纵向涡作用下的CHF预测模型研究

Modelling Study on CHF in Narrow Rectangular Channel With Longitudinal Vortex Generator

纵向涡发生器由于结构简单,生成的纵向涡作用距离远,强化传热效果明显,适合应用在狭窄通道的平行表面上。基于窄间隙矩形通道的流道结构特点,参考圆管环状流临界热流密度(CHF)预测解析模型和肋化通道传热模型,构建了带矩形块纵向涡发生器窄间隙矩形通道内的CHF预测模型,并用带4对矩形块纵向涡发生器窄间隙矩形通道内的CHF实验数据对模型进行了校核,模型预测精度良好。

With relative long influence distance and simple structure, the longitudinal vortex generators（LVGs） can be used in narrow channels with fiat surface. On the basis of an annular flow prediction model for Critical Heat Flux（CHF） and a heat transfer model respectively used in smooth and ribbed circular tube, a new CHF prediction model in rectangular narrow channel with 4 pairs of block LVGs is developed, and this model is validated by comparing with the present experimental data. The predictive accuracy of this model is good.