Active control of reheat buzz
Active control of reheat buzz
复制标题
主动控制再加热蜂鸣声
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
G. Bloxsidge
中科院分区：
文献类型：
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作者：
A. Dowling;N. Hooper;P. Langhorne;G. Bloxsidge
再热嗡嗡声是一种低频燃烧不稳定性，涉及火焰锚定的管道内纵向压力波的传播。主动控制已成功地应用于这种不稳定性。控制器改变了上游声学边界条件，从而改变了管道内的能量平衡。发现控制使燃烧不稳定引起的压力谱中的峰值降低了20 dB。整个0-800 hz带宽的声能降低到其未控制值的10%左右。并与数值计算结果进行了比较。
Reheat buzz is a low-frequency combustion instability involving the propagation of longitudinal pressure waves inside a duct in which a flame is anchored. Active control has been successfully applied to this instability. The controller alters the upstream acoustic boundary condition and thereby changes the energy balance in the duct. Control is found to reduce the peak in the pressure spectrum resulting from combustion instability by 20 dB. The acoustic energy in the whole 0-800-Hz bandwidth is reduced to about 10% of its uncontrolled value. A comparison with numerical calculations is presented.