NDLI: Jet Injection Into Swirling Crossflow for Improved Mixing and Combustion

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	David, G. Lilley
Copyright Year	2002
Abstract	The aerodynamics benefits of lateral jet injection into swirling crossflow have long been recognized and used by combustion engineers. Studies are reported here on experimental and theoretical research on lateral jet injection into typical combustor flowfields for low-speed turbulent swirling flow conditions in the absence of combustion. The main flow is air in a round cross-sectioned plexiglass tube. The degree of swirl can be varied by varying the angles of the blades of an annular swirler, located upstream of the test section. Lateral jet injection is normal to the main airflow, from round-sectioned nozzles. Either a single lateral jet or two diametrically opposed jets are used for this secondary injection of air into the main airflow. The principal aim is to investigate the trajectory, penetration and mixing efficiency of the lateral injection. Flow visualization with helium-filled soap bubbles and multi-spark ionized path techniques, five-hole pitot probe time-mean velocity measurements, and single-wire time-mean velocity and turbulence data (normal and shear stress) have been obtained in the experimental research program. A fully three-dimensional computer code with two-equation turbulence model has been developed and used in the theoretical research program. The present paper reviews the activity and highlights key results obtained during the study.
Sponsorship	Power Division
Starting Page	881
Ending Page	888
Page Count	8
File Format	PDF
ISBN	0791836177
DOI	10.1115/IJPGC2002-26178
e-ISBN	0791836010
Conference Proceedings	2002 International Joint Power Generation Conference
Language	English
Publisher Date	2002-06-24
Publisher Place	Scottsdale, Arizona, USA
Access Restriction	Subscribed
Subject Keyword	Computers Turbulence Blades Swirling flow Aerodynamics Combustion Helium Wire Flow (dynamics) Air flow Bubbles Flow visualization Shear stress Trajectories (physics) Jets Nozzles Engineers Combustion chambers Velocity measurement Probes
Content Type	Text
Resource Type	Article

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