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Turbulent Boundary Layer Measurement Techniques

F. Kevin OwenA. W. Fiore

出版	Flight Dynamics Laboratory, Air Force Wright Aeronautical Laboratories, Air Force Systems Command, United States Air Force, 1986
URL	http://books.google.com.hk/books?id=vcvwY9gaNSUC&hl=&source=gbs_api

註釋

This report reviews the principles and practice of hot wire anemometry for the measurement of turbulent flows. The requirements and pitfalls involved in the use of hot wire anemometers in sypersonic flows are addressed and the methods used for data acquisition and reduction are detailed. Examples of measurements obtained in AFWAL facilities are presented. Unfortunately in most flows of practical interest, local fluctuation levels exceed those for which reliable hot wire turbulence measurements can be expected. However, our recent developments in laser velocimetry facilitate the non-intrusive, linear measurement of high speed turbulent flows. Measurements of zero pressure gradient and ramp induced adverse pressure gradient flows are presented. The results emphasize the need for combined hot wire and laser velocimeter studies to determine the reliable and useful ranges of both instruments.