NUCLEATE POOL BOILING ON A FLAT PLATE HEATER UNDER MICROGRAVITY CONDITIONS: RESULTS OF PARABOLIC FLIGHT, AND DEVELOPMENT OF A CORRELATION PREDICTING HEAT FLUX VARIATION DUE TO GRAVITY

摘要

Experiments of pool boiling of HFE7000 on a flat plate have been performed in both earth and microgravity conditions in parabolic flights. The effects of pressure, subcooling and gravity are studied. Results of boiling HFE7000 are compared to those of boiling LOx in microgravity conditions obtained by magnetic compensation. Then a dimensionless correlation based on the scaling of a superheated liquid layer close to the wall is developed. This coorelation is able to predict the influence of pressure and gravity on the heat transfer in boiling of HFE7000and also the pressure effect in the case of boiling LOx.