Evaluation of Vaporizing Diesel Spray with High-Speed Laser Absorption Scattering Technique for Measuring Vapor and Liquid Phase Concentration Distributions

The Conventional Laser Absorption Scattering (C-LAS) technique is used to measure the mixture concentration and visualize vapor phase. former determined by attenuation of visible ultraviolet light whereas latter achieved via absorption scattering theory. C-LAS uses Nd: YAG pulsed laser CCD cameras provide one spray shot at a particular instance which requires time effort. However, temporal measurement single not possible. To record distribution whole phase in an injection event liquid concentrations inside spray, High-Speed (HS-LAS) was developed. HS-LAS consists continuous diode sources, high-speed video cameras, image intensifier for UV light, can variation single-shot spray. In experiment, commercial seven-hole injector with hole diameter 0.123 mm allowing high pressure up 100 MPa avoid potential inconsistencies single-hole test injector. diesel surrogate fuel 97.5% n-tridecane 2.5% volume-based 1-methylnaphthalene used. amount 5.0 mg/hole selected investigate structure formation process findings experiments show that this imaging approach promising diagnostic concurrently obtaining quantitative information on quantity droplets Furthermore, turbulent/vortex fluid dynamics’ development/variation be investigated.