Experimental investigations of flow field and heat transfer characteristics due to periodically pulsating impinging air jets
| Autor: | T. Janetzke, W. Nitsche, J. Täge |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science Convective heat transfer Magnitude (mathematics) Thermodynamics Mechanics Condensed Matter Physics Flow field Physics::Fluid Dynamics symbols.namesake Coincident Thermal Heat transfer symbols Astrophysics::Solar and Stellar Astrophysics Strouhal number Excitation |
| Zdroj: | Heat and Mass Transfer. 45:193-206 |
| ISSN: | 1432-1181 0947-7411 |
| DOI: | 10.1007/s00231-008-0410-8 |
| Popis: | The paper concentrates on increasing convective heat transfer due to periodically pulsating impinging air jets. A maximum enhancement rate of cooling effectiveness up to 20% could be detected at an excitation Strouhal number of Sr = 0.82 when using a high pulsation magnitude. Reductions up to 5% occured at low Strouhal numbers with coincident high pulsation magnitudes as well. The thermal results were completed with phase-locked flow field investigations by means of PIV and surface visualizations using the oil film method. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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