کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
656028 | 1457667 | 2008 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Growth of turbulent spots in high-speed boundary layers on a flat plate
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Growth of turbulent spots in high-speed boundary layers on a flat plate Growth of turbulent spots in high-speed boundary layers on a flat plate](/preview/png/656028.png)
چکیده انگلیسی
We investigate the development of isolated turbulent spots in supersonic flat plate boundary layers by direct numerical simulations. The spot structure is analysed and mean velocity profiles and Reynolds stresses are determined by averaging, for one flow parameter set, over an ensemble of simulations. Besides the Mach number also the Reynolds number affects the spot growth. Strong wall cooling leads to elongated turbulent spots. The asymptotic spreading of linear instabilities is investigated and its relation to the spot growth is discussed. The near-field reveals waves propagating away from the spots. Within the boundary layer they appear as distinct semi-circular patterns.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Fluid Flow - Volume 29, Issue 6, December 2008, Pages 1543–1557
Journal: International Journal of Heat and Fluid Flow - Volume 29, Issue 6, December 2008, Pages 1543–1557
نویسندگان
Andreas Jocksch, Leonhard Kleiser,