抄録
A number of experiments on this theme have been made with small model houses whose windows are of various sizes. According to the experiments, temperature distribution of ejected air current along the downstream is much similar to that of the upward current from a rectangular heat source.
The writer compared these two cases carefully and has come to the conclusion : As far as the temperature distribution is concerned, the window, which is in vertical plane and ejects the hot stream produced by the indoor fire, can be replaced by the rectangular heat source which is placed in the horizontal plane at the same level of the top of the window. If we assume that there is a high vertical wall above the window, when the horizontal length of the window is shorter than the vertical one, the length of one side of the replaced rectangular heat source is the same as the horizontal length of the window, but the length of the other side must be one-half of the vertical length of the window. But when the horizontal length of the window is longer than the vertical one, the size of the replaced rectangular heat source is the same as that of the window. The above facts are explained physically in this report.
The temperature distribution of the upward current from a rectangular heat source is already reported by the same writer1). When the result of this study is applied, the temperature distribution of the ejected current from a rectangular window can be gained if only the size of the window and the quantity of heat ejected from the window per unit time are given.
