Abstract The dual coolant lithium lead (DCLL) is a candidate to be an effective breeding blanket (BB) concept for nuclear fusion technologies. One critical point of this design is the magnetohydrodynamic (MHD) effects involving Lorentz damping force which produces relevant pressure drop in the eutectic flow. In the framework of the European DEMO, the application of sandwich-like steel–alumina–steel flow channel insert (FCI) seems to be the best solution to reduce the pressure drop by electrically decoupling the liquid PbLi from the Eurofer walls. The impact of the FCI on the PbLi velocity profile is analyzed in this work with a CFD solver implemented on OpenFOAM. Under the assumption of non-buoyant fully developed channel flow the temperature map in the channel is computed. Based on the temperature field, the induced deformation is evaluated. The effects of the FCI deformation and possible rupture of the FCI on the velocity profile and on the corresponding pressure drop are then parametrically investigated. Results show that the deformation of the FCI and the possible break in the Hartmann wall do not lead to significant variations in the pressure drop from the case of intact FCI in a wide range of interaction parameters.

中文翻译：

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流道嵌件变形对 DCLL 毯式通道中液态金属流动的影响分析

摘要 双冷却剂锂铅 (DCLL) 是核聚变技术的有效育种毯 (BB) 概念的候选者。这种设计的一个关键点是涉及洛伦兹阻尼力的磁流体动力学 (MHD) 效应，它会在共晶流中产生相关的压降。在欧洲 DEMO 的框架内，夹层状钢-氧化铝-钢流道插件 (FCI) 的应用似乎是通过将液态 PbLi 与 Eurofer 壁电解耦来降低压降的最佳解决方案。在这项工作中，使用在 OpenFOAM 上实施的 CFD 求解器分析了 FCI 对 PbLi 速度剖面的影响。在非浮力完全发展的通道流动的假设下，计算通道中的温度图。基于温度场，对诱导变形进行评估。然后参数化研究 FCI 变形和 FCI 可能破裂对速度剖面和相应压降的影响。结果表明，FCI 的变形和 Hartmann 壁的可能破裂不会导致与完整 FCI 的情况相比，在各种相互作用参数下的压降发生显着变化。