Abstract
This paper deals with radiant characteristics of non-isothermal cylindrical cavities by introducing “effective temperature”.
Radiant characteristics of non-isothermal cavities are represented more simply and clearly by effective temperature than by effective emissivity. It is shown that effective temperature scarcely depends on the wavelength of radiation even for cavities whose temperatures vary considerably along the axes of cavities.
Relation between the temperature distribution and the effective temperature is investigated in detail, and an approximate formula for effective temperature and its parameters are given so that one can calculate the effective temperature of a cavity with an arbitrary temperature distribution.
