1. 燕山大学车辆与能源学院
2. 中国海关管理干部学院
纸质出版:2025
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王强, 杨洲, 许玉婷, 等. 窄矩形通道自然循环逆流失稳特性数值研究[J]. 核科学与工程, 2025,45(6):1077-1088.
王强, 杨洲, 许玉婷, et al. 窄矩形通道自然循环逆流失稳特性数值研究[J]. 2025, 45(6): 1077-1088.
王强, 杨洲, 许玉婷, 等. 窄矩形通道自然循环逆流失稳特性数值研究[J]. 核科学与工程, 2025,45(6):1077-1088. DOI: 10.20190/j.cnki.02580918.202506003.
王强, 杨洲, 许玉婷, et al. 窄矩形通道自然循环逆流失稳特性数值研究[J]. 2025, 45(6): 1077-1088. DOI: 10.20190/j.cnki.02580918.202506003.
窄矩形通道以其独特的尺寸及换热性能广泛应用于各种工业系统,但两相流动不稳定性限制了其进一步的发展。本文以50 mm×3 mm×1 000 mm的窄矩形通道为研究对象,构建了窄矩形通道自然循环系统,并基于已有实验数据结果进行了模型验证。研究低压下系统流动不稳定性,发现了带有冷段逆流的大幅度流量振荡现象。分析结果表明,此类流动不稳定性存在4个阶段:回路阻塞、稳压器回流、逆流冲击以及恢复阶段。流动不稳定性产生机理与系统特殊尺寸以及运行工况有关。窄矩形通道在低压低流量高加热功率下极易产生阻塞流动的大量气泡;位于加热段上游的稳压器为流量波动提供充足空间与驱动力;上升段内逆流冲击发生后系统流量处于较低状态,进而极易从短暂稳态过渡到流量振荡状态。将稳压器连接至加热段下游,以及增大冷段逆流节流系数,都对此类流动不稳定性具有抑制作用。
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Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, School of Nuclear Science and Technology, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China,Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, School of Nuclear Science and Technology, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China,Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, School of Nuclear Science and Technology, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China,Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, School of Nuclear Science and Technology, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China.Improvement of RELAP5 code for density wave instability analysis in parallel narrow rectangular channels[J].Annals of Nuclear Energy,2018.
Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, College of Nuclear Science and Technology, Harbin Engineering University, Harbin, Heilongjiang 150001, China,Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, College of Nuclear Science and Technology, Harbin Engineering University, Harbin, Heilongjiang 150001, China,Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, College of Nuclear Science and Technology, Harbin Engineering University, Harbin, Heilongjiang 150001, China,Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, College of Nuclear Science and Technology, Harbin Engineering University, Harbin, Heilongjiang 150001, China,Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, College of Nuclear Science and Technology, Harbin Engineering University, Harbin, Heilongjiang 150001, China.An investigation on flashing-induced natural circulation instabilities based on RELAP5 code[J].Annals of Nuclear Energy,2018.
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