Cylindrical lamps are usually equipped in the tubular UV reactor to
offer UV radiation. This paper describes the axisymmetric
characteristics of UV radiation from the cylindrical UV lamp.
Axisymmetric lamp emission models are developed in a two-dimensional
axisymmetric space for the line source, the superficial source and the
volumetric source. The present axisymmetric lamp emission models are
easy to understand and of simple mathematical expressions. The
experimental data in literature is used to validate the present
axisymmetric lamp emission models. Good agreements have been obtained
between the experimental data and the computations. A comparison show
that the present models obtain the identical results as previous models.