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Showing 1 to 17 of 17 for “"Low Pressure Turbine"”.
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Influence of Reynolds number and blade geometry on low pressure turbine performance
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.
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Effects of Spanwise and Discrete Disturbances on Separating Boundary Layers on Low Pressure Turbine Blades
Flow measurements were made on two highly loaded, low pressure turbine blade configurations in a low-speed, linear cascade facility. The L1M blade has a design Zweifel coefficient of 1.34 with a peak cp near 47% cx (mid-loaded) and the Pack B blade has a design Zweifel coefficient of 1.15 with a …
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CFD Modeling of Separation and Transitional Flow in Low Pressure Turbine Blades at Low Reynolds Numbers
… in design methods and performance prediction for turbine engines operating at low Reynolds numbers. In this regime, boundary layer separation may be more likely to occur in the turbine flow passages. For accurate CFD predictions of the flow, correct modeling of laminar-turbulent boundary layer …
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Influence of heat treatment condition on the stress corrosion cracking properties of low pressure turbine blade steel FV520B
… the power generating industry especially in low pressure (LP) steam turbine blades operating in the phase transition zone. An investigation has therefore been conducted to examine the effect of heat treatment condition on the microstructure, mechanical properties and SCC properties of one …
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Influence of the heat treatment procedure on the stress corrosion cracking behaviour of low pressure turbine blade material FV566
… is one of the leading damage mechanisms in low-pressure turbines in the power generation industry; in LP turbine blades it primarily occurs in the last stage blades. The research investigated the influence of tempering temperature on the microstructure, mechanical properties, and stress …
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Heat Transfer, Transition, And Aerodynamic Loss In A Linear Vane Cascade At Low Reynolds Numbers In High Speed Flows
<p>Low pressure turbine research is essential for improving the efficiency of the modern gas turbine engine. At high altitude cruise conditions, the low pressure turbine experiences low Reynolds number flow, which produces a laminar boundary layer on airfoil surfaces. The integrity of the laminar …
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The Effects of Shrouded Rotor Tip Leakage Flow on the Downstream Stator Aerodynamics in Turbines
… civil aeroengines the fan is driven by the low pressure turbine. In order to match the low rotational speed of the fan, the low pressure turbine consists of large diameter components and several stages, up to six or seven. An individual stage of a low pressure turbine consists of a row of …
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The Effects of Vortex Generator Jet Frequency, Duty Cycle, and Phase on Separation Bubble Dynamics
… effective in minimizing the separation losses on low-pressure turbine blades at low Reynolds numbers. Experimental data collected using phase-locked particle image velocimetry and substantiated with a hot-film anemometer were used to answer fundamental questions about the influence of VGJs on a …
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Numerical lnvestigation of Disturbance Environments in Low Pressure Turbines
… various disturbance environments existing in a low pressure turbine (LPT) are investigated. In particular, the effects of free-stream turbulence (FST), unsteady wakes, roughness and blade oscillations on the separation-induced transition on the suction surface of a low pressure turbine blade are …
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HIPProzess für offen porösen Stahl X20Cr13
Last stage rotor blades of low pressure steam turbines are still being under consideration. In order to increase the effectiveness of the low pressure turbine a new open porosity powder metallurgical composite should be developed, so that the condensed water could be sucked off over the whole …
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Conceptual Design and Instrumentation Study for a 2-D, Linear, Wet Steam Turbine Cascade Facility
The design of last stage low pressure steam (LP) turbines has become increasingly complicated as turbine manufacturers have pushed for larger and more efficient turbines. The tip sections of these LP turbines encounter condensing wet steam at high velocities resulting in increased losses. These …
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Understanding the Responses of a Metal and a CMCTurbine Blade during a Controlled Rub Event using a Segmented Shroud
… by significant reduction of the cooling flow bled from the compressor. The turbine inlet temperature has consistently increased over the past 70-years. Materials like CMC are typically used in areas such as the LPT, or low-pressure turbine, where reliability at high-temperatures beyond the …
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Phase Locked Flow Measurements of Steady and Unsteady Vortex Generator Jets in a Separating Boundary Layer
… separation control on the suction side of a low pressure turbine (LPT) blade at low Reynolds numbers. The flow mechanisms responsible for this control were studied and documented in order to provide a basis for future improvements in LPT design. Data were collected using a stereo PIV system …
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Optimisation of feedwater heaters and geothermal preheater in fossil-geothermal hybrid power plant
… with a geothermal preheater substituting the low-pressure feedwater heater were designed. The Engineering Equations Solver (EES) software was used to perform an analysis of the thermodynamic performance of the two models designed. The models were used to analyse the energetic and exergetic …
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Optimization and hybridization of membrane-based oxy-combustion power plants
… (AZEP) cycles. More specifically, existing flowsheets for zero and partial emissions are optimized, and new integration schemes with solar energy are proposed and analyzed. First, optimal design and operation of AZEP cycles, both zero and partial emissions, is considered. AZEP consists of a …
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The study and control of wall bounded flows : El estudio y control de flujos de pared
Turbulent wall-bounded flows are important, because many of the flows found in industry and nature belong to this type of flows. One of the examples is the flow in the low pressure turbine part of an engine. Efficiency can be increased by increasing the curvature of the blades. However, this leads …