Adaptation of Genetic Algorithm to Determine Air Jet Shape of Flow Visualized by Helium Bubbles
Publication: Journal of Aerospace Engineering
Volume 29, Issue 6
Abstract
During the development of ventilation and air conditioning systems, it is important to verify the functionality of the devised system, especially the method by which air fills the space. In this case, an optical visualization method of introducing helium bubbles into the airflow can be used for this function. A special generator produces small bubbles filled with helium. These bubbles are visible particles of airflow, making it possible to determine the shape of such a flow. This article describes the evaluation of flow images visualized by helium bubbles. Bubbles are detected by comparing intensities and subsequently cleaning faulty bubbles. For a convex airflow shape, exact geometric methods are used, and for a more precisely nonconvex shape of airflow, a genetic algorithm is used, in which a sophisticated algorithm of arranging a boundary line from selected points is applied. The algorithm also includes a specific approach of representing individuals in population inclusive of determining their fitness values.
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Published In
Journal of Aerospace Engineering
Volume 29 • Issue 6 • November 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Nov 5, 2015
Accepted: Apr 8, 2016
Published online: Jul 13, 2016
Published in print: Nov 1, 2016
Discussion open until: Dec 13, 2016
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