Sökning: "fluctuating pressure"

Visar resultat 1 - 5 av 31 avhandlingar innehållade orden fluctuating pressure.

  1. 1. Characteristics of mean and fluctuating surface pressure distributions on tubes in tandem arrangement and in-line tube bundles

    Författare :Lars Ljungkrona; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; flow visualizations; in-line square tube bundle; pressure distributions; free-stream turbulence; pressure fluctuations; in-line arrangement; circular cylinders in cross-flow; Strouhal numbers; tandem arrangement;

    Sammanfattning : .... LÄS MER

  3. 2. Measuring with pressure sensitive paint in time-varying flows

    Författare :Markus Pastuhoff; Henrik Henrk Alfredsson; Ulrich Henne; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Pressure sensitive paint; fluid mechanics; internal flow; pulsating flow;

    Sammanfattning : Increasingly tougher legislation on internal combustion engine emissions drives the development towards smaller engines with higher efficiency where an important component is the gas-exchange system and especially the turbocharger. The flow in the gas-exchange system is inherently pulsating and unsteady and the present thesis aims at investigating if and how pressure sensitive paint (PSP) can be used for internal unsteady flows of relevance for engine applications. LÄS MER

  4. 3. On the use of silicon based sensors for measurement of fluctuating pressure and wall shear stress

    Författare :Theodoros Hadzianagnostakis; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : .... LÄS MER

  5. 4. Analysis of the Unsteady Flow Field of a Passenger Vehicle

    Författare :Lennert Sterken; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wind tunnel; Wake; CFD; Pressure measurements; Extensions; Yaw response; External aerodynamics; Aerodynamic forces;

    Sammanfattning : Political legislation and consumer requirements for a sustainable society require that vehicle manufacturers focus on reduced fuel consumption and lower emissions. Areduction in the overall energy consumption can be directly linked to a decrease of the driving resistance, where the aerodynamic drag significantly contributes at velocities above 70km/h. LÄS MER

  7. 5. Exploring the microbiota of the gastrointestinal tract

    Författare :Jie Xu; Avdelningen för livsmedel och läkemedel; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Microbiota; Probiotics; Blood pressure; High fat diet; Oat; Green tea; Berry; Fiber; Exopolysaccharides; Ulcerative colitis;

    Sammanfattning : Abstract: Balanced microbiota of the gastrointestinal (GI) tract is important for maintaining health of the host. Altered gut microbiota have been found to be associated with various life-style induced and other intestinal inflammatory diseases. Gut microbiota is viewed as a metabolic organ and considered as new target for therapies. LÄS MER