SCIENTIFIC AND TECHNICAL AEROSPACE REPORTS
A Biweekly Publication of the National Aeronautics and Space Administration
VOLUME 44, ISSUE 1 - January 13, 2006
02 AERODYNAMICS
Includes aerodynamics of flight vehicles, test bodies, airframe components and combinations, wings, and control surfaces.
Also includes aerodynamics of rotors, stators, fans, and other elements of turbomachinery.
For related information see also 34 Fluid Mechanics and Thermodynamics.
20060001918 George Washington Univ., Washington, DC USA
Large-Eddy Simulation of the Tip-Flow of a Rotor in Hover
Mittal, Rajat; Oct. 28, 2005; 11 pp.; In English Contract(s)/Grant(s): DAAD19-01-1-0704 Report No.(s): AD-A440555; ARO-42877-EG.2; No Copyright; Avail.: Defense Technical Information Center (DTIC)
The blade-tip vortex is one of the most important aerodynamic feature of a helicopter rotor wake, The strength, size, location and orientation of the tip vortices affect the blade loads and rotor performance. The overall goal of the current project was to develop a large-eddy simulation (LES) capability to simulate the rotor-tip vortex and use these simulations to perform a detailed analysis of the dynamics of this flow, The specific objectives of this research project are (1) Develop a LES based computational approach for simulating the tip flow of a rotor in hover. (2) Validate the computational approach against PIV measurements of a hovering rotor (3) Use the solver to gain insight into the formation, structure and downstream evolution of the tip-vortex and the dynamics of the turbulence associated with the tip vortex. DTIC
Aerodynamics; Hovering; Large Eddy Simulation; Rotors
20060002337 Nanjing Univ. of Aeronautics and Astronautics, Nanjing, China
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Journal of Nanjing University of Aeronautics & Astronautics, Volume 37, Number 5, October 2005
Dewang, L.; Oct. 2005; 146 pp.; In Chinese Report No.(s): PB2006-100639; Copyright; Avail.: National Technical Information Service (NTIS)
Contents include the following: Anisotropic GMR Effect in Si/Co/Cu/Co Multilayers and Its Correlation with Microstructure Fabrication and Performance of BN/Nylon1010 Composite Substrate; Effect of Strength and Deformation of Die Steel Deposited Metal on Thermal Fatigue Resistance; Stopping Power of Heavy Ions in Human Body Tissue; Mullite Ceramic Composites Fabricated by Chemical Vapor Infiltration; Structural and Electromagnetic Properties of Double Perovskite (Sr(sub 2-x)Ba(sub x)FeMoO(sub 6)); Formation of Shear Band in Cold Rolled Boby-Centered Cubic Metal; Photocatalytic Degradation of Methyl Orange on Anodic Oxidation TiO2 Films; Double Glow Plasma Surface Molybdenizing of Pure Ti and Ti-6Al-4V; Research on Recycled Plastic Wood Composites; Preparation of Three-Dimensionally Ordered Macroporous Carbon with High Specific Surface Area Using SiO2 Opal as Template; Fabrication of Nano-Porous TiO2 Films on Pure Titanium and Its Alloy; Fabrication Process of Nano-CeO2 Particulates/Galfan Composites; Synthesis and Characterization of Block Copolymer; Poly (methyl methacrylate)-b-Polystyrene; Hydrothermal Preparation and Characterization of Hydroxyapatite Whiskers; Safety Analysis of HP40 Austenitic Heat-Resistant Steel Tubes After Long Time Aged; Friction andWear Properties of PTFE Composites Reinforced with Nano Particle Kaolin; Adaptive Segmentation Method of Metal Image; Synthesis of Nanoporous Silicon Nitride-Based Materials with Various Novel Morphologies in Nonaqueous Media; Synthesis and Characterization of P(VDF-TrFE) with Partially Grafted Copper Phthalocyanine Oligomer; Effect of Scanning Path on Temperature Field in Direct Metal Laser Sintering Process; Synthesis and Study of New Intercalation Compound of FeOCI(8-hydroxy-Quinoline)(sub 0.78); Effects of Cation-Exchange Resins onWater Dissociation in Electric Field; Mechanical Properties of SiC(sup p)/ZA27 Composites Prepared by High Intensity Ultrasound Treatment; Theoretical Study on Elastic Properties of 2.5D Braided Composites; Structures of Beta-Nickel Hydroxide and Electrocatalytical Properties of Complex Electrode; and Effects of Silica Sol on Properties of Ca-Bentonite. NTIS
Anisotropy; Silicon; Cobalt; Copper; Laminates
Source: NASA.
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