Gas Efficient Liquid Atomization Using Micro-Machined Spray Nozzles

Paper #:
  • 960859

Published:
  • 1996-02-01
Citation:
Snyder, H. and Reitz, R., "Gas Efficient Liquid Atomization Using Micro-Machined Spray Nozzles," SAE Technical Paper 960859, 1996, https://doi.org/10.4271/960859.
Pages:
13
Abstract:
Improved atomization is important in fuel injection applications since atomization influences fuel-air mixing and vaporization rates. The present paper explores the use of low pressure gas/air injection and methods to achieve a dispersed two-phase flow to enhance the atomization process. Gas-driven twin-fluid atomization has been achieved by combining X-ray lithographic/micro-machining technology to mechanically disperse a driving gas into a liquid to be sprayed. This technique forces the gas through a designed pattern of micron sized holes thereby yielding a field of micro-bubbles immediately upstream of the < I mm. diameter discharge orifice. Precise control of both uniformity of hole diameter and inter-hole spacing is critical to producing a well dispersed bubbly flow. The results show that the method of gas injection influences the liquid breakup process. Results are given for steady-flow atomization with low pressure injection into ambient air.
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