Dynamic loads on Francis turbines
, 2016 New installations of unregulated power to the electrical grid have led to more fluctuations in the grid frequency. Hydropower plants with large reservoirs can provide services to balance the frequency by increasing or reducing production in accordance to what is needed.
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Boyle's Law ignores dynamic processes in governing barotrauma in fish. [PDF]
Sci Rep, 2023 Kerr JR +4 more
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Dynamic Analysis of a Francis Turbine
, 2019 Francisturbiner er velkjente installasjoner i norske vannkraftverk. De dynamiske egenskapene til en Francisturbin påvirkes signifikant av miljøet den opererer i, det er derfor et stort ønske å forstå samspillet mellom turbin og vann bedre for å sikre stabil kraftproduksjon.
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Extension of similarity test procedures to cooled engine components with insulating ceramic coatings [PDF]
Material thermal conductivity was analyzed for its effect on the thermal performance of air cooled gas turbine components, both with and without a ceramic thermal-barrier material, tested at reduced temperatures and pressures.
Gladden, H. J.
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Composite wall concept for high temperature turbine shrouds: Heat transfer analysis [PDF]
A heat transfer analysis was made of a composite wall shroud consisting of a ceramic thermal barrier layer bonded to a porous metal layer which, in turn, is bonded to a metal base.
Ludwig, L. P., Stepka, F. S.
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Liquid-cooling technology for gas turbines review and status [PDF]
A review of research related to liquid cooling of gas turbines was conducted and an assessment of the state of the art was made. Various methods of liquid cooling turbines were reviewed.
Stepka, F. S., Vanfossen, G. J., Jr.
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A Multistep Prediction Model for the Vibration Trends of Hydroelectric Generator Units Based on Variational Mode Decomposition and Stochastic Configuration Networks. [PDF]
Sensors (Basel), 2023 Yan S, Chen F, Yang J, Zhao Z.
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Comparison of predicted and experimental external heat transfer around a film cooled cylinder in crossflow [PDF]
Calculations were made of the film cooling provided by rows of holes around the circumference of a cylinder in crossflow and the results were compared to experimental data.
Gaugler, R. E., Stepka, F. S.
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Measurement of Pressure Pulsations in Francis Turbines
, 2010 The work presented in this thesis involves preparation and execution of measurements on Francis runners. The measurements were performed by means of onboard measuring equipment both in model runners and full-scale prototype runners. Also, analysis of the measured data, and the discussion of the results, is presented.
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