颗粒粒径和气载比改变时湍流调制的变化  

Turbulence modulations caused by change of particle size and particle mass loading ratio

作　　者：王兵[1] 刘毅[1] 王希麟[1] 

机构地区：[1]清华大学航天航空学院北京市3E能源重点实验室,北京100084

出　　处：《航空动力学报》2009年第8期1818-1823,共6页Journal of Aerospace Power

基　　金：国家自然科学基金(50876053;50706021)

摘　　要：采用相多普勒颗粒分析仪(PDPA)测试了两相圆湍射流速度场,研究了颗粒雷诺数较小情况下,粒径和气载比变化时颗粒对气固两相圆湍射流的湍流调制作用.实验结果表明:颗粒粒径的减小或气载比的增加均使颗粒对气相湍流度的削弱作用增强.通过无量纲化的分析,表明颗粒粒径的减小对气相湍流度的削弱程度强于气载比增加时对湍流度的削弱程度.The velocity fields in particle-laden two-phase round turbulent jets were measured by means of phase Doppler particle analyzer(PDPA).The turbulence modulations caused by the change of particle size and particle mass loading ratio were studied under the condition of small particle Reynolds number.The measured results of turbulence intensities show that particles have more pronounced effects on the attenuation of the gas-phase turbulence,if the particle diameter reduces,or the particle mass loading ratio incr...

关 键 词：气固两相流 圆湍射流 湍流调制 气载比 粒径 相多普勒颗粒分析仪 

分 类 号：O359.1[理学—流体力学]