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Showing 1 to 20 of 26 for “"Guide Vanes"”.
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Aerodynamic design of moveable inlet guide vanes for active control of rotating stall
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
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Step Misaligned and Film Cooled Nozzle Guide Vanes at Transonic Conditions: Heat Transfer
… have on the endwall heat transfer for nozzle guide vanes in a land based power generation gas turbine at transonic conditions. Endwall Nusselt Number and adiabatic film cooling effectiveness distributions were experimentally calculated and compared with qualitative data gathered via oil paint …
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An experimental study of the aft guide vanes of an engine bypass nacelle for low-boom supersonic flight
… flow around the gearbox, a set of thin forward guide vanes, and a set of thick, strut-like aft guide vanes. The aft guide vanes, which also serve structural purposes, are used to direct the flow such that the exhaust is a uniform, nearly-full annular cross-section, and to choke and then …
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An experimental study of the forward guide vanes of an engine bypass nacelle for low-boom supersonic flight
Made available in DSpace on 2011-08-25T22:16:42Z (GMT). No. of bitstreams: 3 Herrera_Arthur.pdf: 9040481 bytes, checksum: b1cb32088f9dbae91d7f22098b17feb2 (MD5) license.txt: 4064 bytes, checksum: e734bd04ed7c751742bd7380d9b55410 (MD5) Herrera_Arthur.docx: 22589106 bytes, checksum: …
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An experimental study of improvement of a micro hydro turbine performance
… is followed by some details on the design of guide vanes, runner blades and draft tube of axial flow turbines, these components being usually regarded as areas which have major impact on the performance of hydraulic turbines. The next chapter gives the details of the test circuit that was …
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Improvements to a key contributor of frequency control : the co-ordination of guide vane operation in a pumped storage plant
… long term. From this, the co-ordination of the guide vanes at pumped storage plants was selected. Pumped storage units exhibit a non-minimum phase characteristic which can negatively affect the frequency response on the grid. Attempts were made to improve this system’s contribution to frequency …
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Shock wave end wall boundary layer interaction in a transonic compressor rotor
… transonic compressor designed without inlet guide vanes was used in this flow field investigation. Measurements of the flow velocity were made within the first stage rotor passage of this transonic compressor. Laser measurements were made in two blade passages at six axial locations from 10% …
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Aplicação de controle preditivo não linear multivariável com otimizador à operação transiente de turbina a gás
… by adjusting the position of the variable inlet guide vanes of the compressor. The nonlinear dynamic behavior of a gas turbine with an industrial configuration is modeled with the aid of a first principle process simulator, which solves the mass and energy balances and the equations of state and …
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Computational Assessment of Flow through a High-Flow Nacelle Bypass for Low Supersonic Boom
… around a gearbox through a set of inlet and exit guide vanes. To assess the flow quality within the bypass, computational studies are conducted using traditional RANS-based methods. Three levels of geometric complexity are considered—including the full engine, only the aft vane sections, and only …
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Towards a silent fan: an investigation of low-speed fan aeroacoustics
… interaction tones even with a number of guide vanes chosen to satisfy the Tyler-Sofrin theory cut-off criteria. This is thought to be due to abrupt radius change after the guide vanes in the rig (while the theory assumes constant radius). In the product, abrupt radius change also occurs. …
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Aerodynamic performance measurements of a fully scaled, film-coated, turbine stage
… configuration. A solid blade and nozzle guide vane set was machined via electro-discharge machining, laser drilling, and laser welding to provide film-cooling holes and manifold channels. The effective area (CdA) of the film-cooling holes was measured and part-to-part variations …
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Correlation between Unsteady Loading and Tip Gap Flow Occurring in a Linear Cascade with Simulated Stator-Rotor Interaction
… flow created by the junction of a set of inlet guide vanes and the compressor casing, vortex generators were glued to a moving end wall. In this investigation, the tip clearance was varied from 0.83% to 12.9% chord. Measurements of the midspan and the tip blade loading were made using static …
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Developing and Testing a Combustor Simulator For Investigating High Pressure Turbine Aerodynamics and Heat Transfer
Within a gas turbine engine, the turbine nozzle guide vanes are subjected to very harsh conditions from the highly turbulent and hot gases exiting the combustor. The temperature and pressure fields exiting combustors are highly nonuniform and dictate the heat transfer and aero losses that occur in …
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Steady and Unsteady Heat Transfer in a Film Cooled Transonic Turbine Cascade
… from the trailing edge of modern turbine nozzle guide vanes and impinging on downstream rotor blades is modeled in a linear cascade. The Reynolds number based on blade chord and exit conditions (5*10^6) and the exit Mach number (1.2) are representative of modern engine operating conditions. The …
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Noise Reduction in an Axisymmetric Supersonic Aircraft Inlet using Trailing Edge Blowing
… fan disturbances such as struts or inlet guide vanes (IGV). The elimination of the wakes will provide a uniform flow field at the engine fan face and reduce noise at the blade passing frequency. The TEB was implemented on six non-uniformly spaced support struts in the inlet. Acoustic tests …
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The Turgo impulse turbine : a CFD based approach to the design improvement with experimental validation
… injector geometry as well as the branch pipe and guide vanes. 3.Manufacture and experimental testing of the original and optimised Turgo runners. 4.Manufacture and experimental testing of the original and optimised injector designs. 5.Verification of the numerical models developed in 1.) and 2.) …
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Scattering by porous aerofoil adaptations
… to turbo-machinery noise through fan blades and guide vanes. The study of owl flight has led to numerous bio-inspired adaptations designed to reduce aerodynamic noise passively. Firstly, through material changes: porosity, elasticity, and surface treatments; secondly, through geometric or …
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Development of a high-speed rotating bar mechanism
… to those shed from the trailing edges of nozzle guide vanes of a transonic turbine. Considerable design effort was required for the RBM due to its relatively high operating speed. As the result of a finite element stress analysis, a unique method of securing the disk to the shaft was developed. …
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On the Challenges of integrating a Rotating Detonation Combustor with an Industrial Gas Turbine and important design considerations for Row-1 Blades
… challenges of integrating the RDC with nozzle guide vanes (NGV) of an industrial, can-annular gas turbine and attempts to understand the major contributors that impact efficiency and identify the key areas of optimization that need to be considered for maximizing performance. In order to …
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Experimental Investigation of Fan Rotor Response to Inlet Swirl Distortion
… that off-design conditions entered the fan exit guide vanes, likely contributing to cascading performance deficiencies in downstream components and reducing the performance of the propulsor system.
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