Ventilation Model Experiment And Research Of Dynamo Floor In LangYa Shan Hydropower Station's Underground Houses

The arrange size of machine electricity equipments of LangYa Shan hydropower station is very compact, and the craft form is also different from the formerly pump water station. Different underground powerhouses of water power station has different ventilation character though some common character. So, air distribution and flow study of the water station has its particularity and application value. This thesis combined with the commissioned scientific research about ventilation model experiment of LangYa Shan hydropower station's underground houses, first make out the history, status, development trend and existent problem of ventilation and air condition technology application in underground hydropower station at home and abroad by indexing and checking the related large quantity technology references and engineering analysis.This establish a well base for study of the model experiment.Design the model rightly is a premise of air distribution model test in LangYa Shan hydropower station. The author establish experiment model according to the similarity theories. Adopting Archimedes number Arq as similarity standard, the author determine every kind of similarity scale according to geometry scale 1/18 and other limit condition, at the same time, complete organization of model essence, simulation heat source system, design and arrangement of air supply and exhaust system according to every kind of similarity scale.Based on the experiment conclusion of before period of ventilation model experiment of LangYa Shan hydropower station's underground houses,the keystone of current period is study about air distribution and flow on dynamo floor.The research is divided into 3 steps, each step acquire relevant conclusion. First, the main purpose is to validate the effect and credibility of the commissioned project. The author does measuring many times at the same condition and analyzes carefully the error of temperature and velocity. Next, by changing air supply(14.5×10~4m~3/h,17.4×10~4m~3/h,20.0×10~4m~3/h) and air exclusion proportion between upriver and downriver of dynamo floor(1∶2,1∶3,1∶4),we measure the temperature field and velocity field of dynamo floor's workaround to find the law of temperature and velocity, at the same time,value the ventilation effect by using value index. The author make out the best air project: 17.4×10~4m~3/h, 1∶3, even supply. At the same time, the author deduces the hypostasis form of distribution of no unit temperature difference of dynamo floor's workaround...