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RISEffect of Unsteady Wakes on Boundary Layer Separation on a Very High Lift Low Pressure Turbine Airfoil
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Boundary layer separation has been studied on a very high lift, low pressure turbine airfoil in the presence of unsteady wakes. Experiments were done under low (0.6%) and high (4%) freestream ...
Passive Flow Control on Low-Pressure Turbine Airfoils
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Two-dimensional rectangular bars have been used in an experimental study to control boundary layer transition and reattachment under low-pressure turbine conditions. Cases with Reynolds numbers ...
Separated Flow Measurements on a Highly Loaded Low-Pressure Turbine Airfoil
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Boundary layer separation, transition, and reattachment have been studied on a new, very high lift, low-pressure turbine airfoil. Experiments were done under low freestream turbulence conditions ...
Separated Flow Transition Under Simulated Low-Pressure Turbine Airfoil Conditions—Part 2: Turbulence Spectra
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Spectral analysis was used to investigate boundary layer separation, transition and reattachment under low-pressure turbine airfoil conditions. Cases with Reynolds numbers ranging from 25,000 to ...
Separated Flow Transition Under Simulated Low-Pressure Turbine Airfoil Conditions—Part 1: Mean Flow and Turbulence Statistics
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Boundary layer separation, transition and reattachment have been studied experimentally under low-pressure turbine airfoil conditions. Cases with Reynolds numbers (Re) ranging from 25,000 to 300,000 ...
Separation Control on Low-Pressure Turbine Airfoils Using Synthetic Vortex Generator Jets
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Oscillating vortex generator jets have been used to control boundary layer separation from the suction side of a low-pressure turbine airfoil. A low Reynolds number (Re=25,000) case with low ...
Experiments With Three-Dimensional Passive Flow Control Devices on Low-Pressure Turbine Airfoils
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The effectiveness of three-dimensional passive devices for flow control on low pressure turbine airfoils was investigated experimentally. A row of small cylinders was placed at the pressure minimum ...
Spectral Measurements in Transitional Boundary Layers on a Concave Wall Under High and Low Free-Stream Turbulence Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The relationship between free-stream turbulence and boundary layer behavior has been investigated using spectral measurements. The power spectral densities of turbulence quantities in transitional ...
Measurements in Separated and Transitional Boundary Layers Under Low-Pressure Turbine Airfoil Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Detailed velocity measurements were made along a flat plate subject to the same dimensionless pressure gradient as the suction side of a modern low-pressure turbine airfoil. Reynolds numbers ...
Effects of Concave Curvature on Boundary Layer Transition Under High Freestream Turbulence Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An experimental investigation has been carried out on a transitional boundary layer subject to high (initially 9%) freestream turbulence, strong acceleration (K=(ν/Uw2)(dUw/dx) as high as 9×10−6), ...