Abstract
In this paper, vibration mitigation of combustion oscillation using several resonators is investigated. First, test apparatus are made. Using the apparatus, the frequencies and mode shapes of the combustion oscillation are checked. Then based on the result, the positions of the resonators are determined. Second, the combustion oscillation is produced for various conditions. Then, we attempt to mitigate the vibration by using two Helmholtz resonators and one side branch resonator. The effects of the resonators on equivalent ratio and combustion chamber length are investigated. We investigate the relation between the volume of the capacities of the resonators and the frequencies of the combustion oscillation. Possibility of the automatic tuning of the combustion oscillation is discussed.
