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Power measurement for an acoustically pulsed jet flow

Previous work showed that acoustic modulation of the dilution-air jets of a small tubular combustor improved performance in that selective and progressive control of the exit plane temperature distribution was possible. Further work on acoustically pulsed free-jet mixing showed that the entrainment coefficient of the jet, and therefore mixing, could be considerably increased, by up to 6 times. The effects correlated well with the amplitude of the jet pulsation velocity U e . This new work therefore attempts to relate the jet pulsation velocity amplitude to the acoustic power modulating the jet flow thereby leading to a more practical and direct correlation between mixing and acoustic power