Critical Design Parameters for Pylon-Aided Gaseous Fuel Injection Upstream of a Flameholding Cavity (Paperback)

The Air Force Institute of Technology and the AFRL are investigating means to increase the efficiency of fuel-air mixing into supersonic flow. Previous work has shown much promise in increasing the penetration and mixing of a fuel-air mixture into the freestream by injecting fuel behind small triangular pylons. Pylon-aided fuel injection has also shown to lift the fuel plume off the combustor floor; this floor-gap prevents the ignition of fuel seeded in the boundary layer. In this paper twenty-one pylons of varying widths, heights, and lengths were examined in four specific test matrices within a CFD environment. Pylons in test matrix 1 maintained a constant height and length while varying the pylon width. Test matrix 2 and 3 varied the absolute height of two different pylons from test matrix 1; scaling the pylons height and maintaining a constant leading edge wedge angle and width to height ratio. The final test matrix varied the length of pylons while keeping the height and width fixed. Pylons with a width less than 3-diameters featured a fuel plume dominated by two sets of counter-rotating vortices.

General

Imprint:	Biblioscholar
Country of origin:	United States
Release date:	October 2012
First published:	October 2012
Authors:	Mitchell R Pohlman
Dimensions:	246 x 189 x 8mm (L x W x T)
Format:	Paperback - Trade
Pages:	146
ISBN-13:	978-1-249-59417-8
Categories:	Books > Social sciences > Education > General
LSN:	1-249-59417-0
Barcode:	9781249594178

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