E203 ディスク式絞り機構からの単相及び二相流の放出実験(OS9 熱・流動(試験))

概要

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The disk-type flow contraction can be seen at the opening condition of safety or relief valves. The discharging flow rate is restricted with the minimum flow area between disk and pipe end. The flow rate is usually smaller than the calculation with the minimum flow area due to the vena contraction. The discharging flow rate of liquid was measured at the different lift and seat configuration. The liquid flow rate was affected with the lift and seat due to the different formation of vena contraction. The two-phase discharging flow rate was also measured and compared with the non-equilibrium critical flow model. The two-phase flow rate was affected not only with the vena contraction but also with the critical flow rate. It was suggested that the discharging coefficient of two-phase was larger than that of single-phase flow. The single and two-phase discharging behavior was carefully observed by using the transparent disk.
一般社団法人日本機械学会の論文
2011-06-22