边界元法在辐射换热中的一个应用

AN APPLICATION OF BOUNDARY ELEMENT METHOD TO RADIATION HEAT TRANSFER

运用Stokes公式及边界元理论,导出了辐射换热计算中的辐射角系数与相互辐射面积的计算基本公式。通过四个典型例子的计算,结果与精确解加以对比,表明本方法计算可靠、稳定,具有输入数据少,准确度高等优点。分析了影响计算准确度有关因素,对所遇到的奇异积分给予了有效的处理。

A new radial shearing interferometry optical system with two Fresnel zone plates is presented, and according to this system, the method to recover the original wavefront was deduced. In order to use this optical system to test the phase object, experiments for measuring the temperature field of air on top of a clubbed hot copper was im- plemented. By Captured the interference pattems and computed the difference of wavefront, the temperature field was recovered. Result is comparative to that of heat electric for measuring the phase object which cross section is couple. It is shown that this optical system is sensitive and fit broader but length along the light way is shorter.