Download or read book Three dimensional Transonic Rotor Flow Field Reconstructed from Holographic Interferogram Data written by J. K. Kittleson and published by . This book was released on 1985 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Holographic interferometry and computer-assisted tomography (CAT) are used to determine the transonic flow field of a model rotor blade in hover. A pulsed ruby laser recorded 40 interferograms with a 61 cm-diam view field near the model rotor-blade tip operating at a tipo Mach number of 0.90. After digitizing the interferograms and extracting fringe-order functions, the data are transferred to a CAT code. The CAT code then calculates pressure coefficients in several planes above the blade surface. The values from the holography-CAT method compare favorably with previously obtained numerical computations and laser velocimeter measurements at most locations near the blade tip. The results demonstrate the techniques's potential for three-dimensional transonic rotor flow studies. Keywords: Holographic interferometry; Computer assisted tomography; Helicopter aerodynamics; Transonic aerodynamics.

Download or read book Reconstruction of a 3 Dimensional Transonic Rotor Flow Field from Holographic Interferogram Data written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-06 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Holographic interferometry and computer-assisted tomography (CAT) are used to determine the transonic velocity field of a model rotor blade in hover. A pulsed ruby laser recorded 40 interferograms with a 2-ft-diam view field near the model rotor-blade tip operating at a tip Mach number of 0.90. After digitizing the interferograms and extracting fringe-order functions, the data are transferred to a CAT code. The CAT code then calculates the perturbation velocity in seeral planes above the blade surface. The values from the holography-CAT method compare favorably with previously obtained numerical computations in most locations near the blade tip. The results demonstrate the technique's potential for three-dimensional transonic rotor flow studies. Yu, Y. H. and Kittleson, J. K. and Becker, F. Ames Research Center NASA-TM-86690, REPT-85147, NAS 1.15:88690, USAAVSCOM-TR-85-A-1, AD-A152617

Download or read book Reconstruction of a 3 dimensional Transonic Rotor Flow Field from Holographic Interferogram Data written by and published by . This book was released on 1985 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Fringe Localization Requirements for Three dimensional Flow Visualization of Shock Waves in Diffuse illumination Double Pulse Holographic Interferometry written by Arthur J. Decker and published by . This book was released on 1982 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book FRINGE 93 written by Werner Jüptner and published by Wiley-VCH. This book was released on 1993-10-28 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: For testing of materials there exists a variety of very modern optical metrological methods, especially laser methods. The automatic processing - optical or digital image processing - of fringe patterns that are always emerging in this connection is the central point of the proceedings of Fringe '93.

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