Experimental Study of Thermal Behavior of Insulation Material Rigid Polyurethane in Parallel, Symmetric, and Adjacent Building Façade Constructions.

摘要: Both experimental and theoretical methods were proposed to assess the effects of adjacent, parallel, symmetric exterior wall structures on combustion flame spreading characteristics rigid polyurethane (PUR) foam insulation. During PUR specimens, leading edge was found transfer from a unique inverted 'W' shape an 'V' during propagation. This phenomenon is attributed related boundary layer theory. The adjacent facade angle rate height shown be nonlinear, as result combined influences heat transfer, radiation angle, chimney restriction effects. A critical around 90 degree with maximum thermal hazards outwards by parallel fire observed consistent mass loss tendencies. For narrow spacing configurations or angles (e.g., 60 degrees), phenomenological two-pass processing in conjunction showed that increased preheating lengths associated enhanced transfer. results this study have implications concerning design safe for high-rise buildings, provide better understanding downward over PUR.