Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30114
Density Wave Instability of Supercritical Kerosene in Active Cooling Channels of Scramjets

Authors: N. Wang, Y. Pan, J. Zhou, J. Lei, X. Z. Yang


Experimental investigations were made on the instability of supercritical kerosene flowing in active cooling channels. Two approaches were used to control the pressure in the channel. One is the back-pressure valve while the other is the venturi. In both conditions, a kind of low-frequency oscillation of pressure and temperature is observed. And the oscillation periods are calculated. By comparison with the flow time, it is concluded that the instability occurred in active cooling channels is probably one kind of density wave instability. And its period has no relationship with the cooling channel geometry, nor the pressure, but only depends on the flow time of kerosene in active cooling channels. When the mass flow rate, density and pressure drop couple with each other, the density wave instability will appear.

Keywords: scramjets, active cooling, instability, density wave

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1209


[1] J. K. Xu, D. L. Jia. Boling Heat Transfer and Gas-Liquid Two PhaseFlow. Beijing: nuclear Power Press, 2001.W.-K. Chen, Linear Networks and Systems (Book style). Belmont, CA: Wadsworth, 1993, pp. 123-135.
[2] Z. Q. Lu. Two phase flow and boiling heat transfer. Beijing: Tsinghua University Press, 2002
[3] T. K. Chen, J. G. Jing, and Y. S. Luo. Investigation on the two-phase flow instabilities of parallel tubes. Journal of Engineering Thermophysics. vol 23, no 1, Jan. 2002.
[4] B. Hitch, M. Karpuk. Experimental Investigation of Heat Transfer and Flow Instabilities in Supercritical Fuels. AIAA 1997-3043
[5] L. L. Diane, L. M. Michael, and C. B. Donald. Investigation of Instabilities and Heat Transfer Phenomena in Supercritical Fuels at High Heat Flux and Temperatures. AIAA 2000-3128.
[6] J. F. Ely, M. L. Huber. NIST Standard Reference Database 4-NIST Thermophysical Properties of Hydrocarbon Mixtures. National Inst. of Standards, Gaithersburg, MD, 1990.