Application of IR thermography as a measuring method to study heat transfer on rotating surface

摘要

This paper presents an experimental and CFD numerical study of convective heat transfer and flow field characteristics in a rotating environment. Surface temperature distribution on a rotating blade was measured by means of infrared thermography. The experimental facility, IR thermography method, and the CFD numerical model that was made according to the actual test rig geometry and operating conditions, are described in detail. For the present study, tests were carried out at relatively low fluid temperatures in several operating points, defined by rotational, Reynolds and hot-to-cool air mass flow ratio. Experimental and numerical results for the observed blade side are compared in terms of surface temperature distribution (2D) and 1D charts along the blade midspan. Temperature distributions are statistically evaluated and show very good agreement.