Acoustic instabilities control using Helmholtz resonators

摘要: Abstract The main focus of the present work is to evaluate performance Helmholtz resonators control acoustic instabilities inside combustion chambers. In stage this work, some tests were conducted with non-reactive flow chamber. This paper presents a methodology design and calculations theoretically determine damp instabilities, an experimental setup especially developed study in reactive flows, results for situation without flow. show that resonator has exceptional capacity oscillations frequency design; but, it narrow range actuation close frequency. addition, experiments presence can modify spectrum frequencies, cases amplifies oscillations, having velocity chamber considerable influence attenuation.