【摘要】 研究了一种气固两相流粒子群宽粒径分布的测试方法 ;对 0 .1～ 2 0 0 0 μm大粒子的粒径测试给出了理论分析和试验验证。提出了以较大发散角的低功率半导体激光器为光源 ,用侧向椭球反射镜接收散射光 ,并用概率统计的方法可以测量 0 .1～ 2 0 0 0μm粒子的粒径分布。该方法可以应用于电厂、环保等领域的粉尘监测 ,具有较高的实用价值。更多还原

【Abstract】 A light scattering method is presented to determine the distribution of the particles in two phase flows of gas solid. Not only the theoretical analysis but also the experiments on measuring the diameters of the particles in the range of 0.1~2 000 μm is made. The light intensity scattered by the particles is related to the size, property of the material and its shape. But with large amount of particles it obeys the statistic rule. By calibrating the relations between the particle distributions and the responses the response matrix can be obtained. Beacuse of semi conductor laser has lower power and bigger scattering angle, and ellipsoidal reflector can receive scattering light, the distribution of the particles of 0.1~2 000 μm scale can be measured and obtained by statistics. This method can be used to measure particle distribution in such fields as power factory, environment protection.更多还原