Accession Number:

AD1093305

Title:

Transitional Zone Length And Simulation Of Discrete Roughness For Hypersonic Boundary Layers

Descriptive Note:

Technical Report,01 Mar 2015,31 Oct 2019

Corporate Author:

Air Force Research Laboratory Wright-Patterson Air Force Base United States

Report Date:

2019-10-31

Pagination or Media Count:

63.0

Abstract:

This final technical report summarizes activity on AFRL 6.1 laboratory task LRIR 15RQCOR102 for the last fiscal year of this activity, 2019. During this year, the transition zone length on the HIFiRE-5b flight was assessed and high-fidelity simulation of transition induced by discrete roughness in the presence of noise was executed. Results for HIFiRE-5b showed that the transition zone length was relatively short, generally less than the fully laminar length preceding transition. Transitional heating overshoot was observed on some parts of the vehicle. High-fidelity simulations of the HIFiRE cone were able to reproduce transition trends due to roughness and wind tunnel noise that were observed in ground test.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE