In order to study the actual work of the car fan, the cooling fan and condensing fan models were established by PRO/E, models were meshed by the GAMBIT and the boundary conditions were set by FLUENT, and the flow and noise were simulated to compare with the experimental result which showed the availability. Most of the fan noise belong to dipole noise, therefore, according to the dipole generating mechanism of the sound source, the windshield was set on the axis of the model to reduce eddy current noise. Simulation results show that the distance of windshield and fans have a direct effect on optimization. Three plans were considered in the thesis, finally,we got the result the noise was reduced by 2.6 dB at most after optimization. It was showed that an optimal distance exists between windshield and fan that could reduce noise to a minimum. This method is an indirect method, which could reduce noise without changing the process, and has the advantage of low cost, applicability and high feasibility. Automobile has become very important traffic tool in People’s daily life, when it brings convenience to our life, it also have had a profound impact on our environment. Noise pollution and air pollution have influenced people healthy living environment, and fan noise is one of the main components of automobile noise. According to the noise separation experimental data shows, when the car is at the first and second gear, the percentage of fan noise is 24.7 % [1] in the engine acceleration noise. The main noise frequency concentrated in the 100 ~ 4,000 Hz, with the speed increased, the percentage of fan noise will rise sharply [2]. So it is premised on ensuring the flow of fan, the study on reducing fan noise is very important to the influence of vehicle noise.


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    Titel :

    The CFD and Noise Simulating Research of Fan Based on the Dipole Noise Theory


    Weitere Titelangaben:

    Lect. Notes Electrical Eng.


    Beteiligte:
    Zhu, Qing (Autor:in) / Yuan, Zhaocheng (Autor:in) / Liu, Chong (Autor:in) / Ma, Jiayi (Autor:in)


    Erscheinungsdatum :

    2012-11-07


    Format / Umfang :

    16 pages





    Medientyp :

    Aufsatz/Kapitel (Buch)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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