Sökning: "Cooling fan noise"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden Cooling fan noise.

  1. 1. Improving the Robustness, Thermal and Noise Performance of a Radio Transmitter Fan Tray

    Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Författare :Mattias Olausson; Selma Rahman; [2022]
    Nyckelord :Fan tray; Heat dissipation; Robustness; Radio transmitter; Noise performance; Fläktlåda; Värmeavledningsförmåga; Robusthet; Radio sändare; Ljudprestanda;

    Sammanfattning : With the growing demand of compact radio transmitters, so do the need for silent and efficient thermal management systems. Given the restricted form-factor, ensuring robustness of a unit with a detachable fan tray imposes a challenge. LÄS MER

  3. 2. Beräkningsmodell för oljekylare

    Uppsats för yrkesexamina på grundnivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Lisa Nordling; [2022]
    Nyckelord :Oljekylare; hydraulik; värmeutveckling;

    Sammanfattning : In this thesis, a calculation model for oil coolers has been worked on for Ursviken Technology AB press brakes Optima and Optiflex. Analysis of the theory behind physical phenomena has shown that a series of factors in a hydraulic system give rise to heat increase of hydraulic oil. LÄS MER

  4. 3. Experimental Study of Installation Effects on Cooling Fan Noise

    Master-uppsats, KTH/Marcus Wallenberg Laboratoriet MWL

    Författare :Yu-Yu Lu; [2021]
    Nyckelord :Electric vehicles; Cooling fan noise; Installation effects; Free-space measurement; Wall-mounted measurement; In-vehicle measurement; Spectral decomposition method; Tonality; Broadband noise level.;

    Sammanfattning : Owing to the ever-changing developments of battery and electric powertrain, vehicle electrification is the trend in the future. Without the presence of a combustion engine, masking effect from it reduces and noises from other components become perceivable. Among all, the cooling fan is one of the major noise sources. LÄS MER

  5. 4. Shape optimization of axial cooling fan via 3D CFD simulation and surrogate modeling

    Master-uppsats, KTH/Strömningsmekanik och Teknisk Akustik

    Författare :Martin Granlöf; [2021]
    Nyckelord :Fan noise; shape optimization; mesh morphing; computational fluid dynamics; computational aeroacoustics; Efficient Global Optimization; Reynolds-averaged Navier-Stokes;

    Sammanfattning : Due to legislative reasons and environmental concerns the automotive and transport sector are shifting their focus from traditional internal combustion engine (ICE) vehicles to development of battery electric vehicles (BEVs). This brings new challanges to design of cooling systems where axial fans are one of the key components. LÄS MER

  7. 5. Cooling Fan Optimization for Heavy Electrified Vehicles : A study on performance and noise

    Master-uppsats, KTH/Flygdynamik

    Författare :Amir Khiabani; Daniel Acebo Alanis; [2020]
    Nyckelord :Electric axial fans; Fan design; Blade design; Battery Electric Vehicle; Fan noise; Fan performance.;

    Sammanfattning : Vehicle electrification plays a significant role in the effort to reduce the environmental impact of the automotive industry. Scania is one of the leading manufacturers ofheavy vehicles which is currently moving towards a sustainable transport system by manufacturing a new generation of heavy vehicles powered by batteries. LÄS MER