کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10416185 898311 2005 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nonlinear resonant oscillations and shock waves generated between two coaxial cylinders
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Nonlinear resonant oscillations and shock waves generated between two coaxial cylinders
چکیده انگلیسی
Nonlinear evolution of a gas oscillation of large amplitude generated between two coaxial cylinders is numerically studied by solving the Euler equations for an inviscid ideal gas. The resonant oscillation is excited uniformly along the axis by harmonic oscillation of the radius of the outer cylinder with the fundamental resonance frequency. Nonlinear and geometrical effects are investigated by varying two nondimensional parameters, i.e., the acoustic Mach number M at the surface of the outer cylinder and the ratio α of the radius of the inner cylinder to that of the outer cylinder. The result shows that no shock wave is formed if M is smaller than a critical value for a given α, and then the amplitude of the oscillation reaches O(M1/3). In this case the amplitude of gas oscillation is modulated periodically with a period of O(M-2/3). When α is small (α≈0.1) and M is larger than the critical value, the waveform including a shock wave is quite different from that in plane wave resonance because of the geometrical effect. Furthermore, the soaring of temperature takes place in the vicinity of the inner cylinder owing to the shock heating.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fluid Dynamics Research - Volume 36, Issue 1, January 2005, Pages 45-60
نویسندگان
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