Shock-flame interaction in a cylindrical chamber.

is produced toward the axis of the vortex along the wall. Since the fluid carried inward cannot accumulate at the attachment points without producing an unsteady change in the flow structure, the point of attachment at one end moves to a region where the ambient pressure is lower than it is at the other end and thus establishes a steady axial flow that removes the fluid brought to the axis at the high-pressure end. In the present case, a suitably low pressure for venting in this way is found near the edge of the hole on either side of the longitudinal axis and somewhat downstream of the center of the hole. Fig. 1 Streak photograph of a cylindrical flame taken across a 2-mm-wide, diametral slit. Equimolar acetylene-oxygen mixture at an initial pressure of 100 mm Hg is used.