Experimental investigation on the heat transfer characteristics of axial rotating heat pipes

Numerical and Experimental Investigations of a Rotating Heat Pipe

“…In experiments by Song et al, water filled heat pipes with 2.54 cm outer diameters and 40 cm total lengths, both with and without an internal taper on the condenser section, were rotated up to 4000 rpm (Song et al 2004). The data from the experiments of Ponnappan and He and Song et al were analyzed with a modified film condensation analysis (Song et al 2003;Song et al 2004).…”

“…The data from the experiments of Ponnappan and He and Song et al were analyzed with a modified film condensation analysis (Song et al 2003;Song et al 2004). Modifications made to the condensation analysis were (1) the accounting for excess fluid loading (above the optimal) in the heat pipe and (2) the inclusion of natural convection in the liquid film in the evaporator section.…”

“…Song et al have shown that for an axially rotating heat pipe, natural convection in the liquid film of the evaporator section has a significant effect on the overall thermal resistance of the heat pipe (Song et al 2003;Song et al 2004 …”

“…In the numerical heat pipe model developed in Chapter 3, the diffusion term in the energy equation is multiplied by a Nusselt number to account for natural convection in the rotating liquid film lining the wall of the evaporator section. Previous rotating heat pipe studies have shown that characterization of the Nusselt number in the evaporator section plays an important role in determining the overall thermal performance of the heat pipe (Marto 1984;Song et al 2004;Takahashi et al 1995b;Vasiliev and Khrolenok 1976).…”

“…The correlation of Vasiliev and Khrolenok is developed for a rotating heat pipe with a sharp step in the wall at the intersection of the adiabatic and evaporator sections. The applicability of this correlation to cylindrical and smoothly tapered heat pipes has been questioned in the past (Song et al 2004). Finally, Körner's experimental study of heat transfer in thin films lining the wall of a rotating boiler was performed for natural convection in the turbulent regime ( ( )…”