Development of an Optical Measurement Test Rig for Fuel Spray Characteristics Study of a Diesel Direct Injection System—An Experimental Approach

Abstract

Optical measurement techniques have been proven by many researchers in obtaining fundamental spray and combustion characteristics either in a real engine combustion chamber or in a constant volume combustion chamber (CVCC). This technique can be used to observe the spray development and flame behaviour during the combustion process. Few renewable energy resources were extensively studied by various researchers. However, the measurement of its performance is not focusing to their fundamental characteristics especially on the spray characteristics such as tip penetration and cone angle. In this work, an experimental setup was designed to investigate the spray and combustion characteristics at various injection pressures. To examine the effect of different injection configurations, an optical measurement technique in a CVCC was used. The experimental setup consisted of a constant volume combustion chamber, sensors, and high-speed camera. The results were compared at various injection pressures in terms of spray development. The experimental setup was successfully developed to obtain the spray characteristics such as tip penetration and cone angle.