CAJ | 학술논문

以清华大学研发的多用途小型堆NHR为基础，建立全尺寸、全参数1∶1自然循环试验回路研究零功率摇摆条件下自然循环的流动规律。通过分析几组不同摇摆运动下的实验结果，探讨了单自由度摇摆运动摆角幅值ψm 和摇摆周期 T对自然循环速度的影响，并给出自然循环流速波幅Vo 和摇摆运动参数ψm 与 T之间的线性关系。研究结果表明：ψm 对加热段两侧流速影响最为显著，Vo 随ψm 的变大而增大且两侧流速波动相位相差90°；V o 随 T的增大而减小，流速波动相位差与 T无关；在零功率摇摆条件下，流速波幅的平方V 2o 与ψm 、频率平方 w2d 及当量摇摆半径 Req的乘积呈线性关系。
이청화대학연발적다용도소형퇴NHR위기출，건립전척촌、전삼수1∶1자연순배시험회로연구령공솔요파조건하자연순배적류동규률。통과분석궤조불동요파운동하적실험결과，탐토료단자유도요파운동파각폭치ψm 화요파주기 T대자연순배속도적영향，병급출자연순배류속파폭Vo 화요파운동삼수ψm 여 T지간적선성관계。연구결과표명：ψm 대가열단량측류속영향최위현저，Vo 수ψm 적변대이증대차량측류속파동상위상차90°；V o 수 T적증대이감소，류속파동상위차여 T무관；재령공솔요파조건하，류속파폭적평방V 2o 여ψm 、빈솔평방 w2d 급당량요파반경 Req적승적정선성관계。
Based on a multi‐purpose small nuclear reactor (NHR) developed at Tsinghua University ,a natural circulation experimental loop to study the characteristics of natural circulation under rolling condition with zero power was built .The effect of rolling angleψm and rolling cycle T of single‐freedom rolling motion on natural circulation was explored through the analysis of several groups of experimental results ,and the linear relationships between flow amplitude Vo and rolling motion parametres ψm and T were given .T he results indicate that the obvious influence of rolling angle ψm on flow velocity of two‐side channels of heating section is observed ,and flow velocity wave amplitude Vo increases with ψm .Vo decreases with the increase of T ,and the wave phase of flow velocity fluctuation is unrelated with T .In rolling condition with zero power ,a linear relationship between the V2o and the product of ψm ,the square of frequency w2d and the equivalent rolling radius Req is proved .