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国际能源材料和化学驱动期刊
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN 打印: 2150-766X
ISSN 在线: 2150-7678

国际能源材料和化学驱动期刊

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v4.i1-6.720
pages 774-782

MATHEMATICAL MODELING OF OPERATION OF AN ACOUSTIC DAMPER WITH GAS IN ITS INTERNAL CAVITY

N. G. Alkov
Keldysh Research Center, Moscow, Russia

ABSTRACT

A mathematical model has been developed of operation of an acoustic damper, based on Helmholtz's resonator principles, when a gas comes into its internal cavity and flows out through passages. Such an acoustic damper rather effectively suppresses oscillations in the chemical propulsion. The purposeful arrangement of a supply of gas with given properties into the internal cavity of the acoustic damper enables considerable decrease in the dimensions of the damper, thus providing its efficient use to suppress low - frequency oscillation. A solid propellant grain, placed in the cavity of the acoustic damper, can be used as the gas mass source.
The operation of the acoustic damper has been analysed based on the model proposed. The experimentally-observed effect of a significant increase in the efficiency of operation of the acoustic damper with increase in the velocity of the steady - state flow through the damper passages has been shown to be related to increase in friction in the passages, and the threshold velocity of the steady - state flow, at which this effect appears, has been shown to be determined by equality of the velocities of the pulsation and steady- state flows. The use of a solid propellant as a gas mass source in the damper cavity results in more efficient operation of the damper.


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