Theoretical developments in hypersonic turbulent boundary layers with application to friction and heat transfer estimation
Abstract
The skin friction and wall heat transfer rates are crucially important for high-speed vehicles, and thus conceptual design of high-speed vehicles requires fast methods to estimate these quantities. Conceptual design requires methods that can estimate the friction coefficient and the heat transfer coefficient for a turbulent boundary layer in seconds on a desktop computer. This is an area where fundamental research feeds directly into applied engineering, since improved accuracy in the estimated friction and heat transfer allows for more aggressive conceptual designs with smaller safety margins. Current engineering prediction tools yield errors in the friction coefficient of about 10percent, and even more for the heat transfer coefficient. This project is focused on improving our theoretical description of high-speed turbulent boundary layers, and to use this information to develop more accurate engineering prediction tools. The work is centered around the development of near-wall scaling theory and the use of similarity analysis in the presence of non-zero pressure gradients. The project will also involve the generation of several direct numerical simulation data sets for validation at high Mach numbers and for various wall thermal conditions.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 22, 2024
- Source ID
- FA86552317016
Entities
People
- Sergio Pirozzoli
Organizations
- Air Force Office of Scientific Research
- Sapienza University of Rome
- United States Air Force