蛍光・散乱光法による非蒸発噴霧のザウタ平均粒径測定に関する研究

抄録

A new technique is proposed to measure the two-dimensional local Sauter mean diameter (S.M.D.) distribution of droplets in an unsteady diesel spray. The technique is based on the principle of fluorescence and Mie scattering of droplets in the spray. NNN'N'-tetramethyl-p-phenylene diamine (TMPD, 1% by weight) is dissolved in fuel as a fluorescence dopant. When the laser light sheet illuminates particles in a cross section of the spray, they emit the fluorescence and the Mie scattering light. The fluorescence and scattering signals are imaged simultaneously by an optical system composed of a doubling prism, optical filters, and a high-speed gated image intensifier coupled with a CCD camera. The local particle size distribution is obtained by calculating the ratio of the two light intensities at each point on the image.