Technologies for Rapid Affordable Hypersonic Flight Testing

Period of Performance: 11/25/2009 - 11/25/2011


Phase 2 SBIR

Recipient Firm

Industrial Measurement Systems, Inc.
2760 Beverly Dr. #4
Aurora, IL 60502
Principal Investigator


The transition in boundary layer flows from laminar to transitional to turbulence has an important impact in hypersonic vehicle aerodynamics and aerothermodynamics. Ground tests of boundary layer transition are generally unsatisfactory due to the high noise levels of ground facilities compared to flight. Flight provides the best environment for measuring transition. However, current methods for measuring boundary layer transition are tedious, lack sufficient bandwidth, and are invasive in that the sensors often alter and disrupt the flow. Using commercial instrumentation in the Phase I program, we demonstrated the ability to use ultrasound to measure small, rapid temperature variations (