旋流气粒两相流动的研究  

Studies on Swirling Gas-Particle Flows

作　　者：周力行[1] 

机构地区：[1]清华大学航天航空学院工程力学系,北京100084

出　　处：《工程热物理学报》2015年第5期1028-1032,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51390493;No.51266008)

摘　　要：旋流气粒两相流动广泛存在于燃气轮机燃烧室,旋风分离器和旋风炉,锅炉旋流燃烧器等装置中。用测量和数值模拟更好地了解其流动特性,对优化和放大设计,用以提高燃烧效率和收集效率、降低流动阻力和污染物排放,稳定火焰,都十分重要。对其进行了系统的实验测量和数值模拟研究,包括用相位多普勒仪等测量进行的实验研究,雷诺平均模拟和大涡模拟的数值研究,阐明了两相速度,两相湍流特性和颗粒浓度分布等规律,有助于研制低阻力和高效率低污染燃烧装置。Swirling gas-particle flows are commonly encountered in gas-turbine combustors,cyclone separators,cyclone combustors,and swirl burners in furnaces.To better understand the flow behavior by using measurements and numerical simulation is important for optimization and scaling-up of design,in order to increase the combustion efficiency and separation efficiency,reduce the pressure drop and pollutant formation,and stabilize the flame.Many-year systematic experimental and numerical studies of swirling gas-particle flows were done by the research group directed by the present author,including PDPA(phase Doppler particle anemometer) measurements,Reynolds-averaged simulation and LES(large-eddy simulation).The results give the two-phase time-averaged velocities,two-phase RMS fluctuation velocities,and particle concentration distribution,which will help to develop highly efficient and low pressure-drop,low pollutant combustors.

关 键 词：旋流流动 气粒流动 PDPA测量 数值模拟 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]