Experimental investigation of nozzle aspect ratio effects on underexpanded hydrogen jet release characteristics

Most experimental investigations of underexpanded hydrogen jets have been limited to circular nozzles in an attempt to better understand the fundamental jet-exit flow physics and model this behaviour with pseudo source models. However, realistic compressed storage leak exit geometries are not always...

Full description

Saved in:
Bibliographic Details
Published in:International journal of hydrogen energy 2014-12, Vol.39 (35), p.20331-20338
Main Authors: RUGGLES, A. J, EKOTO, I. W
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Aspect ratio
Circularity
Dispersions
Energy
Equivalence
Exact sciences and technology
Fuels
Hydrogen
Hydrogen storage
Hydrogen-based energy
Nozzles
Rayleigh scattering
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Most experimental investigations of underexpanded hydrogen jets have been limited to circular nozzles in an attempt to better understand the fundamental jet-exit flow physics and model this behaviour with pseudo source models. However, realistic compressed storage leak exit geometries are not always expected to be circular. In the present study, jet dispersion characteristics from rectangular slot nozzles with aspect ratios from 2 to 8 were investigated and compared with an equivalent circular nozzle. Schlieren imaging was used to observe the jet-exit shock structure while quantitative Planar Laser Rayleigh Scattering was used to measure downstream dispersion characteristics. These results provide physical insight and much needed model validation data for model development.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2014.04.143