The work presented in this paper details preliminary low Reynolds numbers studies using Particle Image Velocimetry (PIV) to collect turbulence statistics and unsteady flow field information over a DARPA SUBOFF submarine model. The model configuration tested was an axisymmetric body without appendages and supported by a streamlined sting. Turbulent statistics were calculated both in time and space, hence increasing the effective sample size by an order of magnitude from 500 to about 5000 data points, in order to generate meaningful statistical data sets. Velocity vector fields, distribution measurements of axial and radial turbulence intensity, distribution measurements of turbulent shear, vorticity fields and flow visualizations in the wake region are presented for Reynolds numbers based on model length, Re, between 10 5 and 106, for 8 < x/D < 9 downstream from the tail of the submarine model.
All Science Journal Classification (ASJC) codes
- Aerospace Engineering