大气湍流与气溶胶环境室内模拟方法的研究

在实验室内利用大气模拟池模拟了大气湍流作用,大气湍流的强度可以通过控制模拟池上下板面之间的温度差来调节。同时,在模拟池内模拟了PM2.5环境,利用颗粒传感器测量PM2.5的浓度值。由于大气能见度主要受PM2.5的影响,我们获取了北京某地区一段时间内的空气质量数据,对两者之间的关系进行数值拟合,并得到了两者之间的回归模型。将该回归模型应用到大气模拟池,计算模拟大气的能见度,并与气象局公布的北京市丰台地区的空气质量进行比对,检验模拟池对PM2.5环境模拟的准确性。该模拟池在湍流模拟的基础上,又对PM2.5环境进行了模拟,该方法可行、理论依据充分,为日后研究激光大气传输提供了可靠的室内实验平台。

Research on the methods of simulating turbulence and aerosol environment in doors

Atmosphere turbulence with an atmospheric simulator in our lab is simulated,the intensity of which can be controlled by adjusting the temperature difference of up and low boards. At the same time,we burn coal and cigarettes in the simulator to simulate PM2.5,and measure its concentration with a laser sensor. For atmospheric visibility is principally influenced by PM2.5,We acquire the air quality data of a certain area in Beijing within a period of time to fit the relation of the two variables and we get the regression model at last. We apply this regression model to our simulator,and calculate the visibility of the simulative atmosphere,comparing it with the air quality data of Fengtai,Beijing to test the reliability of our simulator . It shows that our atmospheric simulator simulates not only the turbulence,but also PM2.5,with feasible method and sufficient theoretical foundation.That provides an indoor experimental platform for researching laser atmosphere transmission.