Natural and Induced Transition on a 7deg Half-Cone at Mach 6
Paper
| Paper/Presentation Title | Natural and Induced Transition on a 7deg Half-Cone at Mach 6 |
|---|---|
| Presentation Type | Paper |
| Authors | Masutti, Davide (Author), Pinna, Fabio (Author), Erkan, Gunaydinoglu (Author), Sopek, Tamara (Author) and Chazot, Olivier (Author) |
| Journal or Proceedings Title | Proceedings of the RTO-MP-AVT-200 Hypersonic Laminar-Turbulent Transition |
| Number of Pages | 20 |
| Year | 2012 |
| Place of Publication | United States |
| Conference/Event | RTO-MP-AVT-200 Hypersonic Laminar-Turbulent Transition |
| Event Details | RTO-MP-AVT-200 Hypersonic Laminar-Turbulent Transition Event Date 16 to end of 19 Apr 2012 Event Location San Diego, United States |
| Abstract | Pressure fluctuations caused by instabilities in the boundary layer are among the causes which lead to transition on a space vehicle during atmospheric re-entry. The knowledge of these unsteady fluctuations could help to identify the mechanisms which take part into the transition process and better predict them. In this framework and in support of the EXPERT PL4/PL5 post-flight analysis, surface pressure measurements have been performed in the VKI H3 Hypersonic Wind Tunnel. A 7deg half-angle cone with exchangeable nosetip was equipped with a stream-wise array of high frequency pressure transducers (PCB 132A31). Instabilities in the boundary layer have been investigated on a smooth surface and behind an isolated roughness element. Experimental data are then compared with linear stability theory computations, in support to the e^N transition prediction method and to the calibration of the ground facility. The results provided on a simplified ground test model, show the growth of second mode waves under a laminar boundary layer and their break down to turbulence as a function of Reynolds number and streamwise location. Moreover the effect of an isolated roughness element on the boundary layer has been characterized in terms of generated instabilities. |
| ANZSRC Field of Research 2020 | 400106. Hypersonic propulsion and hypersonic aerothermodynamics |
| 401204. Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics) | |
| 401205. Experimental methods in fluid flow, heat and mass transfer | |
| Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
| Byline Affiliations | Von Karman Institute for Fluid Dynamics, Belgium |
| Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q7941/natural-and-induced-transition-on-a-7deg-half-cone-at-mach-6
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