LOW-SPEED ALTITUDE TUNNEL WITH REDUCED FLOW PULSATION CHARACTERISTICS IN OPERATING SECTION

摘要

FIELD: engines and pumps.;SUBSTANCE: invention aims at reducing pulsation of low-speed flow in the tunnel operating section. Proposed tunnel comprises inlet contractor with prechamber, set of anti-turbulence screens, tapered nozzle, operating section and anti-turbulence elements. The latter represent means designed to kill vortex structures are arranged in outer turbulence boundary layer between tunnel operating section beginning and tested object location.;EFFECT: ruling out effects of alternating outer boundary of turbulence layer on intensity of flow pulsations in vortex core.;2 dwg