【摘要】 主要研究开口圆管内的非线性振荡。圆管受迫端由一活塞驱动，活塞为小谐波振荡，另一端为完全开口状态。理论和实验均发现存在非线性现象。实验中还发现活塞激振频率和管内气体的固有频率接近时会发生共振，有强烈的非线性效应。同时在管口附近产生强烈的整流效应。发现利用此效应对水流有较好的雾化功能。更多还原

【Abstract】 In this paper, the problems of the forced nonlinear gas oscillation in open tubes are studied theoretically and experimentally.The gas oscillations are produced by small amplitude oscillations of a piston at one end of the tube. The other end is a completely open mouth. The nonlinear phenomenon is found in theoretical and experimental investigations. When the excitation frequencies of the piston near the resonance frequencies of the open tube in the experiment, the investigations may find the facts of nonlinear effects, which shock waves are emitted fromthe open end. Meanwhile, there is a high "rectification" (streaming effects) out of open mouth. In order to research the advantage to water atomization, laser mearsuring system (4F-system) is used. The researches find water stream is atomized into very small partical which has size of 10 millimicron.更多还原