Abstract
Airflow in the high-speed soft sleeper car of passenger train is complex. To balance the air volume distribution between different rooms, multizone model combined with Computational fluid dynamics (CFD) method is used to guide the design. Multizone network model of the ventilation system including ducts and rooms is established, and CFD method is used to get necessary data for solution of the model, e.g., determine the flow resistance characteristic in irregular duct components. According to the calculating results, ventilation system is adjusted for several times till air volume distribution meets the design requirement. Then, prototype model of the car is set up, and experimental test is carried out to verify the multizone model and calculating results. It proved that method of this paper can be applied to the design of ventilation system of soft sleeper car and similar places.
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