Application of Maximum Entropy Principle to Predict Droplet Size Distribution for Swirl Injectors

An existing droplets size distribution function, which was established based on the maximum entropy principle, momentum conservation law and energy conservation law, was used to predict the characteristics of spray field of a swirl injector with small geometry characteristics constant. The experimental system for spray characteristics was built, and an experimental study on the spray characteristics of swirl injectors with different geometries was conducted with phase Doppler particle analyzer (PDPA). It shows a coincidence between the experimental results and the spray characteristics predicted with the maximum entropy principle. The maximum entropy method can be a useful tool for the design of this type of injector.