用模型研究方法对两几何相似的封闭空间内自然对流换热进行了对比实验。两者的Gr数和边界条件都尽量保持一样,结果获得了良好的一致性。实验还证明即使在高Gr数范围内(Gr≥10~(10)),也有必要在原型和模型中保持相近的Gr数值,不然会引起两者温度场发生差异。 The model experiment is used to compare the natural convection heat transfer in a closed space with two geometric similarities. The Gr numbers and the boundary conditions of both are kept as same as possible and the results are in good agreement. Experiments also show that even in the high Gr range (Gr ≥ 10 ~ (10)), it is necessary to maintain a similar Gr value in the prototype and the model, otherwise it will cause the difference between the two temperature fields.