Library Subscription: Guest
Home Archives Thermal Letter Officers Future meetings Assembly for International Heat Transfer Conferences
International Heat Transfer Conference 7

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

BURNOUT DURING FLOW ACROSS A SMALL CYLINDER INFLUENCED BY PARALLEL CYLINDERS

M. M. Hasan
University of Missouri-Rolla, Rolla, Missouri 65401 USA

Roger Eichhorn
Mechanical Engineering Department l)niversity of Kentucky; Lexington, Kentucky 40506; USA

John H. Lienhard
Mechanical Engineering Department University of Houston, Houston. TX 77204-4792

DOI: 10.1615/IHTC7.1090
pages 285-290

Abstract

Boiling burnout is measured in crossflows over single heated cylinders embedded in arrays of two and three unheated cylinders placed to create interference on the liquid flow field and the vapor removal path.
At very low velocities, the peak heat flux on all arrays is almost identical to that for a single cylinder. At high velocities, neighboring cylinders have an effect only when the heated cylinder is directly in the wake of an unheated cylinder. Then, the unheated cylinder traps a large vapor bubble in the gap region and promotes premature burnout. An unheated cylinder, four diameters or less upstream of a heated cylinder, can reduce the burnout heat flux by as much as 90% of that for a single cylinder.
Results are explained qualitatively in terms of the flow properties in the gap between the cylinders, and a correlation is given for burnout on one cylinder directly above an unheated cylinder.

Purchase $25.00 Check subscription Publication Ethics and Malpractice Recommend to my Librarian Bookmark this Page