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.

摘要

射流冲击对具有半球形突起的吸收板进行热和摩擦特性分析，其中突起正好位于喷射孔的下方，以提供对突起的冲击以产生更大的湍流。选择用于实验分析的几何参数为相对突起直径与突起高度比（$d_{磷r}/{\mathrm{电子}}_{磷r}$), 相对流向间距 ($X/D_H$), 相对展向螺距 ($是/D_H$）。热工水力性能参数最大值（$\eta$) 达到 3.01。努塞尔数（$N你$) 和摩擦系数 ($F$) 相关性得到发展，并针对选定的几何和流动参数范围进行第二定律分析。