Sökning: "fluid limit"

Visar resultat 1 - 5 av 100 avhandlingar innehållade orden fluid limit.

  1. 1. Transients in high head Francis turbines

    Författare :Chiragkumar Trivedi; Luleå tekniska universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Francis turbine; load variation; load rejection; start-stop; emergency shutdown; transient; runaway; computational fluid dynamics; runner; transients; blade; power grid; Engineering mechanics - Fluid mechanics; Teknisk mekanik - Strömningsmekanik; Strömningslära; Fluid Mechanics;

    Sammanfattning : On demand energy market and favourable government policies to encourage the usage of renewable energy have led to a dramatic increase of grid connected wind, solar, and other power in recent years. Penetration of the power above manageable limit, produced using intermittent energy sources, to meet the demand has induced instable grid operations. LÄS MER

  2. 2. The influence of inertia on the rotational dynamics of spheroidal particles suspended in shear flow

    Författare :Tomas Rosén; Fredrik Lundell; Minh Do-Quang; Johan Revstedt; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fluid mechanics; dispersed particle flows; inertia; non-spherical particles; non-linear dynamics; Teknisk mekanik; Engineering Mechanics;

    Sammanfattning : Dispersed particle flows occur in many industrial, biological and geophysical applications. The knowledge of how these flow behave can for example lead to improved material processes, better predictions of vascular diseases or more accurate climate models. LÄS MER

  3. 3. LES of Jets and Sprays Injected into Crossflow

    Författare :Mirko Salewski; Strömningsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gaser; fluid dynamics; large eddy simulation; spray; plasmas; Gases; lagrangian particle tracking; jet in crossflow; fluiddynamik; plasma;

    Sammanfattning : The objective of this thesis is to numerically simulate a fluid jet injected into a crossflow of the same or another fluid, respectively. Such flows are encountered in many engineering applications in which cooling or mixing plays an important role, e.g. gas turbine combustors. LÄS MER

  4. 4. A sensitivity analysis of the Winter-Kennedy method

    Författare :Binaya Baidar; Michel J. Cervantes; Mikael Sendelius; Luleå tekniska universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydropower; discharge; Winter-Kennedy; CFD; Sensitivity; Strömningslära; Fluid Mechanics;

    Sammanfattning : Hydropower is among the lowest-cost electrical energy sources due to its long lifespan and lower operation and maintenance cost. The hydro-mechanical components of hydropower plants generally last about four to five decades, then they are either overhauled or replaced. LÄS MER

  5. 5. On cerebrospinal fluid markers of HIV-1 infection

    Författare :Lars-Magnus Andersson; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; HIV-1; cerebrospinal fluid; AIDS dementia complex; ganglioside GD3; Tau proteins; neopterin; HIV-1 RNA; blood-brain barrier; albumin ratio; cultivation;

    Sammanfattning : HIV-1 infects the central nervous system early in the course of infection and neurological complications are common in HIV-1-infected individuals. Approximately 20% of individuals with acquired immunodeficiency syndrome (AIDS) not treated with antiretroviral therapy develop a subcortical dementia, AIDS dementia complex (ADC). LÄS MER