Review on Main Equations for Measuring Spray Properties in Centrifugal Injectors

Ali Kamranpey

Abstract

The method of fuel injection has a significant effect on the stability and proper mixing of fuel and oxidizer, which is done by the injector. In other words, the injector is a device that converts fluid into droplets. The faster and better the particle crushing rate, the faster the fluid particles will evaporate, resulting in higher thermal efficiency and higher thrust force. Therefore, how to inject fuel into the combustion chamber is a very important issue in the combustion process, which due to the high complexity, the spray atomization process is somewhat unknown. Due to the fact that one of the most important types of injectors are centrifugal injectors, so in this article we try to address some of the main parameters of the atomization process such as spray cone angle, droplet diameter, etc. in this type of injectors. The name of this injector derives from the rotation of the liquid inside it. These injectors are divided into several categories, all of which in general guarantee a good particle size for medium and even small pressure drops. Because of this and their relatively simple design, centrifugal injectors are the most widely used of all injector types, including gas turbines and air conditioning systems. The results showed that the spray of centrifugal injectors is in the form of a hollow cone. Also, the total velocity and its components reach their maximum value on the edge of the spray cone. Studies have also shown that each of the geometric parameters has a very clear effect on the spray angle and discharge coefficient and droplet diameter.

Abstract

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