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Design And Evaluation Of A New Boundary Layer Rake For Flight Testing

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Design And Evaluation Of A New Boundary Layer Rake For Flight Testing

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Author : Trong T. Bui
language : en
Publisher:
Release Date : 2000

Design And Evaluation Of A New Boundary Layer Rake For Flight Testing written by Trong T. Bui and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Boundary layer categories.

A new boundary-layer rake has been designed and built for flight testing on the NASA Dryden Flight Research Center F-15B/Flight Test Fixture. A feature unique to this rake is its curved body, which allows pitot tubes to be more densely clustered in the near-wall region than conventional rakes allow. This curved rake design has a complex three-dimensional shape that requires innovative solid-modeling and machining techniques. Finite-element stress analysis of the new design shows high factors of safety. The rake has passed a ground test in which random vibration measuring 12 g rms was applied for 20 min in each of the three normal directions. Aerodynamic evaluation of the rake has been conducted in the NASA Glenn Research Center 8x6 Supersonic Wind Tunnel at Mach 0-2. The pitiot pressures from the new rake agree with conventional rake data over the range of Mach numbers tested. The boundary-layer profiles computed from the rake data have been shown to have the standard logarithmic-law profile. Skin friction values computed from the rake data using the Clauser plot method agree with the Preston tube results and the van Driest II compressible skin friction correlation to approximately plus/minus 5 percent.

Design And Evaluation Of A New Boundary Layer Rake For Flight Testing

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Author : Trong T. Bui
language : en
Publisher:
Release Date : 2000

In Flight Capability For Evaluating Skin Friction Gages And Other Near Wall Flow Sensors

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Author : Trong T. Bui
language : en
Publisher:
Release Date : 2003

In Flight Capability For Evaluating Skin Friction Gages And Other Near Wall Flow Sensors written by Trong T. Bui and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Boundary layer categories.

The Aerodynamics Of Heavy Vehicles Trucks Buses And Trains

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Author : Rose McCallen
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-07-30

The Aerodynamics Of Heavy Vehicles Trucks Buses And Trains written by Rose McCallen and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-07-30 with Technology & Engineering categories.

It is our pleasure to present these proceedings from the United Engineering Foundation Conference on The Aerodynamics of Heavy Vehicles: Trucks, Buses and Trains held December 2-6, 2002, in Monterey, California. This Department of Energy, United Engineering Foundation, and industry sponsored conference brought together 90 leading engineering researchers from around the world to discuss the aerodynamic drag of heavy vehicles. Participants from national labs, academia, and industry, including truck manufacturers, discussed how computer simulation and experimental techniques could be used to design more fuel efficient trucks, buses, and trains. Conference topics included comparison of computational fluid dynamics calculations using both steady and unsteady Reynolds-averaged Navier-Stokes, large-eddy simulation, and hybrid turbulence models and experimental data obtained from the Department of Energy sponsored and other wind tunnel experiments. Advanced experimental techniques including three-dimensional particle image velocimetry were presented, along with their use in evaluating drag reduction devices. We would like to thank the UEF conference organizers for their dedication and quick response to sudden deadlines. In addition, we would like to thank all session chairs, the scientific advisory committee, authors, and reviewers for their many hours of dedicated effort that contributed to a successful conference and resulted in this document of the conference proceedings. We also gratefully acknowledge the support received from the United Engineering Foundation, the US Department of Energy, Lawrence Livermore National Laboratory, Volvo Trucks America, International Truck and Engine Corporation, and Freightliner LLC.