Advancement about ventilation air distribution and reduced-scale model test for underground large plants in hydropower stations

Presents the main ventilation air distribution modes for the underground powerhouse in hydropower stations, including stratified air conditioning, up (or ceiling) supply, bottom supply and series uniflow type ventilation.Describes the key technical points, model test theory and similar scale, model design for the air distribution model test, and fire smoke extraction model test, as well as PIV measurement technique. Sums up the situations of ventilation air distribution model test and fire smoke extraction model test for the typical hydropower stations in China.