Characterization of spray structures formed during water injection into a free supersonic air jet

Document Type

Conference Proceeding

Publication Date

1-1-2019

Abstract

The interaction of a water jet with a free supersonic air jet results in the formation of a spray with characteristics different from a traditional jet in crossflow. The unbounded nature of the free supersonic jet and the presence of Mach diamonds in the flow contribute to the differences observed in the spray structure formed during the interaction of the two jets. This work utilizes non-intrusive diagnostics to study the interaction process and the resulting flow field. The spray generated by the interaction of a supersonic free air jet with water jet issued from three types of nozzles is studied. The nozzles include one that produces a coherent water jet, another that produces a fan-spray and a third that generates a full-cone spray. Diffused back-lit imaging using a laser light source and synchronized high-speed imaging is used to obtain frozen images of the spray. Volume illuminated high-speed imaging is used to track the spray penetration into the air jet. The measurements highlight unique features of the spray formation process and differences between the current observations and structures found in traditional jet-in-crossflow interactions are analyzed.

Publication Source (Journal or Book title)

AIAA Propulsion and Energy Forum and Exposition, 2019

This document is currently not available here.

Share

COinS