【摘要】 本文用Pcdley集中参数模型在汁及重力和喉口位置的情形下,证明了自激振荡在P-Q曲线的正斜率区域内也会出现,从而扩充了Pedley的理论结果,利用水平可塌陷管模型进行实验,证实了本文理论结果的正确性,同时表明,可塌陷管内自激振荡的出现和下游阻抗的大小有着非常密切的关系。更多还原

【Abstract】 Considering the gravitational effect and the variation of the position of the narrowest part of the collapsible tube, we have proved that the self-excited oscillations may occur in the positive slope of P-Q characteristic by using Pedley’s[1] lumped parameter model, this extends the results of Pedley[1]. The conclusion is further proved by the experimental results of the flow in horizontal collapsible tube. The experimental results also show that the self-excited oscillations in collapsible tube is closely related to the downstream resistance.更多还原