270 - Experimental methods of investigations of the role of a gas vortex motion in the mechanism maintaining acoustic oscillations
Samsonov V.
Abstract
The influence of the vortex gas motion near the 'singing' flame on the excitation of the acoustic oscillations in vertical resonator-tube is discussed. It is shown that the vortex structures in the products of burning lead to a decrease in thermal flux in combustion zone of the flame. The value of the energy of rotational motion determines the mechanism maintaining thermal autooscillations. The experimental methods for measuring the vortex gas flow energy distribution along the resonator-tube are proposed. The explanation of the hysteresis behavior of the dependence of the energy of gas vortex motion on the heat-source power is proposed. The results demonstrating the influence of the acoustic oscillations on the burning rate of condensed fuels are presented. The influence of the forced convective flow and free gravitational convection on the sound power of the 'singing' flame is discussed.
Citation
Samsonov V.: Experimental methods of investigations of the role of a gas vortex motion in the mechanism maintaining acoustic oscillations, CD-ROM Proceedings of the Thirtheenth International Congress on Sound and Vibration (ICSV13), July 2-6, 2006, Vienna, Austria, Eds.: Eberhardsteiner, J.; Mang, H.A.; Waubke, H., Publisher: Vienna University of Technology, Austria, ISBN: 3-9501554-5-7
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