Simultaneous measurement of particle size, velocity and temperature

• Published in: Measurement science & technology Vol. 4; no. 5; pp. 559 - 565
• Main Authors: Fincke, J R, Swank, W D, Jeffery, C L, Mancuso, C A
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.05.1993; Institute of Physics
• Subjects: Exact sciences and technology; Physics; Physics of gases, plasmas and electric discharges; Physics of plasmas and electric discharges; Plasma devices; Plasma application; Temperature; Plasma jet; Laser beam; Size; Simultaneous measurement; Micron size particle; Experimental study; Plasma spraying; Thermal plasma; Pyrometry; Velocity
• ISSN: 0957-0233; 1361-6501
• DOI: 10.1088/0957-0233/4/5/003

A measurement technique for simultaneously obtaining the size, velocity and temperature of particles entrained in thermal plasma jets (i.e. for nickel alloy plasma coating) is described. Particle size and velocity are obtained from a combination laser sizing system and laser Doppler velocimeter (LDV). The particle temperature is determined by two-colour pyrometry and the data rate is a measure of relative particle number density. Since particle size, velocity and temperature are measured simultaneously, cold, solid particles or unmelts are identified and their relative number density can be quantified. Typical data are presented.