PIV investigation of the 3D instantaneous flow organization behind a micro-ramp in a supersonic boundary layer

Sun, Z., Schrijer, F. F. J., Scarano, F. & van Oudheusden, B. W. (2012). PIV investigation of the 3D instantaneous flow organization behind a micro-ramp in a supersonic boundary layer. Paper presented at the 28th International Symposium on Shock Waves, 17-07-2011 - 22-07-2011, Manchester, UK. doi: 10.1007/978-3-642-25685-1_63

Abstract

The flow field resulting from a single micro-ramp in a Ma=2.0 supersonic boundary layer is investigated using tomographic particle image velocimetry (Tomo-PIV). The measurements were carried out within two volumes behind the micro-ramp. Mean flow characteristics are analyzed, evidence of the streamwise vortex pair is given. In the instantaneous flow, a Kelvin-Helmholtz (K-H) instability developing in the wake of the element is revealed, and the K-H vortices are further identified. A conceptual model is provided to describe the instantaneous flow organization generated by a single micro-ramp.

Publication Type:	Conference or Workshop Item (Paper)
Additional Information:	The final publication is available at Springer via http://dx.doi.org/10.1007/978-3-642-25685-1_63
Subjects:	T Technology > TJ Mechanical engineering and machinery
Departments:	School of Science & Technology > Engineering