CFD Analysis of Effect of Helix Rib on Flow and Heat Transfer of Supercritical Water in Square Annular Channel
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摘要: 采用计算流体力学(CFD)数值模拟方法对光滑方环管和带螺旋肋片方环管内超临界水传热特性进行初步研究。计算结果表明,光滑方环管内超临界水的传热特性存在强烈的周向不均匀性;螺旋肋片的加入促使流道内出现了垂直于主流方向的二次流体,增强了流场内的搅混,强化了方环管内的传热特性,并且极大地降低了周向上的传热不均匀性,能够有效地防止局部热点的出现;另一方面,螺旋肋片的加入增加了方环管内的摩擦压降。在对超临界水冷堆(SCWR)螺旋肋片进行结构参数优化设计时,需要从传热、流场搅混、压降等几个方面综合考虑。
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关键词:
- 超临界水堆 /
- 计算流体力学(CFD) /
- 螺旋肋片 /
- 方环管 /
- 流动传热特性
Abstract: This paper presents a primary numerical simulation on the heat transfer behavior of supercritical water in smooth square annular channel and square annular channel with helix rib.The simulation results indicated that the heat transfer behavior of supercritical in smooth square channel is greatly non-uniformity in circumference.The helix rib can enhance the heat transfer in the square annular channel and reduce the circumferential non-uniformity of heat transfer.In addition,the helix rib will increase the flow resistance in the square annular channel,which will add more works to the main pump.So,there is need to consider the heat transfer,flow mixed and flow resistance comprehensively in the design of the helix rib of SCWR.-
Key words:
- SCWR /
- Computational Fluid Dynamics /
- Helix rib /
- Square annular channel /
- Flow and heat transfer
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