Effect of multiple holes on the performance of sparger during direct contact condensation of steam
Effect of multiple holes on the performance of sparger during direct contact condensation of steam
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DOI：
10.1016/j.expthermflusci.2003.10.002
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发表时间：
2004-06
影响因子：
3.2
通讯作者：
S. Cho;S. Chun;W. Baek;Y. Kim
中科院分区：
文献类型：
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作者：
S. Cho;S. Chun;W. Baek;Y. Kim
针对池内压力振荡和热混合问题，对I型分布器的性能进行了实验研究。它的间距与孔直径，P/D，从2到5不等。试验条件仅限于凝结振荡状态。在本研究中，两种不同的孔模式，交错和平行类型，在各种测试条件下使用。压力脉冲的幅度在大约45-85 °C的池温度范围内显示出峰值，其取决于P/D和蒸汽质量通量。布孔方式对压力载荷的影响相对小于P/D。结果表明，主频率随池水过冷度和P/D的增大而增大。主频率的相关性提出的间距与孔直径比和其他无量纲热工水力参数。
An experimental study has been carried out to investigate the performance of a I-type sparger in view of pressure oscillation and thermal mixing in a pool. Its pitch-to-hole diameter, P/D, varies from 2 to 5. The test conditions are restricted to the condensation oscillation regime. In the present study, two different hole patterns, staggered and parallel types, are employed under the various test conditions. The amplitude of the pressure pulse shows a peak at the pool temperature range of around 45–85 °C, which depends on P/D and the steam mass flux. The effect of the hole pattern on the pressure load is relatively smaller than that of P/D. The results show that the dominant frequency increases with the subcooling temperature of pool water and P/D. A correlation of the dominant frequency is proposed in terms of the pitch-to-hole diameter ratio and other dimensionless thermal hydraulic parameters.