A novel plasma heater for auto-ignition studies of turbulent non-premixed flows

A novel plasma heater for auto-ignition studies of turbulent non-premixed flows In this paper, the development and characterization of a novel test rig for auto-ignition (AI) studies of a fuel jet propagating into a hot turbulent co-flow is reported. The test rig, based on microwave plasma heating, is capable of achieving co-flow temperatures up to 1300 K and velocities up to 40 $$\hbox {ms}^{-1}$$ ms - 1 . Important boundary conditions at nozzle exit such as temperature, species, and velocity field were determined to prove the capabilities and limitations of the test rig. Liftoff height (LOH) measurements of $$\hbox {CH}_4$$ CH 4 , $$\hbox {C}_2\hbox {H}_4$$ C 2 H 4 , and $$\hbox {CH}_{4}/\hbox {H}_{2}$$ CH 4 / H 2 jets, propagating into a turbulent heated air co-flow, were taken using chemiluminescence imaging. Effects of the temperature and Reynolds number (Re) of co-flow and jet were also studied. Results showed that the flame stabilization mechanism is supported substantially by AI rather than pure flame propagation. While the co-flow temperature dominates the AI process, the Re and temperature of the jet just have a small impact on the LOH. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

A novel plasma heater for auto-ignition studies of turbulent non-premixed flows

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2015 by Springer-Verlag Berlin Heidelberg
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-015-2059-7
Publisher site
See Article on Publisher Site

Abstract

In this paper, the development and characterization of a novel test rig for auto-ignition (AI) studies of a fuel jet propagating into a hot turbulent co-flow is reported. The test rig, based on microwave plasma heating, is capable of achieving co-flow temperatures up to 1300 K and velocities up to 40 $$\hbox {ms}^{-1}$$ ms - 1 . Important boundary conditions at nozzle exit such as temperature, species, and velocity field were determined to prove the capabilities and limitations of the test rig. Liftoff height (LOH) measurements of $$\hbox {CH}_4$$ CH 4 , $$\hbox {C}_2\hbox {H}_4$$ C 2 H 4 , and $$\hbox {CH}_{4}/\hbox {H}_{2}$$ CH 4 / H 2 jets, propagating into a turbulent heated air co-flow, were taken using chemiluminescence imaging. Effects of the temperature and Reynolds number (Re) of co-flow and jet were also studied. Results showed that the flame stabilization mechanism is supported substantially by AI rather than pure flame propagation. While the co-flow temperature dominates the AI process, the Re and temperature of the jet just have a small impact on the LOH.

Journal

Experiments in FluidsSpringer Journals

Published: Sep 22, 2015

References

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