Impingement Heat Transfer of Various Lobe-Shaped Nozzles
| Autor: | Sanskar S. Panse, Prashant Singh, Srinath V. Ekkad, Srivatsan Madhavan |
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| Rok vydání: | 2019 |
| Předmět: |
Convection
Materials science Steady state (electronics) Astrophysics::High Energy Astrophysical Phenomena Nozzle Reynolds number Astrophysics::Cosmology and Extragalactic Astrophysics Heat transfer coefficient Mechanics complex mixtures Lobe symbols.namesake medicine.anatomical_structure Heat transfer Thermography symbols medicine human activities |
| Zdroj: | Volume 8: Heat Transfer and Thermal Engineering. |
| Popis: | This paper presents heat transfer characteristics of lobed nozzles, three different lobe configurations viz. three-, four- and six-lobe jets have been tested over a range of Reynolds numbers (based on the effective jet diameter, de) between 8000 and 16000 and normalized jet-to-target spacings (z/de) of 1.6, 3.2 and 4.8. The heat transfer results of lobed configurations were compared to the baseline configuration of circular jets. Steady-state infrared thermography (IRT) experiments were carried out for convective heat transfer coefficient calculations. Experimental results show that the three lobe configuration has a superior heat transfer performance compared to other configurations. Jet-to-target plate standoff distance had drastic effect on the heat transfer performance and contour plots for the lobed nozzles, as heat transfer performance diminished with increase in z/de. For the lobe configurations, with increase in jet-to-target spacing (z/de), the heat transfer coefficient maps tend towards a more circular profile due to the effect of jet diffusion. |
| Databáze: | OpenAIRE |
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