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RISNumerical Simulations of Ice Particle Transport at Representative Turbofan Compressor Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Engine icing threatens compressor operation and service life. Ice crystal ingestion at cruise and descent flight phases results in smaller, partially melted crystals entering the engine core. Here, crystals stick to ...
An Investigation of Flow, Mechanical, and Thermal Performance of Conventional and Pressure Balanced Brush Seals
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Compliant contacting filament seals such as brush seals are well known to give improved leakage performance and hence specific fuel consumption benefit compared to labyrinth seals. The design of the brush seal must be ...
Development and Applications of a Coupled Particle Deposition—Dynamic Mesh Morphing Approach for the Numerical Simulation of Gas Turbine Flows
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The presence and accretion of airborne particulates, including ash, sand, dust, and other compounds, in gas turbine engines can adversely affect performance and life of components. Engine experience and experimental work ...
The Effect of External Casing Impingement Cooling Manifold Standoff Distance on Casing Contraction for Thermal Control of Blade Tip Clearance
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Thermal closure of the engine casing is widely used to minimize undesirable blade tip leakage flows thus improving jet engine performance. This may be achieved using an impingement cooling scheme on the external casing ...
Experimental Deposition of NaCl Particles From Turbulent Flows at Gas Turbine Temperatures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The ingestion and deposition of solid particulates within gas turbine engines has become a very significant concern for both designers and operators in recent times. Frequently aircraft are operated in environments where ...
Reduction in Flow Parameter Resulting From Volcanic Ash Deposition in Engine Representative Cooling Passages
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Internal cooling passages of turbine blades have long been at risk to blockage through the deposition of sand and dust during fleet service life. The ingestion of high volumes of volcanic ash (VA) therefore poses a real ...
Improved Understanding of Stiffness in Leaf Type Filament Seals
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Filament seals, such as brush seals and leaf seals, are investigated as a potential improved seal for gas turbine applications. As these seals operate in contact with the rotor, a good understanding of their stiffness is ...
The Relative Performance of External Casing Impingement Cooling Arrangements for Thermal Control of Blade Tip Clearance
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: As a key way of improving jet engine performance, a thermal tip clearance control system provides a robust means of manipulating the closure between the casing and the rotating blade tips, reducing undesirable tip leakage ...
Experimental Investigation of a Leaf Seal Prototype at Engine Representative Speeds and Pressures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The application of compliant filament seals to jet engine secondary air systems has been shown to yield significant improvements in specific fuel consumption and improved emissions. One such technology, the leaf seal, ...
Analytical Modeling and Experimental Validation of Heating at the Leaf Seal/Rotor Interface
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The secondary air system of a modern gas or steam turbine is configured to satisfy a number of requirements, such as to purge cavities and maintain a sufficient flow of cooling air to key engine components, for a minimum ...