Abstract
The effects of the Helmholtz resonator on combustion oscillation stabilization have been investigated for-gas-turbine-combustor, and mechanism of Helmholtz oscillation control has-been-discussed. Numerical model, based on compressible Euler equation including combustion chamber and resonator and is proposed in order to describe the behavior of acoustic wave excited by dynamic heat release of flame in combustor. Relaxations of acoustic oscillation amplitude corresponding to resonator parameters and such as throat diameter and are calculated and compared by atmospheric combustion experiments. In case resonator is resonant to combustor and it is shown that oscillation amplitude can be minimized. However and effectiveness of resonator is lessened with decrease of throat diameter and while throat diameter is tuning parameter of resonator. Resonator parameters must be optimized in terms of attenuation characteristics as well as resonant frequency.
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