[ Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 30, No. 5, pp.359-365

ISSN: 2508-5107 (Online)

Print publication date 15 Oct 2021

Received 30 Jul 2021 Revised 31 Aug 2021 Accepted 04 Sep 2021

DOI: https://doi.org/10.7735/ksmte.2021.30.5.359

150 LPM 가상임팩터의 최적화 연구

권오찬^a ; 전원영^b ; 이현우^a ; 서영진^a^{, *}

Optimization of 150 LPM Virtual Impactor

Ochan Kwon^a ; Wonyoung Jeon^b ; Hyunwoo Lee^a ; Youngjin Seo^a^{, *}

aDepartment of Mechanical Engineering, Kumoh National Institute of Technology
bDepartment of Mechanical Engineering, Ulsan National Institute of Science and Technology

Correspondence to: ^*Tel.: +82-54-478-7302 E-mail address: yjseo@kumoh.ac.kr (Youngjin Seo).

Abstract

Numerical studies were performed to design a linear slot virtual impactor with a cut-off size of 1 μm, operating at 150 LPM. A prototype model was designed with a general shape of a virtual impactor, numerical analysis was conducted, and the results were compared to a model with different design parameters. ANSYS FLUENT was used for numerical analysis, and an RSM model was used to calculate turbulence in the flow field. The particle trajectory was confirmed using DPM, and the collection efficiency and wall loss of particles inside the virtual impactor were calculated. The optimization was conducted by changing the angle and width of the acceleration nozzle. The CFD results show that reducing the angle of acceleration nozzle results in an increased cut-off size and decreased wall loss of large particles (> 4 μm).

Keywords:

Virtual impactor, CFD (computational fluid dynamics), Collection efficiency, Cut-off size, Particle concentration

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Ochan Kwon

M.S. degree in the Department of Mechanical Engineering, Kumoh National Institute of Technology. His research interest is numerical simulation.

E-mail: 5chan@kumoh.ac.kr

Wonyoung Jeon

Ph.D. Student in the Department of Mechanical Engineering, Ulsan National Institute of Science and Technology. His research interest is aerosol sampling.

E-mail: jwy0717@gmail.com

Hyunwoo Lee

Ph.D. Student in the Department of Mechanical Engineering, Kumoh National Institute of Technology. His research interest is aerosol & fluid mechanics.

E-mail: eddi1993@kumoh.ac.kr

Youngjin Seo

Ph.D. Associate Professor, Kumoh National Institute of Technology. His research interest includes aerosol dynamics and thermal-fluid mechanics.

E-mail: yjseo@kumoh.ac.kr