NACA-RM-E53J07

Measurement of heat-transfer and friction coefficients for flow of air in noncircular ducts at high surface temperatures

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T17:26:13Z
date available	2017-09-04T17:26:13Z
date copyright	01/01/1954
date issued	1954
identifier other	CJMCWDAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std/handle/yse/149282
description abstract	INTRODUCTION An experimental investigation was instituted at the NACA Lewis laboratory to obtain heat-transfer and related pressure-drop information for air flowing in tubes at high surface and fluid temperatures. The effects of such variables as surface temperature, inlet-air temperature, length-to-diameter ratio, and tube-entrance configuration on heat transfer and pressure drop in smooth round tubes are summarized in reference 1. The scope of the general investigation is extended herein to include the effect of flow-passage shape on heat-transfer and friction coefficients for air flowing through electrically heated square, triangular, and rectangular tubes at high heat-flux conditions. Data were obtained for a range of Reynolds number from 1000 to 330,000 and surface temperature from 540º to 1780º R, and the results are compared with those of reference 1 for circular tubes.
language	English
title	NACA-RM-E53J07	num
title	Measurement of heat-transfer and friction coefficients for flow of air in noncircular ducts at high surface temperatures	en
type	standard
page	28
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1954
contenttype	fulltext