Influence of cavitation on near nozzle exit spray

9th International Symposium on Cavitation

Mirshahi, M.^1 ; Yan, Y.^1 ; Nouri, J.M.^1

City University London, Northampton Square, EC1V 0HB, United Kingdom^1

关键词: Internal combustion;    Liquid breakup;    Mie scattering;    Multi-hole injectors;    Nozzle exits;    Primary breakups;    Spark ignition;    Spray cone angle;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012093/pdf
DOI  :  10.1088/1742-6596/656/1/012093

来源: IOP

【 摘 要 】

The importance of cavitation inside multi-hole injectors for direct injection internal combustion (IC) engineshas been addressed in many previous investigations. Still, the effect of cavitation on jet spray, its stability and liquid breakup and atomisation is not yet fully understood. The current experimental work aims to address some of these issues. It focuses on the initiation and development of cavitation inside a 7× enlarged transparent model of a symmetric 6-hole spark ignition direct injection (SIDI) injector and quantifies the effect of cavitation on near-nozzle spray cone angle and stability utilising high speed Mie scattering visualisation. The regions studied include the full length of the nozzle and its exitjet spray wherethe primary breakup takes place.