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Effect of Recirculation Ratio on the Uniformity Flow in a High Area Ratio of Outlets Pipe at Different Entrance flow rates

Journal of Engineering

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Title Effect of Recirculation Ratio on the Uniformity Flow in a High Area Ratio of Outlets Pipe at Different Entrance flow rates
 
Creator Alawee, Wissam H.
Hassan, Jafar M.
Mohammad, Wahid S.
 
Description The uniform flow distrbiution in the multi-outlets pipe highly depends on the several parameters act togather. Therefor, there is no general method to achieve this goal. The  goal of this study is to investigate the proposed approach that can provide significant relief of the maldistribution. The method is based on re-circulating portion of flow from the end of the header to reduce pressure at this region . The physical model consists of main manifold with uniform longitudinal section having diameter of 152.4 mm (6 in), five laterals with diameter of 76.2 mm (3 in), and spacing of 300 mm. At first, The experiment is carried out with conventional manifold, which is a closed-end. Then, small amount of water is allowed by controling the valve located at the end of the manifold slowly. The  pressure and the flow distribution among the lateral pipes were recorded. Different inlet flows have been tested and the values of these flows are (625, 790, and 950) l/min. The result reveals that  the conventional header give high non-uniform flow distrbution and the distribution of flow is greatly improved by using the perposed methods . When the recircluting ratio is of 15%, the non-uniform coefficient (the stander devation) is reduced from 0.48 to 0.13 which means improves in the flow distribution by 75%.
 
 
 
Publisher College of Engineering | University of Baghdad
 
Date 2015-09-01
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://joe.uobaghdad.edu.iq/index.php/main/article/view/356
 
Source مجلة الهندسة; مجلد 21 عدد 9 (2015): Journal of Engineering (Eng. J.); 169-184
Journal of Engineering; Vol 21 No 9 (2015): Journal of Engineering (Eng. J.); 169-184
2520-3339
1726-4073
 
Language eng
 
Relation http://joe.uobaghdad.edu.iq/index.php/main/article/view/356/309
 
Rights Copyright (c) 2015 Eng. J.