Thermal analysis of jet impingement on hemispherical protrusion on heated surface

被引：22

作者：

Maithani, Rajesh ^{[1
]}

Kumar, Anil ^{[1
]}

Raghav, Geetanjali ^{[1
]}

Nagpal, Mohit ^{[1
]}

Kumar, Bipin ^{[2
]}

机构：

[1] Univ Petr & Energy Studies, Dept Mech Engn, Dehra Dun 248007, Uttarakhand, India

[2] DIT Univ, Dept Mech Engn, Dehra Dun, Uttarakhand, India

来源：

EXPERIMENTAL HEAT TRANSFER | 2021年 / 34卷 / 07期

关键词：

Jet impingement; solar energy; hemispherical protrusion; thermohydraulic performance; SOLAR AIR HEATER; ARRAY; FLOW; PERFORMANCE; COLLECTORS; RIBS;

D O I：

10.1080/08916152.2020.1808117

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

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.

引用

页码：662 / 677

页数：16

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