Magnetohydrodynamic and Thermal Issues of the SiCf/SiC Flow Channel Insert
Magnetohydrodynamic and Thermal Issues of the SiCf/SiC Flow Channel Insert
复制标题
DOI：
10.13182/fst06-a1226
复制
发表时间：
2006-07
影响因子：
0.9
通讯作者：
S. Smolentsev;N. Morley;M. Abdou
中科院分区：
文献类型：
--
作者：
S. Smolentsev;N. Morley;M. Abdou
摘要在双冷却剂铅锂（DCLL）包层中，关键元件是由碳化硅复合材料（SiCf/SiC）制成的流道插入件（FCI），它起到电绝缘和热绝缘的作用。以美国DEMO DCLL为原型，对FCI中最重要的磁流体动力学（MHD）和热问题--包层极向通道中的MHD流动和传热进行了数值模拟研究。数学模型包括充分发展流动的二维动量和诱导方程以及三维（3-D）能量方程。已经考虑了两种FCI修改，一种没有压力均衡开口，另一种具有压力均衡槽。以SiCf/SiC的电导率和热导率为参数，以参数形式进行计算。在DEMO反应堆条件下，FCI的参数已被确定，导致低的MHD压降和低的热量从增殖到氦流泄漏。本文还讨论了压力均衡开口的作用，3-D流动的影响，和SiCf/SiC各向异性的影响。
Abstract In the dual-coolant lead lithium (DCLL) blanket, the key element is the flow channel insert (FCI) made of a silicon carbide composite (SiCf/SiC), which serves as electric and thermal insulator. The most important magnetohydrodynamic (MHD) and thermal issues of the FCI, associated with MHD flows and heat transfer in the poloidal channel of the blanket, were studied with numerical simulations using the U.S. DEMO DCLL design as a prototype. The mathematical model includes the two-dimensional momentum and induction equations for a fully developed flow and the three-dimensional (3-D) energy equation. Two FCI modifications, one with no pressure equalization openings and one with a pressure equalization slot, have been considered. The computations were performed in a parametric form, using the electric and thermal conductivity of the SiCf/SiC as parameters. Under the DEMO reactor conditions, parameters of the FCI have been identified that result in low MHD pressure drop and low heat leakage from the breeder into the helium flows. This paper also discusses the role of the pressure equalization openings, 3-D flow effects, and the effect of SiCf/SiC anisotropy.