摘要
本文研究了低流速范围内突出式和陷落式圆柱形腔的流激自持振荡和驻波共振问题。根据大量实验数据，归纳出了适合于低流速情况陷落式和突出式腔的流体动力振荡频率公式，理论上考虑腔口辐射阻抗得到了圆柱腔的驻波共振频率公式，其理论值与试验值符合很好。着重研究了两种振荡的耦合共振，根据本文得出的两种振荡的频率公式，给出了圆柱形腔满足耦合共振条件时腔深和流速之间的关系，实测值与计算值符合很好。
The flow-induced self-sustaining oscillation and standing wave resonance of protruding and trap cavities are studied at the low speed range. By experiment, the formulae of frequency of nuid dynamic oscillation of trap and protruding cavities at low speed are suggested. The frequency formulae of standing wave resonance are introduced as considering the radiation impedance, the calculated values are in agreement with experimental data. The coupling resonance of the two kinds of oscillations is also studied. According to the two formulae of the two oscillations the relation between the cylindrical cavity depth and the flow speed is derived when the coupling resonance is occurring. These relation of coupling resonance are verified by the experimental data.
出处
《声学学报》
EI
CSCD
北大核心
1996年第4期439-456,共18页
Acta Acustica
基金
国家自然科学基金
