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http://dx.doi.org/10.9766/KIMST.2019.22.6.763

Optimal Design of Sheath Flow Nozzle Acceleration Section for Improving the Focusing Efficiency  

Lee, Jin-Woo (Graduate School of Mechanical Engineering, Sungkyunkwan University)
Jin, Joung-Min (Graduate School of Mechanical Engineering, Sungkyunkwan University)
Kim, Youn-Jea (School of Mechanical Engineering, Sungkyunkwan University)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.22, no.6, 2019 , pp. 763-772 More about this Journal
Abstract
There is a need to use sheath flow nozzle to detect bioaerosol such as virus and bacteria due to their characteristics. In order to enhance the detection performance depending on nozzle parameters, numerical analysis was carried out using a commercial code, ANSYS CFX. Eulerian-lagrangian approach method is used in this simulation. Multiphase flow characteristics between primary fluid and solid were considered. The detection performance was evaluated based on the results of flow field in nozzle chamber such as focusing efficiency and swirl strength. In addition, Latin hypercube sampling(LHS) of design of experiment(DOE) was used for generating a near-random sampling. Then, the acceleration section is optimized using response surface method(RSM). Results show that the optimized model achieved a 6.13 % in a focusing efficiency and 11.47 % increase in swirl strength over the reference model.
Keywords
Sheath Flow Nozzle; Foucusing Efficiency; Latin Hypercube Sampling; Design of Experiments; Response Surface Method;
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