Sökning: "guide vanes"

Visar resultat 1 - 5 av 19 uppsatser innehållade orden guide vanes.

1. 1. CFD Based External Heat Transfer Coefficient Predictions on a Transonic Film-Cooled Gas Turbine Guide Vane : A Computational Fluid Dynamics Study on the Von Karman Institute LS94 Test Case

   Master-uppsats, Linköpings universitet/Mekanisk värmeteori och strömningslära

   Författare :Rosalie Johnsson; Lilian Asiegbu; [2022]
   Nyckelord :gas turbine; turbine inlet guide vane; film-cool; film cool; Computational Fluid Dynamics; CFD; heat transfer coefficient; Shear Stress Transport k-ω; SST k-ω; Scale Resolving Hybrid; SRH; turbulence modelling;

   Sammanfattning : The turbine inlet guide vanes of a gas-turbine are subjected to extreme hot gas temperatures which increases the risk of mechanical failure and overall reduces the component lifespan. Hence, it is of great interest for gas-turbine manufacturers to establish methods for accurately estimating the temperature distribution along the vane surface. LÄS MER

3. 2. Optimization of Kaplan turbines for frequency regulation in hybrid hydropower plants

   Master-uppsats, Uppsala universitet/Institutionen för elektroteknik

   Författare :Nayan Narkhede; [2022]
   Nyckelord :Kaplan; Kaplan turbines; frequency regulation; hybrid hydropower plants; wear and tear; guide vanes; runner blades;

   Sammanfattning : The increasing penetration of variable renewable energy sources in the Nordic Power System is causing frequency quality degradation and has increased the importance of primary frequency control provided by hydropower plants. Hydropower is the world’s largest renewable energy source. LÄS MER

4. 3. Numerical simulations of the pressure time method in a full-scale turbine

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Författare :Hugo Jönsson; [2019]
   Nyckelord :;

   Sammanfattning : Efficiency measurements are an important part of operating and maintaining a hydroelectric turbine. In order to calculate the efficiency, one need a method to accurately measure the flow rate. The pressure time method is a way to calculate the flow rate from pressure measurements, which are done during a transient. LÄS MER

5. 4. Effect of Surface roughness for Hydro Turbine Step-up Efficiency

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Författare :Ermias Beraki; [2018]
   Nyckelord :Hydropower; Surface roughness; Hydro Turbine; Step-up Efficiency; IEC 62097 standard; Prototype and Model;

   Sammanfattning : The energy produced by the flow of water is known as hydropower. It is an easily accessible and available source of energy in large quantity in the form of, rivers, lakes, streams and runoffs around the world. Hydropower is dependent upon hydrological cycle hence; this beneficial characteristic of hydropower makes it a renewable source of energy. LÄS MER

7. 5. CFD calculations and comparison with measured data in a film cooled 1.5 stage high pressure test turbine : With two configurations of swirlers clocking

   Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

   Författare :Ellen Hallbäck; [2018]
   Nyckelord :Turbine; CFD; Clocking configuration; Turbin; CFD; virvlareposition;

   Sammanfattning : The gas turbine has an important role for the energy distribution due to its stability and flexibility. By increasing turbine inlet temperature (TIT) an increased thermal efficiency of the turbine can be achieved. The biggest limitation of the TIT is the material of the turbine components. LÄS MER