Density Wave Instability of Supercritical Kerosene in Active Cooling Channels of Scramjets

Ning Wang; Jin Zhou; Yu Pan; Hui Wang

doi:10.4028/www.scientific.net/AMM.321-324.293

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 321-324Density Wave Instability of Supercritical Kerosene...

Density Wave Instability of Supercritical Kerosene in Active Cooling Channels of Scramjets

Abstract:

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.

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Periodical:

Applied Mechanics and Materials (Volumes 321-324)

Pages:

293-298

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.321-324.293

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Online since:

June 2013

Authors:

Ning Wang, Jin Zhou, Yu Pan, Hui Wang

Keywords:

Active Cooling, Density Wave, Instability, Scramjets

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