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RISRelationship Between Wavy Liquid Film Dynamics and Droplet Formation From Trailing Edge
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Erosion of steam turbine blades due to coarse droplet impingement is a serious problem. The physical relationship is still elusive between the dynamics of wavy liquid film on a wall and the droplet dispersion from the ...
Investigation of Liquid Film Atomization From the Trailing Edge of an Airfoil in a High-Speed Flow-Effect of Trailing Edge Thickness
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. Liquid film atomization from trailing edges is found in numerous applications. These include air blast atomization in prefilming type fuel injectors and shedding from airfoils. This study investigates the effect ...
Investigation of Water Film Dynamics on the Surface of an Airfoil in a High-Speed Flow and Subsequent Ligament Formation and Breakup From the Trailing Edge
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this work, the dynamics of a liquid film on the surface of NACA 0012 airfoil placed in a high-speed air flow is investigated. The findings complement previous results obtained on time averaged ligament behavior and ...
Suppression of Coarse Droplet Formation from Gas-Sheared Liquid Sheets by Controlling the Trailing Edge Shape and Wettability
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. To mitigate the erosion issue in steam turbines, it is crucial to suppress the formation of coarse droplets spreading from the trailing edge upstream as well as from the shroud wall. The droplet size will be ...
Unsteady Steam Turbine Optimization Using High-Fidelity Computational Fluid Dynamics
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents the computational methodology and experimental investigations accomplished to enhance the efficiency of a turbine stage by applying non-axisymmetric profiling on the rotor hub wall. The experimental ...
Unsteady Wet Steam Flow Field Measurements in the Last Stage of Low Pressure Steam Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Modern steam turbines need to operate efficiently and safely over a wide range of operating conditions. This paper presents a unique unprecedented set of timeresolved steam flowfield measurements from the exit of the last ...
Unsteady Flow Field and Coarse Droplet Measurements in the Last Stage of a Low-Pressure Steam Turbine With Supersonic Airfoils Near the Blade Tip
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The largest share of electricity production worldwide belongs to steam turbines. However, the increase of renewable energy production has led steam turbines to operate under part load conditions and increase in size. As a ...
Investigation of Water Films Shed From an Airfoil in a HighSpeed Flow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The breakup of liquid films in highspeed flows is found in many applications. These include prefilming air blast atomization found in fuel injectors and shedding of droplet off of airfoils. In this work, a test rig has ...
Turbine Hub Cavity Modes and Their Impact on Efficiency
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Non-synchronous pressure and temperature fluctuations at the hub cavity of a turbine stage are the main focus of this study. Cavity modes are unsteady fluctuations generated at the cavity exit due to instabilities in this ...