Temperature and pressure oscillations induced by steam direct contact condensation in a T-junction with porous inner-structures
Temperature and pressure oscillations induced by steam direct contact condensation in a T-junction with porous inner-structures
复制标题
多孔内部结构 T 形接头中蒸汽直接接触冷凝引起的温度和压力振荡
DOI：
10.1016/j.ijheatmasstransfer.2020.120863
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发表时间：
2021-04
影响因子：
5.2
通讯作者：
Bai Shuanlong
中科院分区：
文献类型：
--
作者：
Wang Jie;Chen Cong;Liang Dingding;Lu Tao;Bai Shuanlong
实验研究了蒸汽质量流量为2 ~ 60kg /h，过冷水流量为0.5 ~ 2m3 /h，过冷水温度为30℃的空t型结和两个多孔内部结构（由两种不同直径的不锈钢球组成）的t型结的蒸汽直接接触冷凝（SDCC）。在不同饱和蒸汽质量流量和过冷水流量条件下，研究了不同孔隙内部结构对温度和压力振荡的影响。结果表明，多孔内部结构显著降低了分支管附近的温度波动。随着孔隙内部结构孔隙度的增加，压力振荡正峰值先增大后减小。通过填充多孔内部结构抑制了压力振荡强度。此外，填充多孔内部结构增加了流动的粘性阻力和惯性阻力，增强了湍流强度。随着多孔内部结构孔隙率的降低，第一主导频率显著增加。特别是当孔隙率ε = 0.318时，第一主导频率的增加尤为明显，最高可达463 Hz。
Steam direct contact condensation (SDCC) has been investigated experimentally with the steam mass flow rate in the range of 2 ~ 60 kg/h, the subcooled water flow rate in the field of 0.5 ~ 2 m3/h and the subcooled water temperature at 30 °C.in an empty T-junction and the T-junction with two porous inner-structures (made up by stainless steel ball with two different diameters). The effects of different porous inner-structures on temperature and pressure oscillations were investigated with different saturated steam mass flow rate and subcooled water flow rate. The results show that the porous inner-structures significantly reduces the temperature fluctuation near the branch pipe. Then, the positive peak value of pressure oscillation increases firstly and then decreases with the increase of porous inner-structures porosity. the intensity (RMS) of pressure oscillations were suppressed by filling the porous inner-structures. Besides, filling the porous inner-structures increases the viscous resistance and inertia resistance of the flow and enhances the intensity of turbulence. So the first dominant frequency increased significantly as the porosity of porous inner-structures decreased. Especially when the porosity ε = 0.318, the increase of the first dominant frequency is particularly evident and the maximum even reached 463 Hz.
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影响因子：
1.7
作者：
G. Patel;V. Tanskanen;E. Hujala;J. Hyvärinen
通讯作者：
G. Patel;V. Tanskanen;E. Hujala;J. Hyvärinen
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DOI：
10.1016/j.ijheatmasstransfer.2010.07.001
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2010-10
影响因子：
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作者：
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DOI：
10.1016/j.ijheatmasstransfer.2016.09.045
发表时间：
2017
影响因子：
5.2
作者：
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通讯作者：
Xinzhuang Wu
影响因子：
2.7
作者：
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S. Li;P. Wang;T. Lu
影响因子：
3.8
作者：
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C. Chan;C.K.B. Lee