Volume 8, 2016Progress in Propulsion Physics
|Page(s)||75 - 94|
|Section||Liquid and electric space propulsion|
|Published online||06 July 2016|
Cryogenic oxygen jet response to transverse acoustic excitation with the first transverse and the first combined longitudinal-transverse modes
Deutsches Zentrum für Luft- und Raumfahrt (DLR) Institute of Space Propulsion Lampoldshausen, Hardthausen 74239, Germany
The intact length of the dense oxygen core from an oxygen-hydrogen shear coaxial rocket injector was measured. The measurements were made in a rectangular rocket combustor with optical access and acoustic forcing. The combustor was operated at chamber pressures of 40 and 60 bar, with either ambient temperature or cryogenic hydrogen. The multielement injection spray is subjected to forced transverse gas oscillations of two different acoustic resonance modes; the first transverse (1T) mode at 4200 Hz and the first combined longitudinal-transverse (1L1T) at 5500 Hz. Intact core length is measured from high-speed shadowgraph imaging. The dependence of intact core length with increasing acoustic amplitude is compared for the two modes of excitation.
© Owned by the authors, published by EDP Sciences, 2016