Atomization Performance of an Atomizer with Internal Impingement

摘要

This paper describes the atomization performance of a newly designed atomizer with internal impinging mechanisms inside the atomizer. The spray drop size distribution was measured by a Malvern RT-Sizer. Results show that the Sauter mean diameter below 10 μ m has been achieved with GLR of 0.14. The minimum mean drop size can be lowered to 4.0 μ m under a test condition of the liquid pressure and gas pressure of 2.5bar and 3.5bar, respectively. This test suggests that extra fine atomization on the liquid phase can be achieved under low pressure conditions using this particular atomizer. Such performance cannot be easily achieved with the conventional nozzle design. Results also show that better atomization performance can be achieved by increasing the internal impinging angle. An empirical formula of SMD, in terms of atomization pressure and liquid injection pressure, is also present in this paper.