静压及范德瓦尔斯压力对超流氦传热的影响

INFLUENCES OF HYDROSTATIC BATH PRESSURE AND VAN-DER-WAALS PRESSURE ON THE HEAT TRANSFER IN A BATH OF SUPERFLUID HELIUM

Considering the basic heat transfer rules of superfluid helium and the phase diagram ofhelium,pressure effects on heat transfer to Hell are specially studied. If the bath presstire isless than A-pressure (P < Pλ), special peak heat flux density relations are shown to correlatebath pressure, hydrostatic head and Van-der-waals pressure. If the bath pressure is greaterthan λ-pressure(P > Pλ), a generalized formula of peak heat flux density of Hellp bath isshown.