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RISExperimental Study on Impeller Blade Vibration During Resonance—Part I: Blade Vibration Due to Inlet Flow Distortion
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Forming the first part of a two-part paper, the experimental approach to acquire resonant vibration data is presented here. Part II deals with the estimation of damping. During the design ...
Experimental Study on Impeller Blade Vibration During Resonance—Part II: Blade Damping
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Forming the second part of a two-part paper, the estimation of damping is presented here. Part I discusses the experimental approach and the results on blade resonant response measurements. In ...
Three-Dimensional Flow Prediction and Improvement of Holes Arrangement of a Film-Cooled Turbine Blade Using a Feature-Based Jet Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A feature-based jet model has been proposed for use in three-dimensional (3D) computational fluid dynamics (CFD) prediction of turbine blade film cooling. The goal of the model is to be able ...
Influence of Flow Structure on Compound Angled Film Cooling Effectiveness and Heat Transfer
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Film cooling in turbine blades involves injecting cold air through small holes over the surface of the blade to thermally protect it against the incoming hot freestream. Compound angled film ...
Clearance Effects on the Evolution of the Flow in the Vaneless Diffuser of a Centrifugal Compressor at Part Load Condition
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This work reports on flow measurements taken within the vaneless diffuser of a scaled-up model of a small-scale, highly loaded unshrouded compressor with large relative tip clearance. The aims ...
The Cumulative Effects of Forcing Function, Damping, and Mistuning on Blade Forced Response in a High Speed Centrifugal Compressor With Inlet Distortion
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The vibratory response amplitude of a blade under forced response conditions depends primarily on the aerodynamic excitation amplitude, on damping, and on the effects of mistuning. The work ...
Blade Forcing Function and Aerodynamic Work Measurements in a High Speed Centrifugal Compressor With Inlet Distortion
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Centrifugal compressors operating at varying rotational speeds, such as in helicopters or turbochargers, can experience forced response failure modes. The response of the compressors can be triggered ...
Influence of Near Hole Pressure Fluctuation on the Thermal Protection of a Film-Cooled Flat Plate
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The pulsation of film cooling jets in turbines is driven by the near hole pressure fluctuation caused by the deterministic interaction of stator/rotor blade rows. Jet pulsation is characterized ...
Flow Physics and Profiling of Recessed Blade Tips: Impact on Performance and Heat Load
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In axial turbine, the tip clearance flow occurring in rotor blade rows is responsible for about one-third of the aerodynamic losses in the blade row and in many cases is the limiting factor ...
Unsteady Computational Fluid Dynamics Investigation on Inlet Distortion in a Centrifugal Compressor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Blade failure in turbomachinery is frequently caused by an excessive resonant response. Forced response of the blades originates from unsteady fluid structure interactions as conditioned in the ...