Accession Number:

AD0648497

Title:

TURBULENT HEAT TRANSFER IN THE THERMAL ENTRANCE REGION OF A PERFECTLY INSULATED PIPE

Descriptive Note:

Technical rept.

Corporate Author:

AEROSPACE RESEARCH LABS WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1966-09-01

Pagination or Media Count:

47.0

Abstract:

The problem considered is that of finding the thermal entrance or thermal mixing region of a pipe where the wall heat flux is zero along the length of the pipe. The fluid is assumed to enter the pipe with a non-uniform temperature profile and a fully developed turbulent velocity profile. The approach is analogous to that introduced by Fettis for the solution of the uniform wall temperature problem. The results for different radii tubes and Reynolds numbers are presented in graphs which show the adjustment of the temperature profile down the pipe. These results provide information concerning the minimum length mixing tube, since any wall losses will require a greater length.

Subject Categories:

  • Fluid Mechanics
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE