Prediction of Hypersonic Boundary-Layer Transition in Wind Tunnels and Flight

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9101-18-C-0021
Agency Tracking Number: F161-024-0732
Amount: $749,993.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: AF161-024
Solicitation Number: 2016.1
Solicitation Year: 2016
Award Year: 2018
Award Start Date (Proposal Award Date): 2018-01-03
Award End Date (Contract End Date): 2020-04-03
Small Business Information
701 McMillian Way NW, Huntsville, AL, 35806
DUNS: 185169620
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr. Ragini Acharya
 (256) 726-4800
Business Contact
 Tanu Singhal
Phone: (256) 726-4924
Research Institution
Accurate forecasting of boundary-layer transition is critical for hypersonic vehicle design as transition significantly affects aerodynamic drag and heating.The ultimate goal of this SBIR project is to assemble easy-to-use, accurate, and efficient tools validated via ground-test data and ready to be applied for flight to predict transition on hypersonic vehicles.During phase I, algorithms were developed to estimate the onset of 2nd mode dominated transition in large-scale facilities. During phase II, this framework will be advanced to include relevant physics such as freestream disturbances, non-equilibrium thermochemistry, ablation-induced blowing, and surface roughness to enable predictions of 3D boundary layers that can have crossflow, multiple modes, secondary or subcritical instabilities, and other phenomena that lead to transition. Receptivity computations will be performed to account for various relevant thermo-physico-chemical processes with systematic validation occurring via available ground and flight data. Additionally, the amplitude-based receptivity model from Marineau et al. will be demonstrated on several configurations and compared with high-fidelity simulations. The integrated physics-based and rigorously validated stability toolbox will be delivered to the government in a format ready for integration with a number of existing hypersonic simulation tools utilized by the sponsor, and onsite training and documentation will be provided.

* Information listed above is at the time of submission. *

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