摘要
在空泡物理和自然循环重点实验室氟里昂热工实验装置上进行了CHF实验 ,实验段为9 5×1 0mm元件管组成的 4× 4棒束 ,并对其开展了 4× 4棒束CHF流体模化研究。在压力 1 5 9～ 2 73MPa、质量流速 4 88～ 2 0 80kg (m2 ·s)、临界含汽率 -0 2 0～ 0 3 0的工况范围内 ,采集了 1 70个 4× 4棒束CHF实验数据 ,并与压力 9 9～ 1 6 2MPa、质量流速 2 74～ 1 4 73kg (m2 ·s)、临界含汽率 -0 2 0～0 3 4工况范围内 ,以水为工质相同棒束实验段内的 2 0 6个棒束CHF实验数据进行比较 ,发现Ahmad补偿失真模型、张振杰模型和Stevens Kirby模型在上述工况范围内不再适用于棒束CHF的模化 ,这些模型的预测偏差均大于 2 0 %以上 ,而且棒束CHF模化的流量模化因子k明显地受压力、质量流量和入口含汽率的影响。据此提出适用于上述工况范围内 4× 4棒束CHF模化的流量模化因子k的关系式 ,其CHF预测偏差在± 1 5 %以内 ,均方根误差为 7 0 5 %。
The CHF experiments were carried out with 4×4 bundle of 9.5×1 rods and 1 000 mm heating length on Freon-12 thermal hydraulic test facility of BPNC. Under conditions of 1.59～2.73 MPa, 488～2 080 kg/(m 2·s) and -0.20～0.30 of the critical quality, 170 test data were collected, which are in accord with 206 CHF experimental data with 4×4 bundle in water under conditions of 9.9～16.2 MPa, 274～1 473 kg/(m 2·s) and -0.20～0.34 of the critical quality. Compared with CHF data between water and Freon-12, it was discovered that all of S.Y.Ahmad's compensation distortion model, Zhangzhenjie's model and Stevens-Kirby's model didn't fitted for bundle, with their error deviations beyond 20%. It was obvious that flow scale factor k was influenced by mass flow rate, pressure and the inlet quality. The correlation of flow scale factor k was then proposed, which improved the prediction precision of CHF modeling with the deviations within ±15% and the r.m.s error of 7.05%.
出处
《核科学与工程》
CSCD
北大核心
2002年第4期309-313,共5页
Nuclear Science and Engineering
