The spray characteristics of an unlike-doublet impinging-jet is investigated in this work. The working fluids are purified civil water and 95% alcohol-water solution. Impingement angle is 60°. The injector is made of stainless steel and with orifice diameter of 0.5mm. Results show that spray patterns of the unlike-doublet impinging-jet are quite different to that of like-doublet. That is caused by difference in physical properties of the two impinging jets. Mean drop size, measured by using a light diffraction particle sizer, has a peak value along the axis through the impingement point. And an asymptotic value of 50 μm in drop size is approached when jet velocity is elevated high enough, that is, the same as the like-doublet impinging-jet. The variation of deviation angle with jets momentum ratio is quite a match with the theoretical derivation. Results of mixture ratio show that jets will penetrate through each other at the impingement point.
All Science Journal Classification (ASJC) codes
- Aerospace Engineering