Experimental study of aviation kerosene atomization by mean of the compressed-air injection system with a high pressure
摘要
The paper investigates the geometry and droplet size distribution of a fuel spray produced by an injection system with air-assisted (pneumatic) atomizer. Two optical research methods, based on the processing of images obtained through shadow photography, were employed. The evolution of a pulsed spray was studied using a high-speed video camera with a macro lens. Droplet size distributions were studied using a camera equipped with a long-distance microscope and backlighting comprising a luminescent background screen and a pulse laser. The study was conducted for air-to-fuel mass flow rate ratios (ALR) of 1 and 0.16. The Sauter mean diameter for atomized droplets was 13 and 18 microns for the ratio values of 1.0 and 0.16, respectively.