Experimental investigation on the heat transfer and heat sink characteristics of the kerosene-water emulsion in a rectangular channel

Abstract

To investigate the heat transfer and heat sink characteristics of the kerosene-water emulsion in a rectangular channel, experiments were conducted at the pressure of 3.0MPa, the mass flow rate of 0.5-2.6g/s and the water content of 10-50 wt.%. Compared with the pure kerosene, obvious heat transfer deteriorations caused by the dryout of the water in the emulsion could be observed at the middle part of the channel. With the increase of the heat flux, the deterioration point moved towards to the inlet of the channel. The heat transfer performance of the channel with the catalyst sprayed inside was better than that of the raw channel, but the catalyst had little influence on the heat sink of the emulsion. Under the same outlet fuel temperature, better heat transfer performance could be achieved at higher mass flow rate. However the heat sink of the emulsion decreased with the increase of the mass flow rate. At low outlet temperature, the increase of the water content would lead to a higher heat sink. The heat sink differences between different water content decreased with the increase of temperature and vanished when the fuel temperature reached 700℃. The increase of the water content was detrimental to the heat transfer near the outlet.