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Type: Journal article
Title: Low kinetic-energy loss oscillating-triangular-jet nozzles
Author: Lee, S.
Lanspeary, P.
Nathan, G.
Kelso, R.
Mi, J.
Citation: Experimental Thermal and Fluid Science, 2003; 27(5):553-561
Publisher: Elsevier Science Inc
Issue Date: 2003
ISSN: 0894-1777
Statement of
S. K. Lee, P. V. Lanspeary, G. J. Nathan, R. M. Kelso and J. Mi
Abstract: A visualisation experiment and measurements with a Pitot probe show that natural instability of a partially confined triangular jet can produce a continuously oscillating flow. The device which produces this flow consists of a triangular inlet orifice expanding into a short axisymmetric chamber. There is a small lip at the exit of the chamber. An oscillating-jet flow occurs over a wide range of chamber lengths and expansion ratios. The initial spreading angle of the jet flow is much larger than that of a basic turbulent jet flow. The external oscillating jet has preferred azimuthal directions which are aligned with the corners of the triangular orifice. Kinetic-energy loss coefficients of the oscillating triangular jet are significantly lower than those of an axisymmetric “precessing-jet” nozzle.
Keywords: Triangular orifice; Oscillating jet; Flow visualisation; Velocity decay rate; Low pressure drop; Loss coefficient
RMID: 0020030694
DOI: 10.1016/S0894-1777(02)00269-8
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Appears in Collections:Mechanical Engineering publications
Environment Institute Leaders publications

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