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IFMIF/EVEDA液体リチウムターゲットアセンブリ整流器の計算流体力学を用いた性能評価

An Estimation for flow straighteners of lithium target assembly in IFMIF/EVEDA facility by computational fluid dynamics (CFD)

藤城 興司; 井田 瑞穂; 若井 栄一; 近藤 浩夫; 杉本 昌義; Friedrich, G.*

Fujishiro, Koji; Ida, Mizuho; Wakai, Eiichi; Kondo, Hiroo; Sugimoto, Masayoshi; Friedrich, G.*

国際核融合材料照射施設(IFMIF)は核融合研究開発のための大強度中性子源(14MeV)として核融合炉材料を評価する照射施設であり、その工学実証及び工学設計活動(EVEDA)が日欧協定「幅広いアプローチ(BA)活動」のもとで実施されている。本研究では、液体リチウムターゲット施設の工学実証活動(EVEDA)施設用に設計された2つの整流器について計算流体力学FLUENTを用い、大気圧の条件で整流器内における流速をさまざまに変えて解析を行った。その結果、乱流の運動エネルギーはおもに配管屈曲部と屈曲部$$sim$$整流器間の接続部で生じるが、流れ方向に縮小した設計であっても現在予定している運転条件の下では、開発した整流器は、裕度を保ちつつ整流機能を示すことがわかった。

International Fusion Materials Irradiation Facility (IFMIF) is an activity to evaluate design of the facility of high-intensity neutron source at 14 MeV for nuclear fusion research and development to evaluate the fusion reactor materials. And Engineering Varidation and Engineering Design Activities (EVEDA) has been promoted under "Broader Approach (BA) Activities" with European and Japanese agreement. In this study, computational fluid dynamics, code FLUENT, was used on the two geometry of the Flow Straighteners which were designed for facility of EVEDA. According the analyzed results, they are crified that the flow turbulent kinetic energy has been generated in the junction between bend to Flow Straightener and bend section of piping, and that, it was found to exhibit rectification ability even on shortage geometry in the flow direction of Flow Straightner with margin under the operating condition that are currently scheduled of Lithium Test Loop.

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