本文選題：再淹沒 + RELAP　； 參考：《核科學與工程》2017年05期

【摘要】：基于ABB Atom 3×3棒束再淹沒實驗,運用RELAP5建立其實驗裝置的定流量再淹沒計算模型,通過與實驗結(jié)果做比對驗證模擬的有效性,研究在高、低兩種注水流量下從底部再淹沒高溫棒束通道時的不同驟冷現(xiàn)象,分析期間的流動形態(tài)、傳熱特性,液位進程,先驅(qū)冷卻效果差異等。模擬結(jié)果表明:低流量下主液位落后于驟冷前沿,高流量下驟冷前沿明顯落后于主液位;通過對比發(fā)現(xiàn)在高流量下的高液位為高溫壁面帶來更強的先驅(qū)冷卻,使壁面溫度更快的降到再濕溫度,而低流量下幾乎勻速上升的液位變化進程對前沿下游的高溫壁面冷卻較慢,需要更長的時間才能降到再濕溫度。這些分析將為研究此模型下的重力注水打下堅實的基礎(chǔ)。
[Abstract]:Based on the experiment of ABB Atom 3 脳 3 rod beam submergence, the calculation model of constant flow reflooding is established by using RELAP5. The validity of the simulation is verified by comparing the experimental results with the experimental results. Under low water injection flow rate, different quench phenomena occurred when the channel was submerged from the bottom of the high temperature rod bundle, and the flow pattern, heat transfer characteristics, liquid level process and the difference of precursor cooling effect during the period were analyzed. The simulation results show that the main liquid level lags behind the quenching front at low flow rate, and the quenching front obviously lags behind the main liquid level at high flow rate, and it is found that the high liquid level at high flow rate brings stronger pioneer cooling to the wall at high temperature. The temperature of the wall decreases to the wetting temperature more quickly, while the process of the level change of the liquid level increases almost uniformly under the low flow rate, and the cooling of the wall surface of the front and downstream high temperature is slower, and it takes longer time to reduce to the rewetting temperature. These analyses will lay a solid foundation for the study of gravity injection under this model.
【作者單位】： 上海交通大學機械與動力工程學院;中國核動力研究設(shè)計院核反應(yīng)堆系統(tǒng)設(shè)計技術(shù)重點實驗室;
【基金】：中國核動力研究設(shè)計院核反應(yīng)堆系統(tǒng)設(shè)計技術(shù)重點實驗室基金資助(LRSDT2017402)
【分類號】：TL364.4

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本文編號：1966109