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Drag reduction of flow boiling with polymer additives

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Abstract

The drag-reducing effect of polymer additive aqueous solution was investigated in flow boliling, and the polymer additives were two kinds of polyacrylamide (PAM) with relative molecular mass about 2.56×106 and 8.55×106. The frictional pressure drop was calculated according to the measured total pressure drop. The results show that the flow drag of flow boiling is reduced by adding a small amount of PAM to water when heat 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 mass is 8.55×106, is slightly better than that of 2.56×106 at the same mass fraction, and the greater the flow rate of the additive solution, the better the effect of the drag reduction.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Central South University, 410083, Changsha, China

    Qiu Yun-ren

  2. Editorial Office of Journal of Central South University, 410083, Changsha, China

    Chen Wei-ping

  3. College of Chemical Engineering, Tianjin University, 300072, Tianjin, China

    Si Qin

Authors
  1. Qiu Yun-ren
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  2. Chen Wei-ping
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  3. Si Qin
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Additional information

Foundation item: The Natural Science Foundation of Tianjin (No. 94220)

Biography of the first author: QIU Yun-ren, born in 1966, majoring in heat and mass transfer in chemical engineering.

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Qiu, Yr., Chen, Wp. & Si, Q. Drag reduction of flow boiling with polymer additives. J Cent. South Univ. Technol. 8, 143–146 (2001). https://doi.org/10.1007/s11771-001-0043-2

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  • DOI: https://doi.org/10.1007/s11771-001-0043-2

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