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RISExperimental Investigation of the Interblade Flow in a Kaplan Runner at Several Operating Points Using Laser Doppler Anemometry
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents laser Doppler anemometry (LDA) measurements within the runner blade channels and at the runner outlet of a Kaplan turbine model. The model was investigated at six operating points located on two propeller ...
Uncertainty Quantification of Aerodynamic Icing Losses in Wind Turbine With Polynomial Chaos Expansion
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: Icing of wind turbine blades poses a challenge for the wind power industry in cold climate wind farms. It can lead to production losses of more than 10% of the annual energy production. Knowledge of how the production is ...
Wind Turbine Aerodynamic Modeling in Icing Condition: Three-Dimensional RANS-CFD Versus Blade Element Momentum Method
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: Icing limits the performance of wind turbines in cold climates. The prediction of the aerodynamic performance losses and their distribution due to ice accretion is essential. Blade element momentum (BEM) is the basis of ...
Uncertainty Quantification of Aerodynamic Icing Losses in Wind Turbine With Polynomial Chaos Expansion
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Icing of wind turbine blades poses a challenge for the wind power industry in cold climate wind farms. It can lead to production losses of more than 10% of the annual energy production. Knowledge of how the production is ...
Wind Turbine Aerodynamic Modeling in Icing Condition: Three-Dimensional RANS-CFD Versus Blade Element Momentum Method
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Icing limits the performance of wind turbines in cold climates. The prediction of the aerodynamic performance losses and their distribution due to ice accretion is essential. Blade element momentum (BEM) is the basis of ...
A Study of the Velocity Field During Mitigation of Vortex Breakdown in Model Francis Turbine at High Load
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Off-design operation leads to the development of flow instabilities like vortex breakdown phenomenon which manifests as an enlarged vortex core in the draft tube at high load operating conditions. These flow instabilities ...
Mitigation of the Pressure Pulsations in an Axial Turbine at Speed-No-Load With Independent Guide Vanes Opening
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Hydraulic turbines are operated more frequently at no-load conditions, also known as speed-no-load (SNL), to provide a spinning reserve that can rapidly connect to the electrical grid. As intermittent energy sources gain ...
Experimental Study of The Pressure-Time Method With Potential Application for Low-Head Hydropower
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The pressure-time method allows measuring the flowrate in hydraulic turbines, according to IEC 60041 standard. According to this standard, the applicability of the pressure-time method is limited to a straight pipe with a ...
Experimental Investigation of Part Load Vortex Rope Mitigation With Rod Protrusion in an Axial Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The present paper investigates the rotating vortex rope (RVR) mitigation on an axial turbine model by the radial protrusion of four cylindrical rods into the draft tube. RVR mitigation is of particular interest due to the ...
Repeatability in Measurements and Control Settings of a Small Francis Turbine Test Rig
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A reduced scaled-down hydraulic turbine test setup has been designed. The test setup is made to investigate the mitigation of pressure pulsations like the rotating vortex rope (RVR) and its formation and problems related ...