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Heat Transfer Research

ISSN for PRINT: 1064-2285

Institutional price:	$2485.00
Issues per year:	8

Best Paper Award Selection - Editorial Board Site

2001, Volume32

174 pages

Issue price - $1011.00

Experimental Investigation of the 2nd-Kind Crisis in Horizontal Vapor Generating Channels with a Nonuniform Distribution of Heat Flux Around the Perimeter

V. S. Polonskii
Institute for High Temperatures of the Russian Academy of Sciences, Moscow, Russia

I. L. Mostinskii
Institute for High Temperatures of the Russian Academy of Sciences, Moscow, Russia

I. M. Chernika
Institute for High Temperatures of the Russian Academy of Sciences, Moscow, Russia

ABSTRACT

We present experimental results on limiting vapor contents in the 2nd-kind crisis and on critical heat fluxes in the crisis of wetting in horizontal channels with a uniform heating around the perimeter. Experiments were conducted on round stainless steel tubes with d = 6 mm at P = 6.9; 9.8; 13.7 MPa, ρω = 750, 1000, 2000 kg/(m²·sec) and X = 0.25 ..., 1.0. The degree of nonuniformity is q_max/q = 1.5. The heat carrier is chemically desalinated water. It is shown that nonuniform heating around the perimeter favors an increase in q_cr of the 2nd kind and increase in the mean limiting vapor contents X_lim.