A Numerical Study of a Vehicle Windshield Defrosting Mechanism

자동차 전면유리 제상 메커니즘의 수치해석 연구

  • Kang, Seung-Jae (Department of Mechanical Engineering, Kongju National University) ;
  • Jun, Yong-Du (Department of Mechanical Engineering, Kongju National University) ;
  • Lee, Kum-Bae (Department of Mechanical Engineering, Kongju National University)
  • 강승재 (공주대학교 기계공학과) ;
  • 전용두 (공주대학교 기계공학과) ;
  • 이금배 (공주대학교 기계공학과)
  • Received : 2010.03.23
  • Accepted : 2010.09.05
  • Published : 2010.09.30

Abstract

Adequate visibility through a vehicle windshield and frost melting period are critical aspects of major design parameters. To make progress in this area, a good understanding of the flow behavior and heat transfer characteristics produced by the HVAC module is required. The computational study was used to perform the parametric investigation into the defroster nozzle's performance with a full-scale model. The study highlights the drawbacks of current designs and points the way to improve passive defrosting mechanism. The results show that the current design of the defroster nozzles deliver the maximum airflow in the vicinity of the lower part of the windshield, which yields unsatisfactory visibility. Defrosting performance was excellent when the injection angle of the defrost nozzle was 45 degree. The numerical analysis satisfies the criteria provided by NHTSA.

Acknowledgement

Supported by : 공주대학교

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