Please use this identifier to cite or link to this item:
|Scopus||Web of Science®||Altmetric|
|Title:||Coupling behaviour of LOx/H₂ flames to longitudinal and transverse acoustic instabilities|
|Other Titles:||Coupling behaviour of LOx/H(2) flames to longitudinal and transverse acoustic instabilities|
|Citation:||48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012, 2012, pp.1-18|
|Publisher:||Aerospace Research Central|
|Conference Name:||48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit (30 Jul 2012 - 1 Aug 2012 : Atlanta, Georgia)|
|Justin S. Hardi, Scott K. Beinke, Michael Oschwald, and Bassam B. Dally|
|Abstract:||A rectangular combustor with acoustic forcing was used to study flame-acoustic interaction under injection conditions which are representative of industrial rocket engines. Hot-fire tests using liquid oxygen and gaseous hydrogen were conducted at pressures of 40 and 60 bar, which are sub- and supercritical conditions respectively for oxygen. To our knowledge, acoustic forcing has never before been conducted at pressures this high in an oxygen-hydrogen system. Examined samples of hydroxyl-radical emission imaging, collected using a high-speed camera during periods of forced acoustic resonance, show significant response in the multi-injection element flame. Transverse acoustic velocity causes shortening of the flame, concentrating heat release near the injection plane. Fluctuating acoustic pressure causes in-phase fluctuation of the emission intensity. Based on these observations, a theorized flame-acoustic coupling mechanism is offered as an explanation for how naturally occurring high frequency combustion instabilities are sustained in real rocket engines. © 2012 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.|
|Description:||Document ID AIAA 2012-4087|
|Rights:||Copyright © 2012 by the American Institute of Aeronautics and Astronautics, Inc|
|Appears in Collections:||Aurora harvest 2|
Mechanical Engineering conference papers
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.