压力补偿灌水器结构复杂,工作机理不明确,进一步的研发受到阻碍,对压力补偿腔的数值模拟及可视化试验研究是揭示其工作原理的重要途径。采用流固耦合数值方法模拟不同压力下压力补偿灌水器的工作状况,并制作等比例有机玻璃透明试验件进...压力补偿灌水器结构复杂,工作机理不明确,进一步的研发受到阻碍,对压力补偿腔的数值模拟及可视化试验研究是揭示其工作原理的重要途径。采用流固耦合数值方法模拟不同压力下压力补偿灌水器的工作状况,并制作等比例有机玻璃透明试验件进行可视化试验,测量膜片变形和压力补偿腔内部速度分布,对计算结果进行验证。结果表明,流固耦合数值模拟结果与试验结果吻合较好,并发现在流量稳定阶段,随压力增大,弹性膜片的变形增长率越来越小,在75 k Pa以后膜片出现振动,并在195 k Pa之后完全贴于压力补偿腔顶部,压力补偿灌水器通过弹性膜片的微小变形变化调节出水断面来保持流量稳定,因此弹性膜片的硬度、压力补偿腔出水口和小槽尺寸是决定压力补偿灌水器稳定工作阶段流量以及流态指数的主要因素。该方法为压力补偿灌水器的设计和开发提供了有效途径。展开更多
Thermal mixing and stratification phenomena may occur during the loss of a coolant accident or main steam line break accident in the containment of a Passive Containment Cooling System, or in the suppression pools in ...Thermal mixing and stratification phenomena may occur during the loss of a coolant accident or main steam line break accident in the containment of a Passive Containment Cooling System, or in the suppression pools in BWR. However, the present study pays insufficient attention to the thermal stratification phenomena in the containment of small modular reactors(SMR). In this paper, an investigation on the mixing and thermal stratification phenomena caused by the plumes or buoyant jets in SMR containments was carried out. The experiments were both conducted under non-adiabatic and adiabatic conditions for a steel containment. In each condition, two key parameters, inlet temperature, and flow rate were tested by controlling variables to identify their influence on the thermal stratification phenomenon. The visualization experiments illustrated the jet mixing and stratification development. The experiment results were compared with the numerical computation and they reached a good agreement.展开更多
文摘压力补偿灌水器结构复杂,工作机理不明确,进一步的研发受到阻碍,对压力补偿腔的数值模拟及可视化试验研究是揭示其工作原理的重要途径。采用流固耦合数值方法模拟不同压力下压力补偿灌水器的工作状况,并制作等比例有机玻璃透明试验件进行可视化试验,测量膜片变形和压力补偿腔内部速度分布,对计算结果进行验证。结果表明,流固耦合数值模拟结果与试验结果吻合较好,并发现在流量稳定阶段,随压力增大,弹性膜片的变形增长率越来越小,在75 k Pa以后膜片出现振动,并在195 k Pa之后完全贴于压力补偿腔顶部,压力补偿灌水器通过弹性膜片的微小变形变化调节出水断面来保持流量稳定,因此弹性膜片的硬度、压力补偿腔出水口和小槽尺寸是决定压力补偿灌水器稳定工作阶段流量以及流态指数的主要因素。该方法为压力补偿灌水器的设计和开发提供了有效途径。
基金supported by National Natural Science Foundation of China(No.91326108)
文摘Thermal mixing and stratification phenomena may occur during the loss of a coolant accident or main steam line break accident in the containment of a Passive Containment Cooling System, or in the suppression pools in BWR. However, the present study pays insufficient attention to the thermal stratification phenomena in the containment of small modular reactors(SMR). In this paper, an investigation on the mixing and thermal stratification phenomena caused by the plumes or buoyant jets in SMR containments was carried out. The experiments were both conducted under non-adiabatic and adiabatic conditions for a steel containment. In each condition, two key parameters, inlet temperature, and flow rate were tested by controlling variables to identify their influence on the thermal stratification phenomenon. The visualization experiments illustrated the jet mixing and stratification development. The experiment results were compared with the numerical computation and they reached a good agreement.
