Initial Perturbation Amplitude of Liquid Sheets Produced by Jet-Impingement Nozzles

The liquid-film atomization nozzles have numerous applications, such as in gas turbines, liquid-fueled rocket engines, automobile engines, and recovery boilers in the pulp and paper industry. One method of film formation is by impinging a liquid jet on a solid surface. This method has several advantages, such as low injection-pressure loss and high controllability of the generated liquid film. This Note examines the validity of the commonly used parameters for the initial amplitude and provides a new procedure to determine the initial amplitude with improved accuracy and universality.