Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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Optimal Design of Sheath Flow Nozzle Acceleration Section for Improving the Focusing Efficiency

집속효율 향상을 위한 외장유동노즐 가속 구간의 최적설계 연구

  • 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)
  • 이진우 (성균관대학교 일반대학원 기계공학과) ;
  • 진정민 (성균관대학교 일반대학원 기계공학과) ;
  • 김윤제 (성균관대학교 기계공학부)
  • Received : 2019.07.05
  • Accepted : 2019.10.11
  • Published : 2019.12.05
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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.

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References

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