Experimental Study of Flow Oscillation in a Rectangular Jet-Driven Tube

Several papers, mainly of a theoretical nature, have been published on the oscillatory flow in a Hartmann-Sprenger tube. Quantitative exploration of the flow field has proved difficult and details are lacking. In the present work, using a rectangular tube, synchronous shadow-photography has been applied to visualize the flow field during stable oscillatory flow. The measurement of pressure has also been made for the case of steady flow when both ends of the tube are open. From these experimental results the necessary conditions for starting and maintaining a stable oscillatory flow in an H-S tube have been established.