National Center for Combustion Research and Development

Indian Institute Of Technology Madras & Indian Institute of Sciences, Bangalore
Response of a swirl-stabilized, premixed flame to transverse acoustics

Speaker : Dr. Aditya Saurabh has completed Dual degree from the Department of Aerospace Engineering, IIT Madras in 2010. He is a Research scientist at the Chair of Fluid Dynamics, 2010-present and PhD in Engineering Physics from TU Berlin

Date : 12-02-2018 4:30 PM - 5:30 PM
Venue: Aero / NCCRD Seminar Hall

Abstract :

Fame response to transverse acoustic fields has recently emerged as an important aspect concerning the phenomenon of thermoacoustic instability in annular gas turbine combustors. Only few studies exist on the subject and our understanding is consequently limited. Note that the annular combustors are a popular contemporary---most likely, also future---configuration for gas turbine combustors. Thus, research on the topic is of immediate practical interest. This talk is a summary of an experimental investigation of the response of a premixed, swirl-stabilized flame to acoustic forcing configurations that simulate acoustics fields experienced by flames in annular combustors. The investigation reveals that transverse acoustic velocity fluctuations have a non-trivial impact on flame response. Furthermore, the impact is dependent on the magnitude of transverse acoustic velocity, the phase of transverse fluctuations with respect to axial fluctuations, operating conditions, and even the inherent asymmetry of the flame.

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