对吸嘴吸尘性能的影响.模拟结果表明:从补气孔进入高速气流可以明显加强吸嘴内腔靠近路面处气流强度和吸管底部上升气流强度,有利于尘粒扬起和提升并进入吸管.单个尘粒运动轨迹追踪表明补气孔产生的气流能使尘粒在吸嘴内的运动更顺畅.尘粒轨迹统计结果表明:补气孔极大降低尘粒在吸嘴内滞留的比例和平均停留时间,显著提高吸嘴吸拾尘粒能力.
To study the effect of the gas supplement hole on the dust suction performance of a road sweeper dust mouth,the gas-solid two-phase flow in the dust mouth is numerically simulated by the realizable k-ε turbulence model and the discrete phase model. The simulation results show that,the gas flow in suction mouth which is close to road surface and the gas flow from the suction pipe bottom can be strengthened effectively by the high-speed gas from gas supplement hole,and the dust particles can be raised from road surface and sucked into the suction pipe effectively. The single particle trajectories indicate that the gas from gas supplement hole can make the particle movement more smoothly in the suction mouth. The statistical results of particle trajectories show that the supplement gas hole can decrease the residence ratio and average residence time of particles in suction mouth,which improves the dust suction performance effectively.
To study the effect of the gas supplement hole on the dust suction performance of a road sweeper dust mouth,the gas-solid two-phase flow in the dust mouth is numerically simulated by the realizable k-ε turbulence model and the discrete phase model. The simulation results show that,the gas flow in suction mouth which is close to road surface and the gas flow from the suction pipe bottom can be strengthened effectively by the high-speed gas from gas supplement hole,and the dust particles can be raised from road surface and sucked into the suction pipe effectively. The single particle trajectories indicate that the gas from gas supplement hole can make the particle movement more smoothly in the suction mouth. The statistical results of particle trajectories show that the supplement gas hole can decrease the residence ratio and average residence time of particles in suction mouth,which improves the dust suction performance effectively.
引文
[1]陈忠基,吴晓元,徐广谱,等.路面清扫车吸嘴装置的试验研究[J].同济大学学报(自然科学版),2001,29(12):1483-1485.CHEN Zhongji,WU Xiaoyuan,XU Guangpu,et al.Experimental study on suction mouth of vacuum sweeper[J].J Tongji Univ,2001,29(12):1483-1485.
[2]欧阳智江,章易程,贾光辉,等.卷边吸尘口流场特性研究[J].机械科学与技术,2013,32(2):362-366.OUYANG Zhijiang,ZHANG Yicheng,JIA Guanghui,et al.Flow properties of dust suction mouth with curled edges[J].Mech Sci&Technol Aerospace Eng,2013,32(2):362-366.
[3]曾广银,李欣峰,肖田元,等.公路清扫车吸尘系统仿真设计[J].系统仿真学报,2004,16(12):2770-2773.ZENG Guangyin,LI Xinfeng,XIAO Tianyuan,et al.Simulation for design of dust suction system of highway sweeper[J].J Sys Simulation,2004,16(12):2770-2773.
[4]徐云,李欣峰,肖田元,等.计算流体力学在清扫车仿真分析中的应用研究[J].系统仿真学报,2004,16(2):270-273.XU Yun,LI Xinfeng,XIAO Tianyuan,et al.Research on application of computational dynamic fluid in simulation analysis of highway mechanical sweeper[J].J Sys Simulation,2004,16(2):270-273.
[5]朱伏龙,张冠哲,陈杰.真空吸尘车吸尘口的流场仿真和结构优化[J].机械设计与制造,2008(11):50-52.ZHU Fulong,ZHANG Guanzhe,CHEN Jie.Flow field analysis and structure optimization of vacuum sweeper suction mouth[J].Machinery Des&Manufacture,2008(11):50-52.
[6]姜兆文,成凯,龚宇明.吸扫式扫路车吸嘴流场性能分析[J].专用汽车,2012(12):92-97.JIANG Zhaowen,CHENG Kai,GONG Yuming.Nozzle system performance analysis for suction broom road sweeper[J].Spec Purpose Vehicle,2012(12):92-97.
[7]台冰丰,吴杰灵.清扫车吸尘口结构优化设计[J].专用汽车,2014(4):16-24.TAI Bingfeng,WU Jieling.Optimized design of suction mouth of sweeper[J].Spec Purpose Vehicle,2014(4):16-24.
