Numerical Investigation of Temperature Distribution in a Diffuser Equipped with Helical Tape

Abstract

The effect of helical tape inside a conical diffuser on the temperature distribution is examined. In the present paper helical tape with different pitches (20 mm, 25 mm, and 30 mm) and different tape geometries (H=10mm, 15mm) with the same pitch (30mm) are studied in order to observe their effect on the temperature distribution. The length of diffuser, inlet diameter, outlet diameter, and the divergent angle are kept constant for all pitches of tape. The analysis is carried out using CFD software using k-ε turbulence model. The results show that small pitch gives better distribution of temperature, and increasing tape height improves the distribution in the radial-tangential direction.