Aerodynamic testing in cryogenic nitrogen gas - A precursor to testing in superfluid heliumTesting techniques for transonic cryogenic tunnels using nitrogen as the test fluid are presented. The measurement of static aerodynamic coefficients used to determine component efficiency is discussed, focusing on tests of two-dimensional airfoils at transonic Mach numbers. Also, three-dimensional tests of complete configurations and sidewall mounted wings are examined. Consideration is given to time-dependent phenomena, fluid mechanics, nonintrusive laser techniques, the detection of transition and separation, and testing for flutter, buffet, and oscillating airfoil characteristics.
Document ID
19900034878
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lawing, Pierce L. (NASA Langley Research Center Hampton, VA, United States)