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Title Analytical and Numerical Validation of Nozzle Spray Measurement Data Obtained from a Newly Developed Production System
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Degree MSin Mechanical Engineering
Discipline/Department Washkewicz College of Engineering
Degree Level masters
University/Publisher Cleveland State University
Abstract A newly developed production test stand for measuring the spray angle of a pressure swirl atomizer was constructed and used to measure a product line of these pressure swirl atomizers – the macrospray atomizer. This new test stand, utilizing constant temperature hot wire anemometers, captures the spray angle data based on the voltage drop the hot wire probes see as they traverse the spray cone of the atomizer and as fluid droplets impinge upon the wire. Datasets acquired from the experiments are compared and correlated with computational fluid dynamics (CFD) simulation data. In addition, angles obtained from another type of spray characterization technique, the spray angle device, are also compared to see how closely CFD can predict the angle as captured by this new stand and how reliable and independent of human error it is. Another nozzle with a pressure swirl atomizer, the conventional atomizer, is also simulated to compare its agreement with experimental values obtained from the spray angle device. Finally, the datasets are compared to understand if the CFD results, when compared to the two spray characterization techniques used in this thesis for both the nozzle and atomizer can be utilized to assist in future atomizer designs. For the macrospray atomizer, it was found through the experiments that the hot wire stand predicts the spray angle more accurately within 10% error. The spray angle device measured the spray angles within an error of 29% while the CFD introduced more error into the spray angle measurement obtained, within 7% to 93%. The conventional atomizer was found to have an error up to 18% with CFD results and up to 28% with the manual spray angle device.
Subjects/Keywords Mechanical Engineering; Fluid Dynamics; Engineering; atomization; spray; angles; hot wire anemometry; CFD; simulation; computational fluid dynamics; atomizers; atomizer; pressure swirl atomizer; spray cone; spray; nozzle; nozzles; sprays; measurement; spray angle; cone; air core; hot wire anemometers
Contributors Ibrahim, Mounir (Committee Chair)
Language en
Rights unrestricted ; This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
Country of Publication us
Format application/pdf
Record ID oai:etd.ohiolink.edu:csu1446504762
Repository ohiolink
Date Indexed 2016-12-22
Grantor Cleveland State University

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