Heat transfer at mixed convection in vertical and inclined flat channels of the vacuum chamber of the ITER international thermonuclear reactor

The results are given of the experimental investigation of the intensity of heat transfer from flat surfaces of a model of the vacuum chamber channel of the international thermonuclear experimental reactor (ITER), inclined to the horizontal at an angle of $(5-90)^\circ$, with different heights $(12-50)$ mm, heated length ($1.02$ and $2.48$) m of the model and low velocities of water flow $(0.0067-0.17)$ m/s that are characterized by the values of $\mathrm{Re}= 560-17900$. The specific heat flux on the heat-transfer surfaces is $q=(1.3-24.4)$ kW/m$^2$.The treated range of parameters is characterized by the interaction of forced and natural convection with a significant temperature stratification of the flow in inclined channels. Closing relations are suggested on the basis of the experimental results.