کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
789604 1466611 2013 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of aerodynamic asymmetries on turbomachinery flutter
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
The effect of aerodynamic asymmetries on turbomachinery flutter
چکیده انگلیسی

In this paper, the effect of aerodynamic asymmetries on the flutter characteristics of turbomachinery blades is investigated. Specifically, the present method is used to study the effect of leading edge blending in loaded and unloaded rotors. The unsteady aerodynamic response of the blades to self-excited vibrations is modeled using a harmonic balance method, which allows one to model the entire wheel using complex periodic boundary conditions and a computational grid spanning a single sector (symmetry group). This reduces the computational and memory requirements dramatically compared to similar time-accurate analyses. It is shown that alternate blending degrades the stability of a loaded rotor whereas it improves the stability of an unloaded rotor. On the other hand, when blends are spaced five blades apart their effect is less pronounced.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluids and Structures - Volume 36, January 2013, Pages 1–17
نویسندگان
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