Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Development of Stereoscopic PIV Measurement Technique and Its Application to Wake behind an Axial Fan

Stereoscopic PIV 기법의 개발과 이를 이용한 축류 홴 후류의 유동해석

  • Yun, Jeong-Hwan (Dept. of Mechanical Engineering, Graduate School of Pohang University of Science and Technology) ;
  • Lee, Sang-Jun (Dept. of Mechanical Engineering, Graduate School of Pohang University of Science and Technology)
  • 윤정환 (포항공과대학교 대학원 기계공학과) ;
  • 이상준 (포항공과대학교 대학원 기계공학과)
  • Published : 2002.02.01
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Abstract

A stereoscopic PIV (SPIV) measurement system based on the translation configuration was developed and applied to the flow behind a forward-swept axial-fan. Measurement of three orthogonal velocity components is essential for flow analysis of three-dimensional flows such as flow around a fan or propeller. In this study, the translation configuration was adopted to calculate the out-of-plane velocity component from 2-D PIV data obtained from two CCD cameras. The error caused by the out-of-plane motion was estimated by direct comparison of the 2-D PIV and 3-D SPIV results that measured from the particle images captured simultaneously. The comparison shows that the error ratio is relatively high in the region of higher out-of-plane motion near the axial fan blade. The turbulence intensity measured by the 2-D PIV method is bigger by about 5.8% in maximum compared with that of the 3-D SPIV method. The phase-averaged velocity field results show that the wake behind an axial fan has a periodic flow structure with respect to the blade phase and the characteristic flow structure is shifted downstream in the next phase.

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References

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