Abstract
This paper presents a novel experiment in an atmospheric cylindrical single-jet combustor, designed to exhibit high-frequency radial thermoacoustic instabilities. The experimental configuration was designed based on an a priori set of comprehensive numerical investigations, the experiments were conducted with pressure and temperature probes, and large-eddy simulations of the final experiments were performed. The results from simulation and experiment were compared and showed reasonable agreement in the amplitude, frequency, and mode shape of the self-excited instability in the unstable operating point and no thermoacoustic oscillations in the stable operating point. Various parameters have been varied to assess their effect on thermoacoustics, including variations of mass flow rate, of equivalence ratio, and combustor wall temperatures. For the unstable cases, direct effect of pressure on density was found to drive the thermoacoustic oscillations.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
