Volume 13, Issue 1 (2013)                   Modares Mechanical Engineering 2013, 13(1): 49-60 | Back to browse issues page

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Kazemi Esfeh M. Experimental Investigation of Upstream Structures Influence on the Ventilation Performance of One-Sided Wind-Catchers. Modares Mechanical Engineering. 2013; 13 (1) :49-60
URL: http://mme.modares.ac.ir/article-15-10681-en.html
Abstract:   (4207 Views)
In the present study, the ventilation performance of a one-sided wind-catcher positioned in the wake of an upstream structure is experimentally investigated by measuring the induced airflow rates and employing smoke flow visualization techniques. Wind-catchers are usually used in places of high urban densities in Middle East regions; however, their potential to provide natural ventilation depends on the presence of upstream structures. The present study focuses on the ventilation performance evaluation of a one-sided wind-catcher located in the wake of an upstream structure model. The influence of the upstream structure height and its distance relative to the wind-catcher on the flow structure within and around the wind-catcher is investigated. Moreover, the ventilation performance is evaluated by measuring the ventilation flow rate using a hot wire anemometer for upstream air velocities of 10 and 15 m/s. The results show that the presence of an upstream object influences the rate and the direction of air flowing from the wind-catcher to the house. Placing a short upstream object increases the induced air flow rate. However, by increasing the height of upstream object, the airflow direction is reversed inside the wind-catcher and the air may flow backward from the ventilated space to the wind-catcher.
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Article Type: Research Article | Subject: Plumbing & Air Conditioning|Experimental Fluid Mechanics & Heat Transfer
Received: 2012/08/6 | Accepted: 2012/10/10 | Published: 2013/01/19

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