Constant temperature hot-wire anemometer practice in supersonic flows

The performance of a constant-temperature normal hotwire in a supersonic flow is critically examined. It is shown that this instrument is inherently unsuitable for measuring turbulent temperature correlations because of the highly non-linear response to temperature fluctuations, particularly at low overheat ratios. The instrument is therefore limited to measurements of mean and fluctuating mass-flow rates. Suitable calibration procedures. as well as the limits on spatial and temporal resolution are discussed. and corrections for mean stagnation temperature changes are suggested. The instrument was used to measure the mass-flow fluctuations in a zero pressure gradient Mach 2.9 turbulent boundary layer. A comparison with the available data suggests good agreement.

[1]  A. E. Perry,et al.  Hot-Wire Anemometry , 1982 .

[2]  P. S. Klebanoff,et al.  Characteristics of turbulence in a boundary layer with zero pressure gradient , 1955 .

[3]  A. Kistler,et al.  Fluctuation Measurements in a Supersonic Turbulent Boundary Layer , 1959 .

[4]  J. Laufer,et al.  Measurements of heat transfer from fine wires in supersonic flows , 1956, Journal of Fluid Mechanics.

[5]  A. Smits,et al.  The effect of varying resistance ratio on the behaviour of constant-temperature hot-wire anemometers , 1980 .

[6]  H. Fernholz,et al.  A Further Compilation of Compressible Boundary Layer Data with a Survey of Turbulence Data , 1981 .

[7]  I. E. Beckwith,et al.  Compressible laminar boundary layer over a yawed infinite cylinder with heat transfer and arbitrary Prandtl number , 1957 .

[8]  D. A. Johnson,et al.  Laser Velocimeter and Hot-wire Anemometer Comparison in a Supersonic Boundary Layer , 1975 .

[9]  Alexander J. Smits,et al.  The response to temperature fluctuations of a constant-current hot-wire anemometer , 1978 .

[10]  Alexander J. Smits,et al.  The effects of certain low frequency phenomena on the calibration of hot wires , 1979, Journal of Fluid Mechanics.

[11]  Alexander J. Smits,et al.  Constant-temperature hot-wire anemometer practice in supersonic flows. II - The inclined wire , 1983 .

[12]  V. A. Sandborn.  A review of turbulence measurements in compressible flow , 1974 .

[13]  Peter Freymuth,et al.  Further investigation of the nonlinear theory for constant-temperature hot-wire anemometers , 1977 .

[14]  Graham L. Morrison,et al.  A study of the constant-temperature hot-wire anemometer , 1971, Journal of Fluid Mechanics.

[15]  H. Fernholz,et al.  Turbulence measurements in an adverse-pressure-gradient three-dimensional turbulent boundary layer along a circular cylinder , 1981, Journal of Fluid Mechanics.

[16]  J. Wyngaard,et al.  Measurement of small-scale turbulence structure with hot wires , 1968 .

[17]  L. Kovasznay,et al.  The Hot-Wire Anemometer in Supersonic Flow , 1950 .

[18]  Gary S. Settles,et al.  Detailed Study of Attached and Separated Compression Corner Flowfields in High Reynolds Number Supersonic Flow , 1979 .

[19]  Peter Bradshaw,et al.  An introduction to turbulence and its measurement , 1971 .