Abstract
Boundary layer on a uniformly heated flat plate was studied experimentally. Both, the velocity boundary layer and the temperature boundary layer, was investigated by means of hot-wire anemometry. A probe with parallel wires was used for velocity-temperature measurement. Experiment was performed in the closed-circuit wind tunnel with several levels of heat flux at the wall. The wall temperature was set up in the interval from 20 ºC to 200 ºC.
Highlights
The subject of the paper is an experimental investigation of boundary layer over a flat plate with heat transfer
Boundary layer was traversed by thermoanemometry probes
Hot wire anemometry is an appropriate tool for measurement in turbulent flow (i.e. [3])
Summary
The subject of the paper is an experimental investigation of boundary layer over a flat plate with heat transfer. The flat plate with aerodynamically smooth heated surface was tested. Boundary layer was traversed by thermoanemometry probes. A parallel-wire probe was applied for the velocity and the temperature measurement. In case of unheated plate an X-wire was used. Calibration of the probes was carried out in a calibrator that allows setting of the flow temperature by heating element inside. 5 m/s and the temperature of plate was ranged in the interval from Ts=20 oC up to 200 oC. Usually achieved value of natural intensity of turbulence of free stream in the test section is 0.8−1.2 per cent. Hot wire anemometry is an appropriate tool for measurement in turbulent flow A platinum thermometer was placed next to hot-wire probe A platinum thermometer was placed next to hot-wire probe (fig. 2) to check the mean temperature of the flow
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