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辐射多孔体传热特性的研究盖州

2021-02-20 14:26:08  精造五金网

辐射多孔体传热特性的研究

STUDY ON THE HEAT-TRANSFER SPECIALITY OF RADIANT

POROUS BODYXing Guiju  Li Wenzhong

Tang Tiexun*

Abstract:Regarding radiant porous body with square apertures as object,two kinds of heat-transfer mathematical models are set up,one only considers radiation effect and the other considers both radiation and conduction.The temperature distribution in aperture and directionally effective radiation regularity are analyzed by numerical calculation.It is testified by quasi-industry burning aperture experiment,and the result is in accordance with theoretical calculation.This research result provides some theoretical and practical basis for wide application of the energy-saving component.

Keywords:radiant porous body square aperture effective radiation temprature distribution numerical calculation energy-saving引言近些年来在冶金、化工、热动力及太阳能利用等方面广泛应用的新型节能元件——辐射多孔体,又称多孔隙固体壁、蜂窝体、辐射栅、辐射网,它是一种安装在热空间内使气体易通过,热射线难于通过的用陶瓷或金属等材料制成的多孔隙固体。它的多孔性,使之具有很大的几何表面积,因而能够把燃烧气体显热高效地转换成固体辐射热;又由于辐射传热的特性,使它向上游的固体辐射大于向下游的固体辐射。这一特性对于实现节能降耗具有深远的意义。

关于辐射多孔体传热特性的理论研究,日本人越俊亮三等在这方面作了许多工作,国内也有一些学者就辐射与对流复合传热方面进行过探讨。

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