Flow noise prediction test and numerical validation for clothes dryer fan systems considering the effect of heat exchangers

Wonick Choi; Jinho Choi; Cheolung Cheong

doi:10.7776/ASK.2025.44.4.303

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2025 Vol.44, Issue 4 Next Page

Research Article

Flow noise prediction test and numerical validation for clothes dryer fan systems considering the effect of heat exchangers 열교환기 영향을 고려한 의류건조기 팬 시스템의 유동 소음 예측 시험 및 해석 검증

31 July 2025. pp. 303-311

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Abstract

In this paper, an experimental methodology for predicting the airflow and flow-induced noise of a clothes dryer fan system is proposed, with specific consideration of the effects of a heat exchanger. The feasibility of this method is validated through numerical simulations. To achieve this, both a fan-scroll unit system and a module system incorporating a heat exchanger and duct geometry were constructed, and flow noise measurements were conducted under operating conditions identical to the actual product. The experiments were carried out using an anechoic fan performance test apparatus designed in accordance with AMCA 210-16 and IEC 60704-2-6 standards, and results were compared with those of the product to assess agreement. Numerical analysis was performed by integrating Computational Fluid Dynamics (CFD) and Computational Aeroacoustics (CAA), and the accuracy of the prediction was evaluated through comparison with experimental results. As a result, the module system, which includes the heat exchanger, demonstrated high consistency with the product in both flow and acoustic characteristics. The proposed method effectively captured flow-induced noise differences across various fan geometries. Additionally, vortex shedding and turbulent energy concentration observed in the heat exchanger wake contributed significantly to broadband noise, clarifying key flow mechanisms behind broadband noise generation.

Keywords

Clothes dryer

Fan-scroll system

Heat exchanger

Flow-induced noise

Computational Fluid Dynamics (CFD)

본 연구는 열교환기의 영향을 고려하여 의류 건조기 팬 시스템의 유량 및 유동 소음을 예측할 수 있는 실험적 기법을 개발하고, 그 타당성을 수치해석을 통해 이론적으로 검증하는 것을 목적으로 한다. 이를 위해 팬과 스크롤로 구성된 단품 시스템과, 열교환기 및 유로 형상을 포함한 모듈 시스템을 각각 구축하고, 제품과 동일한 운전 조건에서 유동 소음을 측정하였다. 실험은 AMCA 210-16 및 IEC 60704-2-6 표준을 반영하여 설계된 무향 팬 성능시험기를 활용하여 수행하였으며, 실제 제품과의 소음 특성 비교를 통해 시스템 정합도를 확인하였다. 전산 유체 역학(Computational Fluid Dynamics, CFD)과 전산공력음향학(Computational AeroAcoustics, CAA)을 결합한 복합 수치해석 기법을 적용하였으며, 실험 결과와의 비교를 통해 예측 방법의 신뢰성을 검토하였다. 그 결과, 열교환기를 포함한 모듈 시스템은 실제 제품과 유사한 유동 조건과 소음 스펙트럼을 재현하여 높은 정합도를 보였으며, 제안된 시험법은 팬 형상에 따른 유동 소음 특성의 차이를 효과적으로 분석할 수 있음을 입증하였다. 또한 열교환기 후류에서 발생하는 볼텍스 셰딩과 난류 에너지 집중 현상이 광대역 소음에 미치는 영향을 규명함으로써, 광대역 소음 발생의 주요 유동 원인을 이론적으로 규명하였다.

키워드

의류 건조기

팬 스크롤 시스템

열교환기

유동 소음

전산유체역학

References

J. Choi, S. Y. Ryu, C. Cheong, M. K. Kim, and K. Lee, “Blade shape optimization of centrifugal fan for improving performance and reducing aerodynamic noise of clothes dryer” (in Korean), J. Acoust. Soc. Kr. 38, 321-327 (2019).

M. Jung, J. Choi, S. Y. Ryu, C. Cheong, T. H. Kim, and J. Koo, “Improvement in flow and noise performance of backward centrifugal fan by redesigning airfoil geometry” (in Korean), J. Acoust. Soc. Kr. 40, 555-565 (2021).

S. Ryu, C. Cheong, J. Kim, and B. Park, “Improvement in aerodynamic and aeroacoustic performances of axial-flow fan in outdoor unit of air-conditioner using two-dimensional cascade analysis,” Proc. Inter-Noise, 2275-2284 (2020).

W. Neise, “Noise reduction in centrifugal fans : A literature survey,” J. Sound. Vib. 45, 375-403 (1976).

10.1016/0022-460X(76)90394-1

210-16: Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating,” AMCA International Inc., 2016.

60704-2-6, Household and Similar Electrical Appliances – Test Code for the Determination of AirBorne Acoustical Noise – Part 2-6: Particular Requirements for Tumble Dryers, IEC, 2020.

S. Y. Ryu, M. Jung, Y. Song, and C. Cheong, “Numerical comparative study on high-fidelity prediction of aerodynamic noise from centrifugal fan system” (in Korean), J. Acoust. Soc. Kr. 41, 713-722 (2022).

F. Czwielong and S. Becker, “Impact of heat exchangers on axial fan rotor noise in heat pump applications,” Proc. Forum Acusticum, 3885-3892 (2023).

10.61782/fa.2023.0788

Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 44
No :4
Pages :303-311
Received Date : 2025-05-09
Revised Date : 2025-06-13
Accepted Date : 2025-06-25
DOI :https://doi.org/10.7776/ASK.2025.44.4.303

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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