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首页> 外文期刊>International Journal of Heat and Mass Transfer >Heat transfer characteristics of subcooled water in a hypervapotron under high mass fluxes and high heat fluxes
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Heat transfer characteristics of subcooled water in a hypervapotron under high mass fluxes and high heat fluxes

机译：高通量和高通量下超蒸发器中过冷水的传热特性。

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In order to investigate the heat transfer characteristics of hypervatron in the divertor dome of the International Thermonuclear Experimental Reactor (ITER), the off-center electrically heating method was used simulate the one-side heating condition in the engineering application. The heat transfer experiments of subcooled water were carried out in a vertically upward hypervapotron under the system parameters as follows: system pressure P = 2.7, 3.2, 3.7 MPa, mass flux G = 2000-5000 kg.m(-2).s(-1), and equivalent one-side radiating heat flux q(e) = 2-5 MW.m(-2). The effects of parameters on heat transfer were discussed in detail. The results show that the heat transfer coefficient h is significantly affected by G in the single phase (SP) region; the h is synthetically influenced by P, G, q in the partially boiling (PB) region; the h is only affected by q in the fully developed boiling (FDB) region. The experimental data were compared with the typical correlations in single phase region and subcooled boiling region, respectively. The results show that the Dittus-Boelter correlation and the modified Shah correlation have good agreement with the experimental data. The typical CHF correlations for smooth tubes were assessed by the CHF data, the results indicate that experimental Bo(cr) are overpredicted by most CHF correlations, so it can be speculated that the hypervapotron can obtain higher CHF values than smooth tubes. (C) 2018 Elsevier Ltd. All rights reserved.
机译：为了研究国际热核实验堆（ITER）滤池圆顶中超电子的传热特性，在工程应用中采用偏心电加热方法模拟了单侧加热条件。过冷水的传热实验是在垂直向上的超高压釜中进行的，系统参数如下：系统压力P = 2.7、3.2、3.7 MPa，质量通量G = 2000-5000 kg.m（-2）.s（ -1），以及等效的一侧辐射热通量q（e）= 2-5 MW.m（-2）。详细讨论了参数对传热的影响。结果表明，在单相（SP）区域，传热系数h受G的影响显着。 h在部分沸腾（PB）区域受P，G，q合成影响; h仅在完全展开的沸腾（FDB）区域中受q影响。将实验数据分别与单相区和过冷沸腾区的典型相关性进行了比较。结果表明，Dittus-Boelter相关性和修正的Shah相关性与实验数据吻合良好。通过CHF数据评估了光滑管的典型CHF相关性，结果表明大多数BoF相关性都对实验Bo（cr）进行了过度预测，因此可以推测，超vapotron可以获得比光滑管更高的CHF值。 （C）2018 Elsevier Ltd.保留所有权利。

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