论文部分内容阅读
本文介绍了一种用于测量水殊直径的消光法测量装置.用这一测量装置进行测量、并按Gyarmathy 的方法推算所得的Laval 喷管膨胀湿蒸汽中的水珠直径为0.07～0.1μm.对两种已知微粒直径的聚苯乙烯标准乳胶悬浮液构成的两元散布体的测量结果表明,测量装置的光学系统是可靠的.本文提出了通过平均消光系数比光谱曲线确定水珠直径分布规律的方法.本文还指出,当水珠直径服从一种典型的上限分布函数时,水珠的Sauter 平均直径的消光法(图解匹配法和双波长法)测量范围是0.095～2μm.在该测量范围内,可以忽略前向散射对平均消光系数的影响.
In this paper, an extinction measuring device for measuring the diameter of water was introduced, and the measuring device was used to measure the diameter of water droplets in the expanded wet steam of Laval nozzle according to Gyarmathy’s method to be 0.07 ~ 0.1μm. The measurement results of binary dispersions made of two polystyrene standard latex suspensions of known particle diameter show that the optical system of the measuring device is reliable.The paper presents a method to determine the droplet diameter distribution by means of the average extinction coefficient ratio spectrum The method of extinction (graphical matching method and dual-wavelength method) of Sauter mean diameter of water droplet is 0.095 ~ 2μm when the diameter of droplet obeys a typical upper limit distribution function. Within the range, the effect of forward scatter on the average extinction coefficient can be neglected.