Abstract
This paper presents results of high-speed co-flow jets from orifices with various annular gaps
tested with a single feed system. The co-flow models consisted of a primary orifice of 10 mm
diameter surrounded by 12 secondary orifices of 3 mm diameter each, positioned in an annular
fashion around the primary orifice. The annular gap between the edge of primary orifice and the
secondary orifices were 1.5 mm, 2.5 mm, 3.5 mm and 4.5 mm. The co-flow is found to reduce the
potential core of the primary jet at all Mach numbers. The 4.5 mm annular gap is found to be more efficient in promoting the mixing of the primary jet.
tested with a single feed system. The co-flow models consisted of a primary orifice of 10 mm
diameter surrounded by 12 secondary orifices of 3 mm diameter each, positioned in an annular
fashion around the primary orifice. The annular gap between the edge of primary orifice and the
secondary orifices were 1.5 mm, 2.5 mm, 3.5 mm and 4.5 mm. The co-flow is found to reduce the
potential core of the primary jet at all Mach numbers. The 4.5 mm annular gap is found to be more efficient in promoting the mixing of the primary jet.
| Original language | English |
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| Title of host publication | Proceedings of 34th National Conference on FMFP 2007 |
| Publication status | Published - Dec 2007 |