抄録
Experimental results on the convection heat transfer coefficient on the outside surface of building in relation to the wind speed and direction are described. The twin heat flow panels as shown in Fig. 2.2-2.4 specifically designed for this study were mounted side by side on the outside wall of the test building. This principle eliminates the radiation exchange between the surface and atmosphere and between the surface and surroundings by having the surface temperatures of two panels adjusted to be slightly different, thus the convection portion of outside film coefficient can be obtained from equation (2.6). §3 discribes the experimental results with the building the north wall of which is faced with open field. The wind speed and direction was measured at 8 meters above the roof and air flow velocity near the surface at 30cm apart from the wall surface by hot-wire anemometer. For the windward surface the air flow velocity near the surface was found to be 1/3-1/5 times the wind speed and 1/8-1/10 for the leeward surface as shown in Fig. 3.4-3.6. The relationships between wind speed and convection heat-transfer coefficient are shown in Fig. 3.9-3.13, and the relationships between air flow velocity near the surface and convection heat-transfer coefficient are shown in Fig. 3.16-3.18.
