HEAT AND FLUID-FLOW IN RECTANGULAR SOLAR AIR HEATER DUCTS HAVING TRANSVERSE RIB ROUGHNESS ON ABSORBER PLATES

被引：191

作者：

GUPTA, D ^{[1
]}

SOLANKI, SC ^{[1
]}

SAINI, JS ^{[1
]}

机构：

[1] UNIV ROORKEE,DEPT MECH & IND ENGN,ROORKEE 247667,UTTAR PRADESH,INDIA

来源：

SOLAR ENERGY | 1993年 / 51卷 / 01期

关键词：

D O I：

10.1016/0038-092X(93)90039-Q

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

An experimental investigation has been carried out to determine the effect of transverse wire roughness on heat and fluid flow characteristics in transitionally rough flow region (5 < e+ < 70) for rectangular solar air heater ducts with an absorber plate having transverse wire roughness on its underside. The investigation covered a Reynolds number range of 3000-18000 for a duct aspect ratio of 6.8-11.5, relative roughness height of 0.018-0.052 ata relative roughness pitch of 10 encompassing a range of roughness Reynolds number between 5-70. Simple correlations for a Nusselt number and friction factor have been developed in terms of geometrical parameters of roughness, duct cross section, and the flow Reynolds number.

引用

页码：31 / 37

页数：7

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