Drag reduction of flow boiling with polymer additives
来源期刊：中南大学学报(英文版)2001年第2期
论文作者：QIU Yun-ren CHEN Wei-ping SI Qin
文章页码：143 - 146
Key words：polymer additive; flow boiling; drag reduction; pressure drop
Abstract: The drag-reducing effect of polymer additive aqueous solution was investigated in flow boiling,and the polymer additiveswere two kinds of polyacrylamide (PAM) with relative molecularmass about 2.56×106 and 8.55×106. The frictional pressure dropwas calculated according to the measured total pressure drop.The results showthat the flowdrag of flowboiling is reduced by adding a small amount of PAMtowaterwhenheat flux is in the range of 15.1 kW·m-2 to 47.0 kW·m-2, when the mass fraction of PAM is higher than 2.0×10-5, the drag-reducing effect is obvious. Drag-reducing effect of PAM, whose relative molecular massis 8.55×106, is slightly betterthan thatof 2.56×106 atthe same mass fraction, and the greaterthe flowrate of the additive solution, the better the effect of the drag reduction.
