矩形并联双通道第一类密度波流动不稳定性实验研究

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Experimental Study on Type I Density Wave Oscillation in Parallel Twin Rectangular Channels under Forced Circulation

CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institute of China, Chengdu, 610041, China

摘要: 以截面尺寸为50 mm×2 mm的矩形并联双通道为实验本体,在系统压力为2～8 MPa范围内,开展强迫循环条件下的第一类密度波流动不稳定性实验研究。在实验参数范围内,获得系统压力(P)、质量流量(G)和入口过冷度(Tsub)等热工参数对流动不稳定界限参数的影响规律;在Npch-Nsub图上给出不稳定点的分布,最后基于实验数据拟合第一类密度波不稳定边界的经验关系式。
- 矩形并联双通道 /
- 强迫循环 /
- 第一类密度波流动不稳定性
Abstract: An experiment has been made on Type I density wave oscillation（D.W.O） in a 50mm×2 mm parallel rectangular channels at the pressure of 2~8 MPa. The region of operation condition in which the Type I appeared was obtained. The effects of system pressure, mass velocity and inlet subcooling on the boundary parameters were also been investigated. Finally, the distribution of instability points was given on Npch-Nsub figure and the empirical correlation of dimensionless boundaries has been made based on the experimental results.
- Parallel rectangular channels /
- Forced circulation /
- Type I D.W.O