caa a22 4500 606244956 CHVBK 20210128101333.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s12567-015-0089-x doi (NATIONALLICENCE)springer-10.1007/s12567-015-0089-x Hink R. German Aerospace Center, Lilienthalplatz 7, 38108, Brunswick, Germany aut Validation of the k - ω turbulence model for the thermal boundary layer profile of effusive cooled walls [Elektronische Daten] [R. Hink] The choice of materials for rocket chamber walls is limited by its thermal resistance. The thermal loads can be reduced substantially by the blowing out of gases through a porous surface. The k-ω-based turbulence models for computational fluid dynamic simulations are designed for smooth, non-permeable walls and have to be adjusted to account for the influence of injected fluids. Wilcox proposed therefore an extension for the k-ω turbulence model for the correct prediction of turbulent boundary layer velocity profiles. In this study, this extension is validated against experimental thermal boundary layer data from the Thermosciences Division of the Department of Mechanical Engineering from the Stanford University. All simulations are performed with a finite volume-based in-house code of the German Aerospace Center. Several simulations with different blowing settings were conducted and discussed in comparison to the results of the original model and in comparison to an additional roughness implementation. This study has permitted to understand that velocity profile corrections are necessary in contrast to additional roughness corrections to predict the correct thermal boundary layer profile of effusive cooled walls. Finally, this approach is applied to a two-dimensional simulation of an effusive cooled rocket chamber wall. CEAS, 2015 Effusion cooling nationallicence Turbulence model nationallicence Computational fluid dynamics nationallicence Rocket combustion chamber nationallicence CEAS Space Journal Springer Vienna 7/3(2015-09-01), 389-398 1868-2502 7:3<389 2015 7 12567 https://doi.org/10.1007/s12567-015-0089-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s12567-015-0089-x text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Hink R. German Aerospace Center, Lilienthalplatz 7, 38108, Brunswick, Germany aut NATIONALLICENCE 773 0- CEAS Space Journal Springer Vienna 7/3(2015-09-01), 389-398 1868-2502 7:3<389 2015 7 12567