THEORETICAL AND EXPERIMENTAL STUDY OF OSCILLATING HEAT PIPES WITH FEW TURNSYu. E. Dolgirev, Yu. F. Gerasimov, and A. V. Melkikh UDC 536.58:536.248.2 A theoretical model of few-turn heat pipes is suggested. The equation for boiling liquid flow in a capillary of the pipe, which allows for the pressure difference of saturated vapor and for gravity and viscosity forces, is written. The parameters at which self-oscillations of the liquid occur have been estimated. It is shown that the period of self-oscillations is determined by the characteristic time of heat exchange between the liquid in the capillary and the surrounding medium. The time of self-oscillations obtained theoretically is in good agreement with the experimental one. The Urals State Technical University, 19 Mir Str., Ekaterinburg, 62002, Russia; firstname.lastname@example.org. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 5, pp. 37-40, September-October, 2003. Original article submitted October 1, 2002.