Search for dissertations about: "Fan installation effects"

Found 3 swedish dissertations containing the words Fan installation effects.

  1. 1. Investigation of acoustic source characterisation and installation effects for small axial fans

    Author : Per-Olof Berglund; KTH; []
    Keywords : axial fan; airborne sound; source characterisation; transmission path analysis; in-duct. Spherical harmonics;

    Abstract : Fans are often used in equipment such as home appliances andelectronic equipment where the margin of profit is small butcustomers demands on a low noise level are high. Therefore,methods for predicting the noise emitted by an applicationincluding one or several fans are desirable in order toimprove, accelerate and reduce the cost of low-noise design. READ MORE

  2. 2. An experimental and numerical study of an automotive cooling module

    Author : Anders Rynell; Gunilla Efraimsson; Michael Shur; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fan installation effects; spectral decomposition; aeroacoustics; Farkostteknik; Vehicle and Maritime Engineering;

    Abstract : Heavy vehicles are major emitters of noise. Especially at idle or low vehicle speeds a large portion of the noise emanates from the fan that forces the flow through the cooling module. The aim of this work is to investigate and reveal aerodynamic and acoustic installation effects linked to the cooling package. READ MORE

  3. 3. On the Analysis of Energy Efficient Aircraft Engines

    Author : Oskar Thulin; Chalmers University of Technology; []
    Keywords : Performance modelling; Aero engine; Turbofan; Aircraft engine; Installed propulsion; Ultra high bypass ratio; Exergy analysis; Engine weight estimate; Variable area fan nozzle; Multiple pivoting flaps; Translating cowls;

    Abstract : Aero engine performance analysis is highly multidimensional using various measures of component performance such as turbomachinery and mechanical efficiencies, and pressure loss coefficients. Using conventional performance analysis, relying on only the laws of thermodynamics, it is possible to understand how the performance parameters affect the component performance, but it is difficult to directly compare the magnitude of various loss sources. READ MORE