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1.5μm\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$1.5\,\upmu \mathrm{{m}}$$\end{document} LIDAR for Helicopter Blade Tip Vortex Detection

Advanced In-Flight Measurement Techniques, p.187-194

Springer-Verlag Berlin Heidelberg 2013 ;ISSN: 2194-8240 ;ISBN: 9783642347375 ;ISBN: 3642347371 ;EISSN: 2194-8259 ;EISBN: 9783642347382 ;EISBN: 364234738X ;DOI: 10.1007/978-3-642-34738-2_12

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  • Title:
    1.5μm\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$1.5\,\upmu \mathrm{{m}}$$\end{document} LIDAR for Helicopter Blade Tip Vortex Detection
  • Author: Augere, Béatrice ; Besson, Claudine ; Dolfi, Agnès ; Fleury, Didier ; Goular, Didier ; Valla, Matthieu
  • Subjects: Backscatter Coefficient ; Lidar Measurement ; Scanning Mirror ; Vortex Model ; Vortex Velocity
  • Is Part Of: Advanced In-Flight Measurement Techniques, p.187-194
  • Description: The objective of the ONERA study in the AIM project “Advanced In-flight Measurement Techniques” is to assess the capability of on board LIDAR technique to investigate in-flight tip vortices behaviour. This paper presents the design of as 1.5μm\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document} .5\,\upmu \mathrm{{m}} end{document} LIDAR sensor dedicated to tip vortex characterization and tests on ground during trials on a DLR helicopter in hover flight. The relevant information resulting from these trials is the tip vortex velocity field as well as the time evolution of the vortex. The technical challenge here is to characterize a very small phenomenon at short range: the core radius varies from typically 10 to 30 mm as the vortex ages. The study results show that LIDAR technique is promising for onboard measurement during flight. The velocity measurement is direct and absolute (no calibration needed) and its accuracy can be up to 0.25 m/s and commonly 1 m/s. However, seeding is necessary to realize a compact and reliable LIDAR system with components ‘off the shelf’: in the framework of flight trials, clouds could provide efficient seeding enabling the use of LIDAR as a powerful technique for tip vortex characterization.
  • Publisher: Berlin, Heidelberg: Springer Berlin Heidelberg
  • Language: English
  • Identifier: ISSN: 2194-8240
    ISBN: 9783642347375
    ISBN: 3642347371
    EISSN: 2194-8259
    EISBN: 9783642347382
    EISBN: 364234738X
    DOI: 10.1007/978-3-642-34738-2_12
  • Source: Alma/SFX Local Collection
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