ESTIMATION OF THE THERMOHYDRAULIC EFFICIENCY
OF SWIRLERS AT SMALL REYNOLDS NUMBERS

A. F. Ryzhkov,a L. Zhargalkhuu,b 
Nadir Saman M. Sharif,a and A. D. Makhaeva

UDC 621.036.536.244

To estimate the thermohydraulic efficiency of different 
types of swirlers of heat exchange in pipes, we have generalized the 
experimental data, which has made it possible to determine the optimal 
range of Reynolds numbers and the optimal geometric sizes of swirlers.

Keywords: transient regime, intensification of heat 
exchange, twisted tape, wire insert, screw, one-propeller insert, 
two-propeller insert, thermal efficiency, hydraulic efficiency, energy 
efficiency.

aGOU VPO "Urals State Technical University - UPI," 19 Mir Str.,
 Ekaterinburg, 620002, Russia; email: mahaev-anton@rambler.ru; 
bMongolian State University of Science and Technology, Ulan-Bator, 
Mongolia. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 82, No. 1, 
pp. 23-30, January-February, 2009. Original article submitted September 13, 
2006; revision submitted May 28, 2008.