کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
288281 509616 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Surface roughness effects on noise from pipe jets
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Surface roughness effects on noise from pipe jets
چکیده انگلیسی

Experiments are conducted to study the influence of surface roughness on the noise emitted from underexpanded pipe jets. Two sets of circular pipes of different orders of surface roughness are considered, and the pipe lengths are varied between 1 and 6 diameters. The blowdown studies are performed in the range of pressure ratios varying from 2 to 7. Acoustic measurements at various underexpansion levels indicate that although screech frequencies remain unaltered with surface roughness, the tonal sound pressure levels differ by almost 10 dB.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Sound and Vibration - Volume 332, Issue 4, 18 February 2013, Pages 839–849
نویسندگان
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