The atomization and mixing of like-doublet water impinging jets at different ambient pressures (1.0 bar, 6.8 bar and 10.0 bar) and momentum fluxes of the jets were studies in this research. The orifices of the injector (φ=0.3 mm and 0.4 mm) were kept the same and arranged to have impinging angle at +30°/-30°. The momentum flux ratio of the two jets was kept unity. PLIF (Planar Laser Induced Fluorescence) technique and Malvern Spraytec particle size analyzer were adopted to observe the 2-dimensional mass distribution and SMD of the water sprays. In the higher ambient pressure and the larger orifice size experiments, because the jet was less stable, the impinging jets were broken up more uniformly. Besides, the maximum and the local minimum penetration percentage (P.P.) occurred at relatively lower momentum fluxes. For the higher aerodynamic instability, the decrease of the mean droplet size of the sprays near the impinging point was also observed at the higher ambient pressure. This study showed that the ambient pressure and orifice size directly influence the disintegration of the impinging jets and the droplet size distributions of the sprays. And the mixing behavior of the impinging jets is closely related to the instability of the liquid jet before impingement.
|Publication status||Published - 2012|
|Event||12th International Conference on Liquid Atomization and Spray Systems, ICLASS 2012 - Heidelberg, Germany|
Duration: 2012 Sep 2 → 2012 Sep 6
|Conference||12th International Conference on Liquid Atomization and Spray Systems, ICLASS 2012|
|Period||12-09-02 → 12-09-06|
All Science Journal Classification (ASJC) codes
- Surfaces, Coatings and Films