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Title: Mixing characteristics of a ducted, elliptical jet with dump

Mixing between elliptical ducted air-jets with dump and nitrogen radially injected through the duct walls was experimentally studied using hot-wire anemometry and gas-sampling techniques. Mixing was considerably increased when the air-jet was issued from elliptical relative to circular jet-exit cross-sections. Elliptical jets issued from orifices provided better mixing than issued from pipes. Additional mixing enhancement was achieved when the elliptical jets were acoustically forced by excited resonant pressure waves of the duct. The mean and turbulence velocity measurements provided insight into the mechanism of the observed mixing enhancement.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
5926364
Report Number(s):
CONF-8606184-
Resource Type:
Conference
Resource Relation:
Conference: 22. joint propulsion conference, Huntsville, AL, USA, 16 Jun 1986
Publisher:
American Institute Aeronaut and Astronaut,New York, NY
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; FUEL INJECTION SYSTEMS; MIXING; MONITORING; ACOUSTICS; AIR; AIR FLOW; DUCTS; ELLIPTICAL CONFIGURATION; FLOW RATE; FUEL-AIR RATIO; GAS ANALYSIS; HOT WIRE ANEMOMETERS; JETS; NITROGEN; RESONANCE; TURBULENCE; ANEMOMETERS; CONFIGURATION; ELEMENTS; FLUID FLOW; FLUIDS; FUEL SYSTEMS; GAS FLOW; GASES; MEASURING INSTRUMENTS; NONMETALS 330603* -- Vehicle Design Factors-- Engine System