利用两种缩尺模型研究水电站高大厂房的气流组织分布
Comparison of air distribution in two reduced-scale models for large workplace of hydropower station
摘要：
对呼和浩特水电站地下主厂房1∶50和1∶20两种缩尺比例通风模型的试验结果进行了比较分析。利用粒子图像测速（PIV）技术对1∶50比例通风模型进行了整场试验研究，同时建立了比例尺为1∶20的热态通风模型。通过分析比较两种比例通风模型典型断面（厂房纵向中轴断面、横向中轴断面及过发电机中心的横断面）的流场特性，发现两种比例通风模型流场的试验结果最大误差约为12.1%，在整个研究区域内两种模型的试验结果基本趋于一致。
Abstract：
Compares the experimental results obtained by two ventilation models with the scales of 1∶50 and 1∶20 respectively in underground main workplace of a hydropower station. Measures the whole air velocity field in 1∶50 scale model by particle image velocimetry (PIV) technology and establishes the 1∶20 scale thermal state ventilation model. The comparison and analysis results of air distribution in typical cross sections of the two models show that the maximum relative error of air velocity is 12.1% in the two models, and that there is a good agreement between 1∶50 scale model and 1∶20 scale model in whole air velocity field.
Keywords:similarity theory, hydropower station, ventilation model, particle image velocimetry (PIV) technology