Investigation of the Dynamics of the Jet Mixing Layer
Abstract
The objective of this investigation was to study the dynamics of the jet-mixing layer using a unique experimental apparatus in conjunction with Proper Orthogonal Decomposition (POD) techniques. The experiments utilize 138 hot-wires in the mixing layer of an axisymmetric jet to simultaneously resolve the instantaneous stream wise velocity field at all locations. The POD is then applied to a double Fourier transform in time and azimuthal direction of the two-point velocity correlation tensor. Measurements covered all the potential core region of the jet from 2 to 6 diameters downstream at various high Reynolds numbers, 78, 400 to 156, 800, and the far field region from 21 to 69 diameters downstream, at Reynolds numbers from 40,000 to 84,700. The results both illustrate the limitations of the previous work, and point the way for a significant breakthrough in our understanding of free shear flows.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 17, 2001
- Accession Number
- ADA397742
Entities
People
- Stephan Gamard
- William K. George
Organizations
- University at Buffalo