Measurements of macrosonic standing waves in oscillating closed cavities
Measurements of macrosonic standing waves in oscillating closed cavities
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DOI：
10.1121/1.423306
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发表时间：
1997-11
影响因子：
2.4
通讯作者：
C. Lawrenson;B. Lipkens;T. S. Lucas;D. K. Perkins;Thomas W. Van Doren
中科院分区：
文献类型：
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作者：
C. Lawrenson;B. Lipkens;T. S. Lucas;D. K. Perkins;Thomas W. Van Doren
本文给出了在振荡封闭腔中气体中的宏声驻波的测量结果。证明了压力波形对空腔形状的强烈依赖性。利用这种依赖性来提供谐波相位和振幅的控制，从而避免冲击并使谐振波形能够达到宏声波压力。这种依赖性的开发被称为共振宏声波合成（RMS）。功率通过用线性致动器（整个谐振器驱动器）振荡而传递到腔。驻波超压超过340%的环境压力证明RMS腔，相比之下，在圆柱形谐振器中观察到的最大超压为17%。RMS腔中观察到的最大压力与最小压力之比为27，而圆柱体为1.3。测量示出了四个轴对称腔形状：圆柱体，圆锥体，角锥混合，灯泡。用氮气、丙烷或制冷剂R-134a（1，1，1，2-二氯乙烷）填充腔。物理...
Measurements of macrosonic standing waves in gases in oscillating closed cavities are shown. The strong dependence of the pressure waveform upon cavity shape is demonstrated. This dependence is exploited to provide control of harmonic phase and amplitude, thus avoiding shocks and enabling resonant waveforms to reach macrosonic pressures. The exploitation of this dependence is referred to as resonant macrosonic synthesis (RMS). Power is delivered to the cavity by oscillating it with a linear actuator (entire resonator drive). Standing wave overpressures in excess of 340% of ambient pressure are demonstrated in RMS cavities, compared to maximum overpressures of 17% observed in cylindrical resonators. Ratios of maximum to minimum pressures of 27 were observed in RMS cavities compared to 1.3 for cylinders. Measurements are shown for four axisymmetric cavity shapes: cylinder, cone, horn-cone hybrid, and bulb. Cavities were filled with nitrogen, propane, or refrigerant R-134a (1,1,1,2-tetrafluoroethane). Physic...