ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
FOULING OF A CYLINDRICAL OBSTACLE PLACED IN AN AIR STREAM
要約
The characteristics of carbon-black particles deposition on a cylindrical obstacle placed in a particles-laden air stream were studied. Accumulation of the deposit with time exhibited asymptotic behavior, as commonly observed in particulate fouling of tubular heat-exchangers. However, velocity exerted only a weak effect on the magnitude of the asymptotic deposit, and the effect of increasing the carbon-particle flux at constant velocity was to augment the asymptotic deposit at a rapidly diminishing rate. The asymptotic deposit was found to depend on particles concentration, rather than velocity and carbon-particle flux. To explain the above results, a model inspired by gas-adsorption theory is proposed, based on the concept that the deposit builds up as a non-uniform structure of partially-occupied layers.