Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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PIV Measurement of Flow Inside of HVAC Blower Unit

자동차 HVAC용 Blower Unit 내부 유동장의 PIV 계측

  • Ji, Ho-Seong (Department of Mechanical Engineering, Pohang University of Science and Technology) ;
  • Kim, Bo-Ram (Department of Environmental Engineering, Pohang University of Science and Technology) ;
  • Lee, Sang-Joon (Department of Mechanical Engineering, Pohang University of Science and Technology)
  • 지호성 (포항공과대학교 기계공학과) ;
  • 김보람 (포항공과대학교 환경대학원) ;
  • 이상준 (포항공과대학교 기계공학과)
  • Published : 2007.09.01
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Abstract

Flow characteristics inside a blower unit of an automotive HVAC module were investigated experimentally using a high-resolution PIV technique. The PIV system consists of a 2-head Nd:YAG laser, a high-resolution CCD camera, optics and a synchronizer. The prototype siroco-fan with forward-curved blades was operated under the same condition of real car. The scroll casing was made transparently for capturing clear flow images. The time-averaged velocity fields were measured in three cross sections. Flow is accelerated with going toward the outer wall of scroll due to centrifugal force and large pressure gradient formed in the region between the fan and the outer casing wall. The presence of the cut-off region and diffusing duct of fan outlet influences largely the flow structure inside the blower unit.

Keywords

References

  1. G. H. Lee, J. Y.G Park and J. H. Baek, 'A Study on the Vehicle Passenger Compartment Interior Flow Simulation for the Air-conditioning Mode,' Spring Conference of Proceedings, KSAE, pp.475-480, 1998
  2. W. H. Jeon and D. J. Lee, 'A Numerical Study of the Effects of Design Parameter upon Fan Performance and Noise,' Journal of Korea Fluid Machinery, Vol.2, No.3, pp.45-51, 1999
  3. K. H. Kim, K. C. Park and S. B. Lee, 'Measurement and Prediction of Aerodynamic Noise from Siroco Fans,' Journal of Korea Fluid Machinery, Vol.2, No.4, pp.57-64, 1999
  4. W. H. Jeon, S. J. Baek and C. J. Kim, 'A Numerical Study on the Generation of Aeroacoustic Sound from Siroco Fans,' Journal of Korean Society for Noise and Vibration Engineering, Vol.12, pp.42-47, 2002 https://doi.org/10.5050/KSNVN.2002.12.1.042
  5. K. J. Park, S. H. Lee and B. J. Son, 'A Study on Low-noise and High Efficiency Siroco Fan Development,' Journal of Korea Fluid Machinery, Vol.2, No.2, pp.46-56, 1999
  6. E. Y. Kwon and N. H. Cho, 'Experimental Study on the Mean Flow Characteristics of Forward Curved Centrifugal Fans,' KSME International Journal, Vol.15, No.12, pp.1728-1738, 2001
  7. Y. D. Choi, J. Kurokawa and J. Matsui, 'Performance and Internal Flow Characteristics of a Very Low Specific Speed Centrifugal Pump,' Journal of Fluid Machinery, Vol.128, pp.341-349, 2006
  8. A. J. Pesarini, R. Bigot,V. J. Nadal Mora, C. A. D. Bernardi and P. J. Ringegni, 'Theoretical Analysis Related to Aspects of the Pitot Probe Methodology in Flow Rate Determination for Blowers Performance Tests,' Flow Meas. and Instrumentation, Vol.12, pp.373-377, 2002 https://doi.org/10.1016/S0955-5986(02)00004-3
  9. S. J. Lee, 'PIV/PTV Velocity Field Measurement Techniques-theory and Practice,' PIV05 Lecture Note, POSTECH, 2005