[8]WU B,MEN J,CHEN J.Improving the design of a pickup head for particle removal using computational fluid dynamics[J].J Mech Eng Sci,2011,255(4):938-948.
[9]SHIH T H,LIOU W W,SHABBIR A,et al.A new k-εeddy viscosity model for high Reynolds number turbulent flows-model development and validation[J].Comput&Fluids,1995,24(3):227-238.
[10]王福军.计算流体动力学分析[M].北京:清华大学出版社,2004:120-122.
[11]张波,文建军.旋风除尘器流场仿真分析[J].计算机辅助工程,2011,20(2):100-103.ZHANG Bo,WEN JIanjun.Simulation and analysis on flow field of cyclone separator[J].Comput Aided Eng,2011,20(2):100-103.
[12]MODLLING A.Tracer particles and seeding for particle image velocimetry[J].Measurement Sci Technol,1997,8(12):1406-1416.
[13]HAIDER A,LEVENSPIEL O.Drag coefficient and terminal velocity of spherical and nonspherical particles[J].Powder Technol,1989,58(1):63-70.
[14]SAFFMAN P G.The lift on a small sphere in a slow shear flow[J].J Fluid Mech,1965,22:385-400.
[2]欧阳智江,章易程,贾光辉,等.卷边吸尘口流场特性研究[J].机械科学与技术,2013,32(2):362-366.OUYANG Zhijiang,ZHANG Yicheng,JIA Guanghui,et al.Flow properties of dust suction mouth with curled edges[J].Mech Sci&Technol Aerospace Eng,2013,32(2):362-366.
[3]曾广银,李欣峰,肖田元,等.公路清扫车吸尘系统仿真设计[J].系统仿真学报,2004,16(12):2770-2773.ZENG Guangyin,LI Xinfeng,XIAO Tianyuan,et al.Simulation for design of dust suction system of highway sweeper[J].J Sys Simulation,2004,16(12):2770-2773.
[4]徐云,李欣峰,肖田元,等.计算流体力学在清扫车仿真分析中的应用研究[J].系统仿真学报,2004,16(2):270-273.XU Yun,LI Xinfeng,XIAO Tianyuan,et al.Research on application of computational dynamic fluid in simulation analysis of highway mechanical sweeper[J].J Sys Simulation,2004,16(2):270-273.
[5]朱伏龙,张冠哲,陈杰.真空吸尘车吸尘口的流场仿真和结构优化[J].机械设计与制造,2008(11):50-52.ZHU Fulong,ZHANG Guanzhe,CHEN Jie.Flow field analysis and structure optimization of vacuum sweeper suction mouth[J].Machinery Des&Manufacture,2008(11):50-52.
[6]姜兆文,成凯,龚宇明.吸扫式扫路车吸嘴流场性能分析[J].专用汽车,2012(12):92-97.JIANG Zhaowen,CHENG Kai,GONG Yuming.Nozzle system performance analysis for suction broom road sweeper[J].Spec Purpose Vehicle,2012(12):92-97.
[7]台冰丰,吴杰灵.清扫车吸尘口结构优化设计[J].专用汽车,2014(4):16-24.TAI Bingfeng,WU Jieling.Optimized design of suction mouth of sweeper[J].Spec Purpose Vehicle,2014(4):16-24.
[8]WU B,MEN J,CHEN J.Improving the design of a pickup head for particle removal using computational fluid dynamics[J].J Mech Eng Sci,2011,255(4):938-948.
[9]SHIH T H,LIOU W W,SHABBIR A,et al.A new k-εeddy viscosity model for high Reynolds number turbulent flows-model development and validation[J].Comput&Fluids,1995,24(3):227-238.
[10]王福军.计算流体动力学分析[M].北京:清华大学出版社,2004:120-122.
[11]张波,文建军.旋风除尘器流场仿真分析[J].计算机辅助工程,2011,20(2):100-103.ZHANG Bo,WEN JIanjun.Simulation and analysis on flow field of cyclone separator[J].Comput Aided Eng,2011,20(2):100-103.
[12]MODLLING A.Tracer particles and seeding for particle image velocimetry[J].Measurement Sci Technol,1997,8(12):1406-1416.
[13]HAIDER A,LEVENSPIEL O.Drag coefficient and terminal velocity of spherical and nonspherical particles[J].Powder Technol,1989,58(1):63-70.
[14]SAFFMAN P G.The lift on a small sphere in a slow shear flow[J].J Fluid Mech,1965,22:385-400.