Effects of Elevated Free-Stream Turbulence on Flow and Thermal Structures in Transitional Boundary LayersSource: Journal of Turbomachinery:;1995:;volume( 117 ):;issue: 003::page 407DOI: 10.1115/1.2835676Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The effects of elevated free-stream turbulence on flow and thermal structures in transitional boundary layers were investigated experimentally on a heated flat plate. Detailed boundary layer measurements using a three-wire probe and wall heat transfer were made with free-stream turbulence intensities of 0.5, 3.8, 5.5, and 6.4 percent, respectively. The onset of transition, transition length, and the turbulent spot formation rate were determined. The statistical results of the streamwise and cross-stream velocity fluctuations, temperature fluctuation, Reynolds stresses, and Reynolds heat fluxes were presented. The eddy viscosity, turbulent thermal diffusivity, and the turbulent Prandtl number were calculated and related physical mechanisms are discussed.
keyword(s): Turbulence , Flow (Dynamics) , Boundary layers , Flat plates , Prandtl number , Probes , Mechanisms , Heat , Temperature , Heat transfer , Measurement , Eddies (Fluid dynamics) , Viscosity , Wire , Flux (Metallurgy) , Stress , Fluctuations (Physics) AND Thermal diffusivity ,
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| contributor author | D. Zhou | |
| contributor author | T. Wang | |
| date accessioned | 2017-05-08T23:48:36Z | |
| date available | 2017-05-08T23:48:36Z | |
| date copyright | July, 1995 | |
| date issued | 1995 | |
| identifier issn | 0889-504X | |
| identifier other | JOTUEI-28645#407_1.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/116138 | |
| description abstract | The effects of elevated free-stream turbulence on flow and thermal structures in transitional boundary layers were investigated experimentally on a heated flat plate. Detailed boundary layer measurements using a three-wire probe and wall heat transfer were made with free-stream turbulence intensities of 0.5, 3.8, 5.5, and 6.4 percent, respectively. The onset of transition, transition length, and the turbulent spot formation rate were determined. The statistical results of the streamwise and cross-stream velocity fluctuations, temperature fluctuation, Reynolds stresses, and Reynolds heat fluxes were presented. The eddy viscosity, turbulent thermal diffusivity, and the turbulent Prandtl number were calculated and related physical mechanisms are discussed. | |
| publisher | The American Society of Mechanical Engineers (ASME) | |
| title | Effects of Elevated Free-Stream Turbulence on Flow and Thermal Structures in Transitional Boundary Layers | |
| type | Journal Paper | |
| journal volume | 117 | |
| journal issue | 3 | |
| journal title | Journal of Turbomachinery | |
| identifier doi | 10.1115/1.2835676 | |
| journal fristpage | 407 | |
| journal lastpage | 417 | |
| identifier eissn | 1528-8900 | |
| keywords | Turbulence | |
| keywords | Flow (Dynamics) | |
| keywords | Boundary layers | |
| keywords | Flat plates | |
| keywords | Prandtl number | |
| keywords | Probes | |
| keywords | Mechanisms | |
| keywords | Heat | |
| keywords | Temperature | |
| keywords | Heat transfer | |
| keywords | Measurement | |
| keywords | Eddies (Fluid dynamics) | |
| keywords | Viscosity | |
| keywords | Wire | |
| keywords | Flux (Metallurgy) | |
| keywords | Stress | |
| keywords | Fluctuations (Physics) AND Thermal diffusivity | |
| tree | Journal of Turbomachinery:;1995:;volume( 117 ):;issue: 003 | |
| contenttype | Fulltext |