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  • Don't Fear the Turbo (Blower) - Part 2
    At the heart of a high speed turbo is a very specialized set of bearings that support the impeller assembly as it rotates at 20,000-40,000 RPM. The two most popular styles are magnetic and airfoil. What are the differences? Which one is better?
  • Saving Energy with Smart Air
    Significant gains in energy efficiency have been elusive for heat transfer systems that use high-volume air-movement systems such as cooling towers, chillers and evaporative coolers. Although much attention has been given to improving fan and blade airfoil designs used in high-volume air-movement
  • Pin Fin Array Endwall Heat Transfer Measurements Using Infrared Thermography (.pdf)
    area. The work presented was focused on, but not limited to, gas turbine airfoil internal heat transfer. In this study, heat transfer from a single row of circular pin fins oriented perpendicular to the flow was investigated. The configurations studied had span wise spacing to pin diameter ratios
  • Simulating ice
    is currently upgrading and modifying a Navy S-3 Viking into an icing research platform or IRA (icing-research aircraft). Ice (in white) formed on the leading edge of an airfoil changes the Machnumber contours. The ice shape was obtained by tracing a real ice shape generated in the Icing Research Tunnel
  • Advanced Airfoils For The Changing Fan Market (.pdf)
    , or airfoil, that governs the airflow around the fan blade. In an effort to achieve better energy efficiency, the National Renewable Energy Laboratory (NREL) has developed new and unique blade root and tip airfoils that transition linearly from root to tip and have progressively changing compatible
  • Thermal Residual Stress Relaxation And Distortion In Surface Enhanced Gas Turbine Engine Components (.pdf)
    be lost in less than 10 minutes even at moderate engine temperatures. Finite element estimates of the distortion resulting from nonuniform thermal relaxation in a hypothetical airfoil geometry is presented.
  • Improved Damage Tolerance in Titanium Alloy Fan Blades with Low Plasticity Burnishing (.pdf)
    Low Plasticity Burnishing (LPB) has been applied to. produce a layer of deep high magnitude compressive. residual stress in the leading edge of Ti-6Al-4V first stage. fan blades. The goal was to improve damage tolerance from. 0.13 to 0.5 mm (0.005 to 0.02 in.). LPB processing of the. airfoil
  • Scanning for Ideas: Unmanned Trimaran Smart Enough to Trim Its own Sails
    will measure 50 ft long, have a 40-ft beam, and a 60-ft mast. Draft is 10 ft with the hydrofoils lowered. Its airfoil will have 700 ft of surface area. It will carry up to 1,500 lb of payload in 600 ft of storage space. Top speed is at least 25 knots and range is 500 miles. It will be able to spend

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