Thermal analysis of jet impingement on hemispherical protrusion on heated surface

ABSTRACT

Jet impingement on absorber plate with hemispherical protrusion is taken up for heat and friction characteristics analysis, where the protrusions are provided exactly below the jet holes to provide impingement over the protrusions for generating larger turbulence. The geometric parameters selected for experimental analysis are Relative protrusion diameter to protrusion height ratio ($d_{pr}/e_{pr}$), Relative streamwise pitch ($X/D_h$), relative spanwise pitch ($Y/D_h$). The maximum value of Thermohydraulic performance parameter ($\eta$) achieved was 3.01. The Nusselt number ($Nu$) and friction factor ($f$) correlations are developed and second law analysis is carried out for the selected range of geometric and flow parameters.

KEYWORDS:

• Jet impingement
• solar energy
• hemispherical protrusion
• thermohydraulic performance

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Disclosure statement

All the authors declared that there is no conflict of interest.