Sökning: "Daniel Marjavaara"

Hittade 3 avhandlingar innehållade orden Daniel Marjavaara.

1. 1. CFD driven optimization of hydraulic turbine draft tubes using surrogate models

   Författare :Daniel Marjavaara; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

   Sammanfattning : The efficiency of a hydraulic reaction turbine is significantly affected by the performance of its draft tube. The shape and velocity distribution at the inlet are, in next turn, two main factors that affects the performance of the draft tube. LÄS MER

3. 2. Parameterisation and flow design optimisation of hydraulic turbine draft tubes

   Författare :Daniel Marjavaara; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

   Sammanfattning : In the present energy market, the demands of rehabilitation and modernisation of old constructions are increasing. Among the renewable energy resources, hydropower offers one of the highest potential for further improvements due to the fact that a great number of hydropower plants are ageing and that they are run at off-design conditions. LÄS MER

4. 3. CFD Simulation of Jet in Asymmetric Co-flows in a Down-scaled Rotary Kiln Model

   Författare :Ziyan Teng; Staffan Lundström; Sofia Larsson; Daniel Marjavaara; Christian Fredriksson; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

   Sammanfattning : Rotary kilns are industrial furnaces that have been widely used in limestone calcination, cement industry and hazardous waste incineration for centuries. In this work a rotary kiln used for the iron ore pellet sintering process in the grate-kiln pelletizing system has been studied. LÄS MER