Numerical and Experimental Study of Optimizing Vertical Wind Tunnel Nozzle

Abstract

Nozzle is one of the main part of vertical wind tunnel, nozzle length is an important parameter in this kind of wind tunnel. So by reducing the length of nozzle, the cost of wind tunnel building will be decreased. In this article, the air flow in the nozzle has been modeled by using FLUENT software and nozzle length optimized. For reducing the nozzle length, inlet to outlet area ratio, nozzle length to inlet diameter ratio and also nozzle configuration has been studied. Numerical results shows a nozzle with inlet to outlet area ratio 6.25, ratio of length to diameter 0.9 and distance of inflection point from nozzle inlet 0.175 is suitable for design of vertical wind tunnel. Numerical results has been validated by experimental investigation, for experimental investigation a prototype of nozzle has been built and by using a Hot-Wire Anemometer, air flow in nozzle has been considered. Results show that the above considerations reduce the nozzle length by about 60%

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Journal of Solid and Fluid Mechanics
Volume 3, Issue 3 - Serial Number 3
September and October 2013
Pages 137-147

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