A STUDY OF THE DYNAMIC-RESPONSE OF A LOCAL HEAT-FLUX PROBE

A study of the transient and frequency response of a heat flux probe is reported. The probe consists of a metallic film sensor deposited onto a substrate and covered by a thin protective coating. This study considers the case of constant sensor temperature operation with the probe mounted in an isothermal wall and one probe surface exposed to a convecting environment. A two-dimensional numerical analysis of the probe subjected to both step change and periodic boundary conditions is presented. The effect of probe design on temporal and frequency response and probe sensitivity is demonstrated.