Effects of altitude and sample orientation on heat transfer for flame spread over polystyrene foams

摘要: Experiments were carried out on insulation foams of EPS and XPS in a small-scale flame spread experimental bench the Tibetan plateau area Lhasa plain Hefei both China, respectively. The effects altitude sample orientation behavior quantitatively analyzed. results show that extinction secondary ignition occur for plateau, as oxygen concentration air entrainment is influenced by generated smoke pool fire zone. speed increases with incline angle Hefei, but (downward spread), decrease angle, especially Lhasa. It found heat transfer process different XPS. transition zone plays an important role over downward resulting total including convective radiative \( q_{\text{f}}^{\prime \prime } \delta_{\text{f}} \) conductive q_{\text{c}}^{\prime L increase while EPS, surface dominates two places.