Transition Within a Hypervelocity Boundary Layer on a 5-Degree Half-Angle Cone in Air/CO2 Mixtures
Technical paper, Jan-Apr 2014
AIR FORCE RESEARCH LAB EDWARDS AFB CA ROCKET PROPULSION DIV
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Laminar to turbulent transition on a smooth 5-degree half angle cone at zero angle of attack is investigated computationally and experimentally in hypervelocity flows of air, carbon dioxide, and a mixture of 50 air and carbon dioxide by mass. Transition N factors above 10 are observed for air flows. At comparable reservoir enthalpy and pressure, flows containing carbon dioxide are found to transition up to 30 further downstream on the cone than flows in pure air in terms of x-displacement, and up to 38 and 140, respectively, in terms of the Reynolds numbers calculated at edge and reference conditions.
- Fluid Mechanics