泸定水电站大型长廊式调压井规模庞大、结构复杂、施工通风散烟难度大，传统的施工通风设计无法掌控真实通风效果，可能导致通风效果差、资源浪费。采用基于流体力学的三维数值模拟，研究其在不同通风方式下的通风流场形态，定量分析布帘设置、负压风机设置和最佳数量、完全负压风机方案等对改善其施工通风散烟效果的作用，为通风方案的优化设计提供理论依据和技术支持。

The ventilation of Large Gallery-type Surge Chamber for Luding Hydropower Station is difficult to arrange for its’ large excavation volume and complex shape. And the traditional ventilation design may result in poor effect and resource waste without real flow field. 3-D numerical simulation of ventilation scheme based on fluid mechanics theory ,which can simulate flow field factually and analyze the ventilation effects of different ventilation modes quantitatively, such as cloth curtain’s settings, negative pressure fan’s setting and the optimal number and so on. The results show that this method can provide the theoretic proof and technical support for the ventilation design.