PIV measurements on an air blast atomiser

Suriyanarayanan, P and Venkatakrishnan, L (2008) PIV measurements on an air blast atomiser. In: Proceedings of the 12th Asian Congress of Fluid Mechanics, 18-21 Aug 2008, Daejeon, Korea.

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Abstract

The flow field of a typical airblast injector was studied using PIV. The air-water flow13; field was documented with 2D PIV and the air-alone flow at four streamwise locations with stereo PIV.13; The results show that for a fixed air-water mass ratio, volume flow rate has a negligible effect on the13; dispersion angle, but a considerable effect on the mean velocity field. The stereo PIV measurements13; indicate the presence of a region of reversed flow at the injector centerline which initially increases and13; persists downstream though considerably reduced in size and magnitude. This is because the large swirl13; angle of the air slots creates a highly swirling flow which sets up a recirculation zone due resulting in the13; formation of a toroidal vortex near the exit. The findings have significant implications for combustor13; design and can be used to optimize airblast injectors for efficient fuel mixing.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Air blast atomizer;Airblast injector
Subjects: AERONAUTICS > Aeronautics (General)
Depositing User: Users 11 not found.
Date Deposited: 07 Apr 2010
Last Modified: 17 Jun 2010 09:58
URI: http://nal-ir.nal.res.in/id/eprint/5278

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