Development of Improved WMLES Capabilities for Hypersonic Flows for Body-Fitted and IBM-based CFD Solvers
Abstract
The ability to operate hardware at hypersonic speeds provides the DoD with a rapid response capability. In order to come up with optimal hypersonic vehicle designs it is of utmost importance to have a clear understanding of the relevant flow physics and how they are affected by a wide range of parameters, including the external environment, the vehicle shape and the flight trajectory. Key challenges for hypersonic flow prediction are the laminar/transition flow region that is typically more substantial than for low-speed vehicles as well as the compressibility effects and high heat transfer rates for turbulent flows. It is well-established that current RANS approaches lack the ability to accurately predict heat transfer rates at hypersonic flow conditions. The proposed research effort aims to improve the ability of current simulation methods to accurately and efficiently predict the flow field around hypersonic vehicles by developing advanced wall-modeled large eddy simulation (WMLES)capabilities. WMLES provides a promising alternative forimproved skin friction and heat flux prediction capabilities, especially, for complex flow scenarios involving transition, shock boundary layer interaction and separation but the full potential for hypersonic flows has not yet been fully demonstrated.The current research project aims to address the following key issues of wall-stress model based WMLES prevalent for hypersonic flow applications:# Develop wall-models that remain accurate at hypersonic conditions.# Assess the importance of unsteadiness in the wall-model at hypersonic conditions and develop ways to handle it with retained accuracy.# Develop a WMLES framework that can efficiently and accurately handle flows that transition from laminar to turbulent
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 15, 2023
- Source ID
- N000142312459
Entities
People
- Christoph Brehm
Organizations
- Office of Naval Research
- United States Navy
- University of Maryland