کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7152450 1462398 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Acoustic characteristics of a heavy duty vehicle cooling module
ترجمه فارسی عنوان
ویژگی های آکوستیک ماژول خنک کننده خودرو
کلمات کلیدی
سر و صدای فن، اثرات نصب، از دست دادن انتقال، از دست دادن درج، تجزیه طیفی،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
Studies dedicated to the determination of acoustic characteristics of an automotive cooling package are presented. A shrouded subsonic axial fan is mounted in a wall separating an anechoic- and a reverberation room. This enables a unique separation of the up- and downstream sound fields. Microphone measurements were acquired of the radiated sound as a function of rotational speed, fan type and components included in the cooling module. The aim of the present work is to investigate the effect of a closely mounted radiator upstream of the impeller on the SPL spectral distribution. Upon examination of the SPL spectral shape, features linked specifically to the source and system are revealed. The properties of a reverberant sound field combined with the method of spectral decomposition permit an estimation of the source spectral distribution and the acoustic transfer response, respectively. Additionally, purely intrinsic acoustic properties of the radiator are scrutinized by standardized ISO methods. A new methodology comprising a dipole sound source is adopted to circumvent limitation of transmission loss measurement in the low frequency range. The sound attenuation caused by the radiator alone was found to be negligible.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Acoustics - Volume 111, October 2016, Pages 67-76
نویسندگان
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