کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8058716 1520087 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An improved micro-vortex generator in supersonic flows
ترجمه فارسی عنوان
یک ژنراتور میکرو گردشی در جریانهای بادی صوتی پیشرفته
کلمات کلیدی
رمپ میکرو، تعامل لایه مرزی شوک، کنترل منفعل،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی هوافضا
چکیده انگلیسی
The micro-vortex generator has currently received much attention as a passive flow control device in supersonic flow. This paper investigates the induced velocity and the trajectory of the vortices generated by micro-vortex generators by using the point vortex model. The analysis suggests that counter-rotating vortices could adversely affect each other and this effect depends on the distance of the counter-rotating vortices. A novel micro-ramp for boundary layer control, called dissymmetric micro-ramp, was put forward on the basis of this analysis. The effect the dissymmetric micro-ramp was numerically studied at a free stream Mach number of 2.5 via RANS simulations. The vortices generated by these devices have similar path and dissipation with the ones generated by traditional devices. There is a constant drop of vorticity in the development and dissipation of these vortices. The vorticity in dissymmetric micro-ramps is stronger than that in standard micro-ramp. On the other hand, the vortex height from wall in dissymmetric micro-ramps is smaller than in standard micro-ramp. This effect also suggests that vortex in dissymmetric micro-ramp is apt to maintain in boundary layer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aerospace Science and Technology - Volume 47, December 2015, Pages 210-215
نویسندگان
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