高流速下窄矩形通道内临界热流密度试验研究

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Experimental Investigation on the CHF of Rectangular Channel with Narrow Gap under High Mass Velocity

Key Laboratory of Bubble Physics and Natural Circulation, Nuclear Power Institute of China, Chengdu, 610041, China

摘要: 在常压下,对具有窄间隙的矩形通道进行了下降流大流速临界热流密度试验研究。研究发现:大流速下临界热流密度随着流速的增加而呈线性增加,随出口含汽量的增加而减小。Sudo公式的预测值较试验值要小。在入口参数相同时,即相同的入口过冷度和质量流速式矩形通道的长度对临界热流密度的影响较小;如果从出口质量流速和出口含汽量来看,在相同的出口参数下,长度的增加将显著降低临界热流密度。
- 传热 /
- 临界热流密度 /
- 矩形通道 /
- 含汽量 /
- Suod公式
Abstract: An experiment, focused on the down flow CHF in rectangular channel with narrow gap, was performed under high mass velocity and low outlet pressure. The results show that CHF almost linearly goes up while mass velocity is increased, and while the exit quality rises, CHF falls down. The prediction of Sudo correlation underestimates experimental data. When inlet parameter is the same, the length of rectangular has little effect on CHF; but when the exit parameter is considered, the longer the channel is, the lower CHF is.
- Heat transfer /
- Critical heat flux （CHF） /
- Rectangular channel /
- Mass quality /
- Sudo correlation