Surface hot-film method for the measurement of transition, separation and reattachment pointsA real-time method of determining positions of laminar-to-turbulent transition region, separation and reattachment points and stagnation points using an array of simultaneously operated surface-mounted hot-film sensors has been developed and applied to a wind-tunnel test of a multielement airfoil model. Determination of various types of transitions and flow directions in various regimes of flows seen on multielement airfoils are possible without precise sensor calibration or laborious post-test data analysis. The results agree with established method and theoretical methods, but determination of turbulent reattachment points are not yet satisfactory.
Document ID
19930064123
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Nakayama, Akihiko (Kobe Univ. Japan)
Stack, John P. (NASA Langley Research Center Hampton, VA, United States)
Lin, John C. (NASA Langley Research Center Hampton, VA, United States)
Valarezo, Walter O. (McDonnell Douglas Aerospace West Co. Long Beach, CA, United States)