The present study deals with the experimental and numerical investigation of steady combined laminar mixed convection and surface radiation heat transfer in the air-filled enclosure subjected to a constant heat flux supplied to the vent side of the cavity. Experimental results are presented for heat inputs, $\text{Q}$ = 3.19 W–16.71 W, Reynolds number, $\text{Re}$ = 4814–166385, and Richardson number, $\text{Ri}$ = 0.1–25. In the present study, the numerical simulation is also performed in the two–dimensional vented cavity to enrich the experimental work for aspect ratio, A = 1–5, and surface emissivity, ε = 0.05–0.85. The momentum and energy equations under Boussinesq approximations are solved using a well-known finite-volume method, and numerical code is developed in Fortan 90 for getting all numerical results. Based on the experimental data, correlations are developed for the Nusselt number and maximum temperature of the heated surface.

本研究涉及在空气填充外壳中稳定组合层流混合对流和表面辐射传热的实验和数值研究，该外壳受到供应给空腔通风口的恒定热通量的影响。给出了热输入的实验结果，$\text{问}$ = 3.19 W–16.71 W，雷诺数， $\text{关于}$ = 4814–166385，和理查森数， $\text{里}$ = 0.1–25。在本研究中，数值模拟也在二维通风腔中进行，以丰富纵横比 A = 1-5 和表面发射率 ε = 0.05-0.85 的实验工作。Boussinesq 近似下的动量和能量方程使用众所周知的有限体积方法求解，并在 Fortan 90 中开发数值代码以获得所有数值结果。根据实验数据，开发了努塞尔数和加热表面最高温度的相关性。