FLUENT对云凝结核计数器云室内气流特征的模拟研究  

Simulation of Flow in Continuous-Flow Cloud Condensation Nuclei Counter(DMT-CCNC)

作　　者：于仁杰[1] 赵春生[1] 薛惠文[1] 马楠[1] 陶江川[1] 付仕佐 张健鹏[2] 旷烨 刘宏剑 边宇轩 

机构地区：[1]北京大学物理学院大气与海洋科学系,北京100871 [2]北京大学工学院湍流与复杂系统国家重点实验室,北京100871

出　　处：《北京大学学报（自然科学版）》2017年第5期817-824,共8页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家重点基础研究发展计划(2013CB955803)资助

摘　　要：运用计算流体力学模型ANSYS FLUENT,对DMT公司的恒流热梯度云凝结核计数器(CCNC)云室内的流场、温度场以及水汽场进行模拟。依据外场观测和室内实验中的常用进气流速0.0164,0.0185,0.0205,0.0226和0.0246 m/s以及云室温差2,8和17 K,对比不同进气流速和云室温差对云室内流场的影响。结果显示,云室内的速度场和温度场均受进气流速和云室温差的影响。当云室温差为8 K,进气流速为0.0205m/s时,模拟出的云室中心线的过饱和度约为0.27%,较好地模拟出云室内的水汽过饱和状态。The velocity, temperature and humidity in the chamber of the Continuous Flow Streamwise ThermalGradient CCN Counter manufactured by DMT were successfully simulated using the computational fluid dynamics software ANSYS FLUENT. With velocity of 0.0164, 0.0185, 0.0205, 0.0226, 0.0246 m/s and temperature settings of ΔT 2, 8 and 17 K, the influence of velocity and temperature on the flow were tested. Results show that, velocity and temperature setting of CCNC influenced both velocity field and temperature field. When ΔT=8 K, v=0.0205 m/s, the supersaturaiton on the centerline was about 0.27%. Supersaturation in the CCNC chamber was simulated successfully.

关 键 词：云凝结核计数器(CCNC) ANSYS FLUENT 速度场 温度场 水汽场 

分 类 号：P414.8[天文地球—大气科学及气象学]