HEAT TRANSFER IN A HORIZONTAL COILED PIPE
IN A TRANSIENT REGIME AND AT A NEAR-CRITICAL
PRESSURE OF A FLUID

R. F. Kelbaliev, R. Yu. Aliev,
and M. B. Ismailov

UDC 536.242.08

It has been established that in the region of pressures 
close to a critical one, heat transfer in a transient regime of motion 
of a single-phase flow in a horizontal coil pipe changes nonuniformly 
over the cross section of the perimeter. The main factors here are 
the influence of inertia forces and of free convection. Equations 
to calculate the heat-transfer coefficient are suggested.

Azerbaijan State Petroleum Academy, 20 Azadlyg Ave., Baku, 
Az1010, Azerbaijan. Translated from Inzhenerno-Fizicheskii Zhurnal, 
Vol. 81, No. 5, pp. 892-896, September-October, 2008. Original 
article submitted May 3, 2007; revision submitted January 31, 2008.