Fluid Ablation Interactions on a Compression Ramp at Mach 8

Başkaya, A.O.; Hickel, S.; Dungan, Sean; Brehm, Christoph

doi:10.2514/6.2024-0501

Fluid Ablation Interactions on a Compression Ramp at Mach 8

Title

Fluid Ablation Interactions on a Compression Ramp at Mach 8

Author

Başkaya, A.O. (TU Delft Aerodynamics)
Hickel, S. (TU Delft Aerodynamics)
Dungan, Sean (University of Maryland)
Brehm, Christoph (University of Maryland)

Date

2024

Abstract

Direct numerical simulations (DNS) are performed over a 15° compression ramp undergoing ablation at Mach 8 to examine fluid-ablation interactions (FAI) on transitional high-speed boundary layers. The experiments at these conditions with a rigid wall are first numerically replicated for a laminar flow. Heating streaks are introduced by introducing perturbations in the baseflow informed by prior stability calculations. The ramp is then replaced by a low-temperature ablator in our DNS and the interaction of the streaks with the recessing ablator surface are examined. Different approaches from two independently developed solvers are used to study this problem. Overall, both solvers provide qualitatively and quantitatively very similar results; however, differences in streak amplification and mass blowing magnitudes are observed. We discuss the difficulties in accurately predicting ablation and present the first findings regarding its influence on the perturbation evolution and transition to turbulence for this configuration.

To reference this document use:

http://resolver.tudelft.nl/uuid:44386502-cdf6-4542-8419-4d31aa4527a1

DOI

https://doi.org/10.2514/6.2024-0501

Publisher

American Institute of Aeronautics and Astronautics Inc. (AIAA)

ISBN

9781624107115

Source

Proceedings of the AIAA SCITECH 2024 Forum

Event

AIAA SCITECH 2024 Forum, 2024-01-08 → 2024-01-12, Orlando, United States