Simulation and Modeling of Hypersonic Turbulent Boundary Layers Subject to Pressure Gradient and Wall Cooling
Abstract
This proposal is aimed at enabling more accurate predictions of turbulent heat transfer for hypersonic boundary layer flows subject to the effects of pressure gradient and wall cooling. The research approach is to i) develop a direct numerical simulation (DNS) database for attached, hypersonic turbulent boundary layers over canonical, yet Navy-relevant, 2-D and 3-D configurations (e.g., 2-D planar curved wall, and ogives with circular and elliptic cross sections)and ii) subsequently utilize the DNS database to both characterize the effects of pressure gradient, surface curvature, and wall cooling on boundary-layer turbulence and perform a thorough evaluation of the existing turbulence models as well as the models that are currently under development. Specifically, the study will create benchmark quality flow statistics including boundary layer profiles of mean flow, Reynolds stresses, velocity-temperature correlations, surface skin friction and heat flux, as well as various budget terms in the exactequations of turbulent kinetic energy (TKE) and Reynolds-stress transport; such statistics will be available at the website of the Turbulence Model Benchmarking Working Group of AIAA, allowing other investigators to develop, improve, and validate turbulence models for Reynolds Averaged Navier-Stokes (RANS) equations. The evaluation of existing turbulence models will include a term-by-term comparison of TKE and Reynolds-stress budgets between DNS and theReynolds stress transport modelling as well as an evaluation of the algebraic model for turbulent energy flux based on a priori and a posteriori assessment. The computational work is complementary to the ongoing experimental work by Prof. Rodney Bowersox and his group at the Texas A&M University. The PI will work with the experimental team at the Texas A&M University to conduct detailed comparisons of boundary-layer profiles as well as to computationally support the implementation of the newly developed turbulence models (e.g., the turbulent energy flux closure model) into computational fluid dynamics codes that are widely used by the DoD and its contractors.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 29, 2020
- Source ID
- N000142012194
Entities
People
- Lian Duan
Organizations
- Office of Naval Research
- Ohio State University
- United States Navy