Measurements were made of turbulence characteristics, mean flow and heat-transfer parameters in the entrance region of an annulus of radius ratio 0.25 over a range of Reynolds numbers from 0.13 × 105 to 1.9 × 105. Tests were carried out with and without a turbulence promoter which gave a large enhancement of free stream turbulence at inlet. The results were compared using a prediction method based on the two equation turbulence model. Good agreement was obtained both in the entrance region and the fully developed situation and with and without the turbulence promoter providing proper values of the initial turbulence energy and dissipation rate were used.
|Number of pages||9|
|Journal||International Journal of Heat and Mass Transfer|
|Publication status||Published - 1 Jan 1977|