Drop size characteristics of forward angled injectors in subsonic cross flows

Venkat Iyengar, S and Sathiyamoorthy, K and Srinivas, J and Manjunath, P (2013) Drop size characteristics of forward angled injectors in subsonic cross flows. In: Proceedings of the ASME 2013 Gas Turbine India Conference (GTINDIA2013), 5-6 Dec 2013, Bangalore, Karnataka, India.

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Abstract

Cross flow fuel injection is a widely used approach for injecting liquid fuel in gas turbine combustors and afterburners due to the higher penetration and rapid mixing of fuel and the cross flowing airstream. Because of the very limited residence time available in these combustors it is essential to ensure that smaller drop sizes are generated within a short axial distance from the injector in order to promote effective mixing. This requirement calls for detailed investigations into spray characteristics of different injector configurations in a crossflow environment for identifying promising configurations. The drop size characteristics of a liquid jet issuing from a forward angled injector into a cross-flow of air were investigated experimentally at conditions relevant to gas turbine afterburners. A rig was designed and fabricated to investigate the injection of liquid jet in subsonic cross-flow with a rectangular test section of cross section measuring 50 mm by 70 mm. Experiments were done with a 10 degree forward angled 0.8 mm diameter plain orifice nozzle which was flush mounted on the bottom plate of test section. Laser diffraction using Malvern Spraytec particle analyzer was used to measure drops size and distributions in the near field of the spray. Measurements were performed at a distance of 70 mm from the injector at various locations along the height of the spray plume for a reasonable range of liquid flow rates as in practical devices.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Gas turbine combustors;Subsonic cross-flow;Laser diffraction;Liquid flow
Subjects: AERONAUTICS > Aeronautics (General)
AERONAUTICS > Aerodynamics
Depositing User: Ms. Alphones Mary
Date Deposited: 01 Jul 2014 04:16
Last Modified: 01 Jul 2014 04:16
URI: http://nal-ir.nal.res.in/id/eprint/11987

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