期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2018
卷号：7
期号：3
页码：2169
DOI：10.15680/IJIRSET.2018.0703031
出版社：S&S Publications
摘要：The experimental investigation into nature of major combustion instabilities, occurring inrocket thrustchambers, is presented in this paper. The study dealt mainly with the cold flow of gaseous oxygen, O2, as the oxidizerin a circular chamber and analyzing the significant oscillation modes. The apparatus for the experiment was exactlysimilar to a magnetic flowmeter assembly, which is generally used for studying the instabilities via determination ofpressure and velocity response function. The excitation frequency, responsible for generating the forced longitudinaloscillation, was varied from 1 kHz to 18 kHz using a direct current (DC) motor attached to a variable power supply.The major oscillatory modes at different excitation frequency were determined along with variation of pressurefluctuations with the change in mean chamber pressure. Power Spectrum analysis using the Fast Fourier Transform wasdone in order to determine the peak amplitude for the pressure fluctuation, at a mean chamber pressure of 60 psi. Thereal-time signal obtained using the Kulite high temperature pressure transducer was read and seen through theLabVIEW data acquisition software.
