Abstract
Three stereoscopic PIV experiments have been examined to test the effectiveness of self-calibration under varied circumstances. Measurements taken in a streamwise plane yielded a robust self-calibration that returned common results regardless of the specific calibration procedure, but measurements in the crossplane exhibited substantial velocity bias errors whose nature was sensitive to the particulars of the self-calibration approach. Self-calibration is complicated by thick laser sheets and large stereoscopic camera angles and further exacerbated by small particle image diameters and high particle seeding density. Despite the different answers obtained by varied self-calibrations, each implementation locked onto an apparently valid solution with small residual disparity and converged adjustment of the calibration plane. Therefore, the convergence of self-calibration on a solution with small disparity is not sufficient to indicate negligible velocity error due to the stereo calibration.
Similar content being viewed by others
References
Beresh SJ, Smith BL (2014) Effects of spatial realignment in stereo PIV calibration. AIAA Paper 2014-1101
Beresh SJ, Henfling JF, Erven RJ, Spillers RW (2006) Crossplane velocimetry of a transverse supersonic jet in a transonic crossflow. AIAA J 44(12):3051–3061
Beresh SJ, Wagner JL, Henfling JF, Spillers RW, Pruett BOM (2015) Width effects in transonic flow over a rectangular cavity. AIAA J 53(12):3831–3834
Charonko JJ, Vlachos PP (2013) Estimation of uncertainty bounds for individual particle image velocimetry measurements from cross-correlation peak ratio. Meas Sci Technol 24(6):065301
Coudert SJM, Schon J-P (2001) Back-projection algorithm with misalignment corrections for 2D3C stereoscopic PIV. Meas Sci Technol 12(9):1371–1381
Neal DR, Sciacchitano A, Smith BL, Scarano F (2015) Collaborative framework for PIV uncertainty quantification: the experimental database. Meas Sci Technol 26(7):074003
Prasad AK (2000) Stereoscopic particle image velocimetry. Exp Fluids 29(2):103–116
Sciacchitano A, Wieneke B, Scarano F (2013) PIV uncertainty quantification by image matching. Meas Sci Technol 24(4):045302
Soloff SM, Adrian RJ, Liu ZC (1997) Distortion compensation for generalized stereoscopic particle image velocimetry. Meas Sci Technol 8(12):1441–1454
Stanislas M, Okamoto K, Kahler CJ, Westerweel J, Scarano F (2008) Main results of the third international PIV challenge. Exp Fluids 45(1):27–71
Timmins BH, Wilson BW, Smith BL, Vlachos PP (2012) A method for automatic estimation of instantaneous local uncertainty in particle image velocimetry measurements. Exp Fluids 53(4):1133–1147
Van Doorne CWH, Westerweel J, Nieuwstadt FTM (2004) Measurement uncertainty of stereoscopic PIV for flow with large out-of-plane motion. Particle image velocimetry: recent improvements, proceedings of the EUROPIV2 workshop, pp 213–227
Wagner JL, Casper KM, Beresh SJ, Henfling JF, Spillers RW, Pruett BOM (2015a) Mitigation of wind tunnel wall interactions in subsonic cavity flows. Exp Fluids 56(3):59
Wagner JL, Casper KM, Beresh SJ, Pruett BOM, Spillers RW, Henfling JF (2015b) Relationship between acoustic tones and flow structure in transonic rectangular cavity flow. AIAA Paper 2015-2937. doi:10.2514/6.2015-2937
Warner SO, Smith BL (2014) Autocorrelation-based estimate of particle image density for diffraction limited particle images. Meas Sci Technol 25(6):065201
Wieneke B (2005) Stereo-PIV using self-calibration on particle images. Exp Fluids 39(2):267–280
Wieneke B (2008) Volume self-calibration for 3D particle image velocimetry. Exp Fluids 45(4):549–556
Wieneke B (2015) PIV uncertainty quantification from correlation statistics. Meas Sci Technol 26(7):074002
Wieneke B, Taylor S (2006) Fat-Sheet PIV with computation of full 3D-strain tensor using tomographic reconstruction. Paper #1064, 13th international symposium on applications of laser techniques to fluid mechanics, Lisbon, Portugal
Willert C (1997) Stereoscopic digital particle image velocimetry for application in wind tunnel flows. Meas Sci Technol 8(12):1465–1479
Acknowledgments
The authors would like to thank Scott Warner of Utah State University for his assistance in estimating particle size and density. This work is supported by Sandia National Laboratories and the US Department of Energy. Sandia is a multiprogram laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the US Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Beresh, S.J., Wagner, J.L. & Smith, B.L. Self-calibration performance in stereoscopic PIV acquired in a transonic wind tunnel. Exp Fluids 57, 48 (2016). https://doi.org/10.1007/s00348-016-2131-y
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/s00348-016-2131-y