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Showing 1 to 8 of 8 for “"axial turbines"”.
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Secondary air interaction with main flow in axial turbines
… injected through seals in the hub and shroud of axial turbines to prevent hot gas ingestion into the endwall cavities. An investigation into the interaction of purge ow with turbine main ow has been undertaken, to determine where losses are generated, how they are generated, and what are the most …
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Performance Improvement through Velocity Triangle Optimization-Driven Redesign for Mitigating the Horseshoe Vortex in Axial Turbines
… end wall/primary flow interaction region of an axial turbine stage induce three-dimensional vortical flow structures, such as the leading edge horseshoe vortex, resulting in significant aerodynamic performance deterioration. Reducing the effect of such flow instabilities requires turbine blade …
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The effects of temperature distortion on aerodynamics and low engine order forced response in axial turbines
… environment additional parameters arise as gas turbines are challenged to adapt to variations of the fuel composition driven by the need of efficient and lowCO2 power generation. Introducing syngas, a synthesis gas fuel that is used to power integrated gasification combined cycle (IGCC) power …
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Impact of unsteady secondary air flow interaction with main flow on loss generation in axial turbines
… between stationary vanes and rotating rotors in axial turbines to prevent ingestion of the hot working gas into the endwall cavities. Three-dimensional flow computations, unsteady as well as steady, have been carried out to assess the role of vane-rotor stage induced flow unsteadiness on loss …
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A Unified Turbine Preliminary Design Study
… trend across all architectures was found. Turbines with high duty flow coefficient have characteristically high surface velocities and turbines with lower values of duty flow coefficient are characterised by high surface area. However, the balance between area and surface velocity of the …
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Loss mechanisms in turbine tip clearance flows
… associated with tip leakage in unshrouded axial turbines. Mix- ing loss between the leakage, which takes the form of a strong embedded streamwise vortex (u=ux 1 in the vortex core), and the mainstream ow is found to be the main source of loss. Vortex line contraction, and consequent vortex …