| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2010: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Research Abstract |
The safety or relief valves to depressurize the pressure vessel are recognized as the most important safety devices for boiler and nuclear facilities. The discharging flow is usually restricted with the minimum flow area between disk and seat. The flow rate is significantly affected with the vena contraction at minimum flow area, the delay of expansion and the non-equilibrium. The simple disk-type flow contraction was fabricated to measure the discharging flow rate at different valve lifts, disk materials and seat configurations. A lot of knowledge such as the significant non-equilibrium was obtained from the comparison of the experimental results with the flow model.
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