Combustion of sprays in an oxidixing atmosphere

Abstract

1. - The Mathematic representation of the statistical size distribution of droplets injected into the combustion chamber of a Diesel engine and a gas turbine, is discussed. After consideration is given to some of the distributions proposed for other Technical Sciences (Meteorology - Gravimetrology, etc.), the Mugele Evans distribution is selected as the most adequate for the problem. 2. - The combustion of a spray under ideal conditions is analyzed. It is assumed for it that each droplet burns in accordance with a theoretical law whose validity has been experimentally verified for a few simple cases - isolated droplets at rest or in motion, set of droplets in motion whose relative positions remain invariable, etc.* The particular cases considered are the following: Combustion at the beginning and end of the injection. Combustion at an instant sufficiently far in time from both the above cases. Combustion of a volume injected instantaneously as approximately occurs in a Diesel engine and, finally, superposition of isolated successive injections. 3. - The scaling of atomizers and combustion chambers is analyzed.