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RISSeismic Performance of Multimegawatt Offshore Wind Turbines in Liquefiable Soil under Horizontal and Vertical Motions
Publisher: ASCE
Abstract: Various multimegawatt capacity offshore wind turbines (OWTs) are constructed globally to fulfill increasing energy demand. Many of these structures have already been and will continue to be constructed in seismically active ...
Wettability Effects on Falling Film Flow and Heat Transfer Over Horizontal Tubes in Jet Flow Mode
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The performance of a falling-film heat exchanger is strongly linked to the surface characteristics and the heat transfer processes that take place over the tubes. The primary aim of this numerical study is to characterize ...
Bend Geometries in Internal Cooling Channels for Improved Thermal Performance
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The pressure drop and heat transfer in a two pass internal cooling channel with two different bend geometries is experimentally studied with the goal of improving the thermal performance factor (TPF) in the coolant channel. ...
Experimental and Computational Study of Heat/Mass Transfer and Flow Structure for Four Dimple Shapes in a Square Internal Passage
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Mass/heat transfer measurements are made using the naphthalene sublimation method in a square internal passage where one wall has a single dimple. Four types of dimple shapes are studied: square, ...
Heat Transfer at High Rotation Numbers in a Two-Pass 4:1 Aspect Ratio Rectangular Channel With 45deg Skewed Ribs
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Heat transfer measurements are reported for a rotating 4:1 aspect ratio (AR) coolant passage with ribs skewed 45deg to the flow. The study covers Reynolds number (Re) in the range of ...
Effect of Bend Geometry on Heat Transfer and Pressure Drop in a Two Pass Coolant Square Channel for a Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents a comparative numerical study of turbulent flow inside a twopass internal cooling channel with different bend geometries. The goal is to find a geometry that reduces the bend related pressure loss and ...
Turbine Blade Tip Film Cooling With Blade Rotation—Part I: Tip and Pressure Side Coolant Injection
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An experimental study of film cooling is conducted on the tip of a turbine blade with a blade rotation speed of 1200 rpm. The coolant is injected from the blade tip and pressure side (PS) holes, and the effect of the ...
Turbine Blade Tip Cooling With Blade Rotation—Part II: Shroud Coolant Injection
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this paper, blade tip cooling is investigated with coolant injection from the shroud alone and a combination of shroud coolant injection and tip cooling. With a nominal rotation speed of 1200 rpm, each blade consists ...
Improved Film Cooling Effectiveness With a Round Film Cooling Hole Embedded in a Contoured Crater
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Studies of film cooling holes embedded in craters and trenches have shown significant improvements in the film cooling performance. In this paper, a new design of a round film cooling hole embedded in a contoured crater ...
Heat Transfer Enhancement Using Angled Grooves as Turbulence Promoters
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An experimental study is conducted on a simulated internal cooling channel of a turbine airfoil using angled grooves and combination of groovesribs to enhance the heat transfer from the wall. The grooves are angled at 45 ...