截面几何形状对并行通道密度波脉动特征影响初步研究

Study on Density Wave Oscillation in Parallel Channels by Section Form

基于170个并行圆管和窄间隙矩形通道间密度波型脉动实验数据点，在统一的密度波型脉动实验方法、脉动识别方法和实验数据分析处理方法的条件下，研究了圆管和窄间隙矩形通道的脉动规律的异同。结果表明，在压力1．0～19．2MPa、质量流速101．9～1200．0kg·m-2·s^-1、进口过冷度18．0-85．2℃时，当量直径相当的圆管和窄间隙矩形通道对密度波型脉动边界规律没有影响。

Based on 170 density wave oscillation experimental data from parallel round tube and narrow rectangular channel, the experiment method, identification method of oscillation and analysis method of experimental data have be uniformed, and the oscillation boundary of round tube and narrow rectangular channel have be analyzed. The investigation results show that the oscillation boundary is not affected by the channel section forms with identical equivalent diameter with pressure 1.0--19.2 MPa, mass flux 101.9-1200.0 kg.m-2-s-1 and inlet sub cooling 18.0--85.2%].