Mission studies have shown strong potential to reduce in-theater casualties by using high-speed rotorcraft capable of both vertical takeoff and landing (VTOL) and high-speed, high-altitude, long-range cruising. The rotational speed of the prop-rotors on this type of vehicle must be slowed during forward flight to maintain high propulsive efficiency. One approach to meeting this requirement is to use a variable-speed power turbine (VSPT) to drive the prop-rotor. However, power turbines ...
Experimental heat transfer and pressure measurements were obtained on a large scale film cooled turbine vane cascade. The objective was to investigate heat transfer on a commercial high pressure first stage turbine vane at near engine Mach and Reynolds number conditions. Additionally blowing ratios and coolant density were also matched. Numerical computations were made with the Glenn-HT code of the same geometry and compared with the experimental results. We used ...
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