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RISComparison of Endwall Loss Reduction Techniques in a High-Lift Turbine Passage
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The development of techniques that reduce the losses in the endwall region is an important area of research as it supports an increase in the turbine design space through the use of higher lift blade designs while maintaining ...
Vortex Unsteadiness in the Endwall Region of a High-Lift Low-Pressure Turbine Passage
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Three-dimensional vortical structures within the endwall region of turbine passages directly affect the aerodynamic efficiency and heat transfer characteristics of the turbine. Interactions between the vortical endwall ...
Parametric Optimization of Unsteady End Wall Blowing on a Highly Loaded Low Pressure Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Efforts to reduce blade count and avoid boundary layer separation have led to lowpressure turbine airfoils with significant increases in loading as well as frontloaded pressure distributions. These features have been ...
Experimental Comparison of DBD Plasma Actuators for Low Reynolds Number Separation Control
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents experimental work comparing several Dielectric Barrier Discharge (DBD) plasma actuator configurations for low Reynolds number separation control. Actuators studied here are being investigated for use ...
Endwall Loss and Mixing Analysis of a High Lift Low Pressure Turbine Cascade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A high lift low pressure turbine (LPT) profile designated L2A is used as a test bed for studying the origin of endwall mixing loss and the role of vortical structures in loss development. It is shown analytically and ...
Effect of Blade Profile Contouring on Endwall Flow Structure in a High-Lift Low-Pressure Turbine Cascade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Previous work has shown that low-stagger contouring near the endwall of a nominally high-lift and high-stagger angle front-loaded low-pressure turbine (LPT) airfoil is successful in reducing endwall loss by limiting the ...
Secondary Flow Loss Reduction Through Blowing for a High Lift Front Loaded Low Pressure Turbine Cascade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Efforts to increase individual blade loading in the low pressure turbine have resulted in blade geometries optimized for midspan performance. Many researchers have shown that increased blade loading and a frontloaded ...
End Wall Loss Reduction of High Lift Low Pressure Turbine Airfoils Using Profile Contouring—Part II: Validation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The hypothesis, posed in Part I, that excessive end wall loss of high lift low pressure turbine (LPT) airfoils is due to the influence of high stagger angles on the end wall pressure distribution and not front loading is ...
Film Cooling on the Geometrically Modified Trailing Edge Model of Gas Turbine Blade
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: The objective of this study is to examine the effect of the geometrical modification of the land on the overall film cooling effectiveness on the cutback region of a turbine blade model. A room-temperature experiment was ...
Endwall Loss Reduction of High Lift Low Pressure Turbine Airfoils Using Profile Contouring—Part I: Airfoil Design
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents the reasoning for and the design process of contouring a high lift frontloaded low pressure turbine (LPT) airfoil near the endwall to reduce the endwall loss. The test airfoil, L2F, was designed to the ...