Giuseppe Chiapparino, Christian Stemmer

DOI Number XXX-YYY-ZZZ

Conference Number HiSST-2022-373

Direct Numerical Simulations are performed to investigate roughness effects on a Mach 6 hypersonic
compression-corner flow. Different variants of a roughness patch placed upstream of the boundary-layer
smooth separation point are considered. The patches consist of sinusoidal elements, with modifications
in position and spanwise extension of the roughness. Compared to a smooth-wall case, all the rough
cases cause a delayed boundary-layer separation and hence a smaller recirculation bubble. Moreover,
the roughness-induced streamwise vorticity, which is convected downstream by the detached shear
layer, generates mushroom-like structures once the flow reattaches on the ramp. The properties of
such structures, although similar, reflect the character of the patch upstream of the bubble. The roughness inducing the locally largest flow distortion is responsible for the widest structure on the ramp,
characterized by the highest increase in wall-temperature peak. The patch occupying the entire width
of the domain generate instead the weakest vortices on the ramp.

Read the full paper >

In Categories: 1.Events, High-Speed Aerodynamics and Aerothermodynamics, HiSST 2022
Email
Print
LinkedIn
The paper above was part of  proceedings of a CEAS event and as such the author has signed a publication agreement to have their paper published in the repository. In the case this paper is found somewhere else CEAS always links to the other source.  CEAS takes great care in making the correct content available to the reader. If any mistakes are found  in the listings please contact us directly at papers@aerospacerepository.org and we will correct the listing promptly.  CEAS cannot be held liable either for mistakes in editorial or technical aspects, nor for omissions, nor for the correctness of the content. In particular, CEAS does not guarantee completeness or correctness of information contained in external websites which can be accessed via links from CEAS’s websites. Despite accurate research on the content of such linked external websites, CEAS cannot be held liable for their content. Only the content providers of such external sites are liable for their content. Should you notice any mistake in technical or editorial aspects of the CEAS site, please do not hesitate to inform us.