scholarly journals Experimental Investigation on Velocity and Temperature Field in a Rotating Non-isothermal Turbulent Boundary Layer using Hot-wire

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Li Gangfu ◽  
Li Haiwang ◽  
You Ruquan ◽  
Wu Huijie ◽  
Tao Zhi ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Experimental Investigation ◽  
Temperature Field ◽  
Turbulent Boundary Layer ◽  
Hot Wire

Spatial structure in the viscous sublayer

1971 ◽  
Vol 50 (3) ◽  
pp. 493-512 ◽  
Author(s):  
A. K. Gupta ◽  
J. Laufer ◽  
R. E. Kaplan
Keyword(s):  
Boundary Layer ◽  
Experimental Investigation ◽  
Turbulent Boundary Layer ◽  
Spatial Structure ◽  
Flow Visualization ◽  
Quantitative Description ◽  
Spatial Coherence ◽  
Viscous Sublayer ◽  
Hot Wire ◽  
Extract Information

An experimental investigation was performed to study the spatial coherence of structures in the sublayer of a turbulent boundary layer observed previously by flow visualization. The present work verifies these observations in an Eulerian reference frame and develops a statistical description of the phenomenon. The technique involves simultaneous digital sampling of an array of constant temperature hot-wire anemometers arranged to extract information about a spanwise variation in flow quantities. The quantitative description agrees with dimensionless measures of the structure scales previously published.

Separation in oscillating laminar boundary-layer flows

1971 ◽  
Vol 47 (1) ◽  
pp. 21-31 ◽  
Author(s):  
R. A. Despard ◽  
J. A. Miller
Keyword(s):  
Experimental Data ◽  
Boundary Layer ◽  
Experimental Investigation ◽  
Reynolds Number ◽  
Reverse Flow ◽  
Oscillation Amplitude ◽  
Hot Wire ◽  
Boundary Layer Flows ◽  
Laminar Boundary Layers ◽  
History Of

The results of an experimental investigation of separation in oscillating laminar boundary layers is reported. Instantaneous velocity profiles obtained with multiple hot-wire anemometer arrays reveal that the onset of wake formation is preceded by the initial vanishing of shear at the wall, or reverse flow, throughout the entire cycle of oscillation. Correlation of the experimental data indicates that the frequency, Reynolds number and dynamic history of the boundary layer are the dominant parameters and oscillation amplitude has a negligible effect on separation-point displacement.

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