Radiative enhancement of tube-side heat transfer
| Autor: | R.K. Ahluwalia, K.H. Im |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science Number density business.industry Mechanical Engineering Heat transfer coefficient Condensed Matter Physics Protein filament Optics Thermal radiation visual_art Heat transfer visual_art.visual_art_medium Radiative transfer Tube (fluid conveyance) Ceramic Composite material business |
| Zdroj: | International Journal of Heat and Mass Transfer. 37:2635-2646 |
| ISSN: | 0017-9310 |
| DOI: | 10.1016/0017-9310(94)90381-6 |
| Popis: | The potential of augmenting film coefficient by uniformly dispersing thin metallic/ceramic filaments oriented longitudinally along a tube is investigated. The purpose of the rigidly held filaments is to create a participating medium from a gas otherwise transparent to thermal radiation. The filaments absorb the thermal radiation emitted by the tube and transfer the heat convectively to the flowing gas. Wave theory shows that optical thickness > 10 can be achieved with 50 μm SiC filaments at 300 cm −2 number density in a 2.54 cm diameter tube. Solution of the radiation transport equation indicates that the radiative film coefficients are a function of filament material, diameter and number density, and gas and surface temperatures. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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