Local loss coefficients inside air cavity of ventilated pitched roofs
作者： Lars Gullbrekken , Sivert Uvsløkk , Stig Geving , Tore Kvande
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摘要: Pitched roofs with a ventilated air cavity to avoid snow melt and ensure dry conditions beneath the roofing are widely used construction in northern parts of Europe America. The purpose this study has been determine pressure losses at inlet (eaves) inside consisting friction passing tile battens. These results necessary increase accuracy ventilation calculations pitched roofs. Laboratory measurements, numerical analysis as well by use empirical expressions have study. A large difference local loss coefficients depending on edge design height batten was found. round-edged battens were approximately 40% lower than sharp-edged Furthermore, factor increased increasing batten. found reliably reproduce from measu...
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