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首页> 外文期刊>International Journal of Heat and Mass Transfer >Two-phase Pressure Drops In A Helically Coiled Steam Generator
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Two-phase Pressure Drops In A Helically Coiled Steam Generator

机译：螺旋线圈蒸汽发生器中的两相压降

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摘要

An experimental investigation regarding two-phase diabatic pressure drops inside a helically coiled heat exchanger have been carried out at SIET thermo-hydraulics labs in Piacenza (Italy). The experimental campaign is part of a wide program of study of the IRIS innovative reactor steam generator. The test section consists of an AISI 316 stainless steel tube, 32 m length, 12.53 mm inner diameter, curved in helical shape with a bend radius of 0.5 m and a helix pitch of 0.8 m, resulting in a total height of the steam generator tube of 8 m. The explored operating conditions for two-phase flow experiences range from 192 to 824 kg/m~2 s for the mass flux, from 0 to 1 for the quality, from 1.1 to 6.3 MPa for the pressure, from 50 to 200 kW/m~2 for the heat fluxes. A frictional two-phase pressure drops correlation, based on an energy balance of the two-phase mixture and including the 940 experimental points, is proposed. Comparison with existing correlations shows the difficulty in predicting two-phase pressure drops in helical coil steam generators.
机译：在意大利皮亚琴察的SIET热工实验室对螺旋盘绕式换热器内的两相非绝热压降进行了实验研究。实验活动是IRIS创新型反应堆蒸汽发生器广泛研究计划的一部分。测试部分由长度为32 m，内径为12.53 mm的AISI 316不锈钢管组成，呈螺旋形弯曲，弯曲半径为0.5 m，螺旋螺距为0.8 m，因此蒸汽发生器管的总高度为8 m。探索的两相流操作条件的质量通量范围为192至824 kg / m〜2 s，质量的范围为0至1，压力的范围为1.1至6.3 MPa，范围为50至200 kW / m 〜2为热通量。提出了基于两相混合物的能量平衡并包含940个实验点的摩擦两相压降相关性。与现有相关性的比较表明，难以预测螺旋线圈蒸汽发生器中的两相压降。

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