Video Tutorials TV: Helical Instability in an Underexpanded Impinging Jet Videos

Added: Nov 19, 2008

From: adamrisborg

Duration: 0:7

Shadowgraph images captured at 1,000,000 frames per second show an underexpanded impinging jet of air with a nozzle pressure ratio (nozzle stagnation pressure divided by ambient pressure) of NPR=4.5, and non-dimensional impingement distance of Z/D=3 (Where Z is the impingement distance and D is the nozzle diameter). At this ratio the jet is influenced by a helical instability mode.Laboratory for Turbulence Research in Aerospace and Combustion, Department of Aerospace and Mechanical Engineering, Monash University.

Channel: Tech

Tags: axial  impinging  instability  jet  physics  underexpanded 

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