Measurements of heat transfer rates using a transient technique
An experimental study of heat transfer rates from the test surface in an 11 m long Ludwieg Wind Tunnel was conducted. The flow prevailing in the tunnel is transient, accelerating and low subsonic. It lasts several milliseconds. Fast response thin platinum film transducers are utilized to obtain heat transfer data. The unsteady boundary layer at a given location is first laminar, then transitional and finally fully turbulent. The data for the laminar and turbulent boundary layer compare well with the results from Cohen's solution and Reynolds analogy, respectively. The test conditions include constant wall temperature (room temperature) and a cooler free stream. The measured wall heat fluxes are in the range of 0.1 to 0.8 w/cm/sup 2/.
- Research Organization:
- Department of Mechanical Engineering and Mechanics Drexel University Philadelphia, PA
- OSTI ID:
- 6559191
- Journal Information:
- Am. Soc. Mech. Eng., (Pap.); (United States), Journal Name: Am. Soc. Mech. Eng., (Pap.); (United States) Vol. 83-HT-87; ISSN ASMSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420400* -- Engineering-- Heat Transfer & Fluid Flow
BOUNDARY LAYERS
DATA
ELEMENTS
ENERGY TRANSFER
EXPERIMENTAL DATA
FILMS
FLUID FLOW
HEAT FLOW
HEAT TRANSFER
INFORMATION
LAMINAR FLOW
LAYERS
METALS
NUMERICAL DATA
PLATINUM
PLATINUM METALS
REYNOLDS NUMBER
THIN FILMS
TRANSIENTS
TRANSITION ELEMENTS
TUNNELS
UNDERGROUND FACILITIES
WIND TUNNELS