Abstract
Heat transfer to forced supercritical helium has been measured at fluid temperatures of 4.2 to 11K and pressures of 2 to 15 atm (0.2 to 1.5MN/m2). A test section is a 0.109cm i.d. ×8.5cm long stainless-steel tube through which helium flows vertically upwards.
Measured results have shown that supercritical helium is similar to ordinary supercritical fluids in turbulent heat transfer. For example, an enhancement of heat transfer coefficient occurs near the transposed critical temperature and the enhancement disappears at high heat flux. The dada have been compared with the correlation proposed by Miropolskii et al. Some phenomena like “pseudo boiling” have been observed.
