Prediction of countercurrent flow limitation in horizontal pipes


Prediction of countercurrent flow limitation in horizontal pipes

Murase, M.; Kinoshita, I.; Lucas, D.; Tomiyama, A.

To evaluate effects of wall friction coefficients in a one-dimensional model on prediction of countercurrent flow limitation (CCFL), sensitivity computations were done for hot leg models (ratio of length to diameter L/D = 8.6) and a pressurizer surge line model without elbows (L/D = 63) and computed results were compared with measured values. When the interfacial drag coefficient of fi = 0.03 and wall friction coefficients fwG in single-phase gas flows were used, the appropriate amplification for wall friction coefficients fwL in single-phase liquid flows was NwL = 6 to fit the computed CCFL value with the measured CCFL value.

Keywords: Countercurrent gas-liquid flow; CCFL; Horizontal pipe; One-dimensional model

  • Contribution to proceedings
    The 19th National Symposium on Power and Energy Systems (SPES2014), 26.-27.06.2014, Fukui, Japan

Permalink: https://www.hzdr.de/publications/Publ-20268
Publ.-Id: 20268