On the Viscosity of the Colored Smoke Oil for Jet Planes

Abstract

The colored smoke trails from jet planes are generated by volatilizing colored smoke oils with hot exhaust gases from the jet engines. The colored smoke oil is a slurry, which is a mixture of selected dye with petroleum base oil. The colored smoke oil is a non-Newtonian fluid subject to the following power law. S=η′Dn(1) where S is the shearing stress, D the rate of shear, η′ the consistency index, and n the flow-behavior index. The following experimental equations were derived at low rates of shear. η′=η0 exp (kC) (k>0) (2) n= exp (-k′C) (k′>0) (3) where η0 is the viscosity of the base oil, C is the concentration of the dye, and k and k′ are the constants characteristic to the kinds of dyes. © 1966, The Society of Materials Science, Japan. All rights reserved.