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RISImpact of Severe Temperature Distortion on Turbine Efficiency
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents an experimental and computational study of the effect of severe inlet temperature distortion (hot streaks) on the efficiency of the MT1 HP turbine, which is a highlyloaded unshrouded transonic design. ...
Understanding Thermal Unsteadiness in Engine Representative Flows and Improved Methodologies for Derived Heat Transfer Calculations Using Thin-Film Gauges
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The Oxford Turbine Research Facility (OTRF) is a high-speed rotating transient test facility, which allows unsteady aerodynamic and heat transfer measurements at engine representative conditions. In addition, a variety of ...
Effect of Combustor Swirl on Transonic High Pressure Turbine Efficiency
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents an experimental and computational study of the effect of inlet swirl on the efficiency of a transonic turbine stage. The efficiency penalty is approximately 1%, but it is argued that this could be ...
Unsteady Flow Phenomena in Turbine Rim Seals
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: While turbine rim sealing flows are an important aspect of turbomachinery design, affecting turbine aerodynamic performance and turbine disk temperatures, the present understanding and predictive capability for such flows ...
Investigation of a HighPressure Turbine Stage in a HighSpeed Rotating Transient Test Facility for Rotor Tip Study and a Parametric Study for Improved Heat Transfer Calculation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The first part of the paper presents commissioning of a singlestage highpressure (HP) turbine employed in a series of extensive experiments to study the aerodynamics and heat transfer on the rotor surface and casing liner. ...
Performance of a Turbine Rim Seal Subject to Rotationally-Driven and Pressure-Driven Ingestion
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This experimental study considered the performance of a chute rim seal downstream of turbine nozzle guide vanes (but without rotor blades). The experimental setup reproduced rotationally-driven ingestion without vanes and ...
Measurement of Inertial and Acoustic Waves in a Turbine Chute Rim Seal Cavity
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A chute rim seal cavity has been instrumented with time-resolved and time-averaged pressure transducers as well as a gas concentration measurement system at the Oxford Rotor Facility. The unsteady pressure transducers were ...
Wall-Modeled Large Eddy Simulations of Axial Turbine Rim Sealing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents wall-modeled large-eddy simulations (WMLES) of a chute-type turbine rim seal. Configurations with an axisymmetric annulus flow and with nozzle guide vanes fitted (but without rotor blades) are considered. ...
Impact of Rotor-Casing Effusion Cooling on Turbine Performance and Operating Point: An Experimental, Computational, and Theoretical Study
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: It is known that a secondary effect of rotor-casing effusion cooling is to modify and potentially spoil the rotor over-tip leakage flow. Studies have shown both positive and negative impacts on high-pressure (HP) stage ...
Effect of a Combined Hot-Streak and Swirl Profile on Cooled 1.5-Stage Turbine Aerodynamics: An Experimental and Computational Study
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Recently developed lean-burn combustors offer reduced NOx emissions for gas turbines. The flow at exit of lean-burn combustors is dominated by hot streaks and residual swirl, which have been shown—individually—to impact ...