The effects of Reynolds number and Richardson number on the structure of a vertical co-flowing buoyant jetThe behavior of a vertical jet of helium issuing into a coflow of air at a fixed exit velocity ratio of 2.0 has been studied for various Reynolds numbers and Richardson numbers. It is found that the transition to turbulence is very sudden and that the point of transition moves closer to the jet exit as either the Reynolds number or the Richardson number increases. Under most of the conditions considered, the flow exhibits a strong periodic longitudinal instability whose wavelength increases with Richardson number.
Document ID
19890054664
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Subbarao, E. R. (Lockheed Aeronautical Systems Co. Burbank, CA, United States)