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Survey of Measurements and Measuring Techniques in Rapidly Distorted Compressible Turbulent Boundary Layers,

ADA211107

Publication Date	1989
Personal Author	Fernholz, H. H.; Dussauge, J. P.; Finlay, P. J.; Smits, A. J.; Reshotko, E.
Page Count	248
Abstract	A large body of data for incompressible turbulent boundary layers has been accumulated over many years by many investigations. The measurements have revealed elements of the structure of this complex flow. Three-dimensional multiple scale phenomena have been observed, and there is the beginning of an understanding of the details of the structure and physics. This will lead to more realistic models and physical understanding, which will be primary inputs into concepts of control of these turbulent boundary layers and will provide a framework to validate computations. At high speed, where compressibility is important, there is a paucity of data. The measurements are difficult to obtain and are not easily analyzed. At the same time, there appear to be some possibilities for simplification inherent in rapid distortion theory where the turbulent structure may be frozen if the disturbance is of short duration. There is a critical need for data to evaluate this concept, to provide a base for models of turbulence in compressible flows to compare with imcompressible flows, to provide a more substantial base for our physical understanding, and to provide a framework for the evaluation of the extensive computations which are currently underway. Contents: Rapidly Distorted Compressible Boundary-Layers; Large Scale Motions in Supersonic Turbulent Boundary Layers; Skin-Friction Measurements by Laser Interferometry; Hot-Wire Anemometry in Supersonic Flow; Laser Doppler Anemometry; Laser Doppler Anemometry in Supersonic Flows:Problems of Seeding and Angular Bias; and Fluctuating Wall-Pressure Measurements. (jhd)
Keywords	Compressible flow Turbulent boundary layer Angles Bias Computations Distortion Doppler systems Flow visualization Hot wire anemometers Incompressibility Interferometry Laser anemometers Laser applications Measurement Motion Scale Seeding Short range(Time) Skin friction Supersonic flow Surveys Theory Three dimensional Turbulence Foreign technology NATO Furnished
Source Agency	Non Paid ADAS
NTIS Subject Category	46B - Fluid Mechanics 51A - Aerodynamics
Corporate Authors	Advisory Group for Aerospace Research and Development, Neuilly-sur-Seine (France).
Document Type	Technical Report
NTIS Issue Number	198923

Survey of Measurements and Measuring Techniques in Rapidly Distorted Compressible Turbulent Boundary Layers,

Survey of Measurements and Measuring Techniques in Rapidly Distorted Compressible Turbulent Boundary Layers,
ADA211107

Publication Date	1989
Personal Author	Fernholz, H. H.; Dussauge, J. P.; Finlay, P. J.; Smits, A. J.; Reshotko, E.
Page Count	248
Abstract	A large body of data for incompressible turbulent boundary layers has been accumulated over many years by many investigations. The measurements have revealed elements of the structure of this complex flow. Three-dimensional multiple scale phenomena have been observed, and there is the beginning of an understanding of the details of the structure and physics. This will lead to more realistic models and physical understanding, which will be primary inputs into concepts of control of these turbulent boundary layers and will provide a framework to validate computations. At high speed, where compressibility is important, there is a paucity of data. The measurements are difficult to obtain and are not easily analyzed. At the same time, there appear to be some possibilities for simplification inherent in rapid distortion theory where the turbulent structure may be frozen if the disturbance is of short duration. There is a critical need for data to evaluate this concept, to provide a base for models of turbulence in compressible flows to compare with imcompressible flows, to provide a more substantial base for our physical understanding, and to provide a framework for the evaluation of the extensive computations which are currently underway. Contents: Rapidly Distorted Compressible Boundary-Layers; Large Scale Motions in Supersonic Turbulent Boundary Layers; Skin-Friction Measurements by Laser Interferometry; Hot-Wire Anemometry in Supersonic Flow; Laser Doppler Anemometry; Laser Doppler Anemometry in Supersonic Flows:Problems of Seeding and Angular Bias; and Fluctuating Wall-Pressure Measurements. (jhd)
Keywords	Compressible flow Turbulent boundary layer Angles Bias Computations Distortion Doppler systems Flow visualization Hot wire anemometers Incompressibility Interferometry Laser anemometers Laser applications Measurement Motion Scale Seeding Short range(Time) Skin friction Supersonic flow Surveys Theory Three dimensional Turbulence Foreign technology NATO Furnished
Source Agency	Non Paid ADAS
NTIS Subject Category	46B - Fluid Mechanics 51A - Aerodynamics
Corporate Authors	Advisory Group for Aerospace Research and Development, Neuilly-sur-Seine (France).
Document Type	Technical Report
NTIS Issue Number	198923