Sökning: "viscous losses"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden viscous losses.

  1. 1. Multiscale & Multiphysics Modelling of Thrust Pad (Air) Bearings

    Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Nipon Roy; [2023]
    Nyckelord :Finite element modelling; Air bearing; Multiphysics simulations; Air lubrication; surface texture; Topology optimization;

    Sammanfattning : Without lubrication, machines are not imaginable to perform over a long period of time and complete their designated operations. With its omnipresent availability, the air is capable of functioning as a lubricant in long operations very efficiently. Moreover, thrust bearings support axial loads and transmit power at the same time under heavy loads. LÄS MER

  3. 2. Fluid flow features in swirl injectors for ethanol fueled rocket : - Analysis using computational fluid dynamics

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Emil Vejlens; Dylan De Jourday; [2022]
    Nyckelord :Fluid Mechanics; Rocket Science; Fuel injectors; Computational Fluid Dynamics; Swirling Flows; Fuel Mixing;

    Sammanfattning : A swirl injector for a rocket engine being developed by \emph{AESIR} (Association of EngineeringStudents in Rocketry) was simulated with different geometric parameters. The swirl injector is usedto atomize the ethanol used as fuel and to create a spray that mixes well with the oxidizer withinthe combustion chamber. LÄS MER

  4. 3. Development of Test Rig and Experimental Evaluation of Hydrostatic Bearings for an Axial Flux Machine

    Master-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Amir Avdic; Kishore-Babu Vejendla; [2022]
    Nyckelord :viscous losses; hydrostatic bearing; hydrodynamics; thin oil film.; Viskösa förluster; generator; hydrostatiska lager; hydrodynamik; tunn oljefilm.;

    Sammanfattning : A novel electric machine design, similar to an axial flux machine, incorporates hydrostatic bearings to increase efficiency and stability of said machine. In this thesis, the feasibility of a hydrostatic solution is explored and evaluated by development, manufacturing, and assembly of a test rig, as well as running experimental tests with it. LÄS MER

  5. 4. Dynamic Torque Modeling of a Wet Lamella Clutch Pack

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Industriell elektroteknik och automation

    Författare :Jacob Wallersköld; Johan Appelros; [2021]
    Nyckelord :wet lamella clutch; friction modeling; torque modeling; torque accuracy; force measurements; system identification; grey-box modeling; Technology and Engineering;

    Sammanfattning : Wet lamella clutches are used in the automotive industry to enable all-wheel drive and thereby increase acceleration, handling and safety of cars. The clutches work by transmitting torque from an incoming- to an outgoing shaft through a series of lamella - steel-disc friction surfaces (lamella pack), lubricated by an oil. LÄS MER

  7. 5. Acoustic Analysis of Wave-Guide and MEMS Microphone in Camera Including Thermoviscous Losses

    Uppsats för yrkesexamina på avancerad nivå, Blekinge Tekniska Högskola

    Författare :Karolis Poskus; [2018]
    Nyckelord :;

    Sammanfattning : Today Micro Electrical Mechanical Systems (MEMS) microphones are available in a range of electronic consumer products such as smart phones, tablets, smartwatches and surveillance cameras. The MEMS microphones are usually attached to a circuit board with a hole that lets sound propagate through, as well as additional wave-guides which alter the MEMS microphones original frequency response. LÄS MER