Nonintrusive Measurement of the Structure of Dense Sprays

Abstract

Nomenclature D = imaging lens diameter d -injector exit diameter dp -drop diameter £/32 = Sauter mean diameter / = imaging lens focal length 7 = intensity of electromagnetic radiation L = interdroplet spacing / = optical beam path length n = drop number density Oh = Ohnesorge number r = radial distance u = streamwise velocity Aw = depth of field V -visibility We = Weber number x = streamwise (axial) distance z = far-field distance a -volume fraction 8 = effective absorber thickness r] = total linear attenuation coefficient, extinction coefficient r] m = total mass attenuation coefficient Downloaded by PURDUE UNIVERSITY on July 26, 2015 | http://arc.aiaa.org | A = wavelength of the electromagnetic radiation IJL = molecular viscosity p = density a = surface tension Subscripts f -liquid-phase proprerty g = gas-phase property 0 = initial value or jet exit condition Purchased from American Institute of Aeronautics and Astronautics Downloaded by PURDUE UNIVERSITY on July 26, 2015 | http://arc.aiaa.org | Downloaded by PURDUE UNIVERSITY on July 26, 2015 | http://arc.aiaa.org | Downloaded by PURDUE UNIVERSITY on July 26, 2015 | http://arc.aiaa.org | Downloaded by PURDUE UNIVERSITY on July 26, 2015 | http://arc.aiaa.org | Downloaded by PURDUE UNIVERSITY on July 26, 2015 | http://arc.aiaa.org |