Control of two-dimensional turbulent wall jet on a coanda surface |
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| Authors: | Frunzulica Florin Dumitrache Alexandru Preotu Octavian Dumitrescu Horia |
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| Institution: | 1. POLITEHNICA University of Bucharest, Faculty of Aerospace Engineering, Polizu 1-6, 011061, Bucharest, Romania;2. Institute of Statistics and Applied Mathematics, 13 Septembrie 13, sect.5, 050711 Bucharest, Romania;3. University of Craiova, Avionics Department, B-dul Decebal 107, 1100 Craiova, Romania |
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| Abstract: | The Coanda effect that is the tendency of a fluid jet to stay attached to an adjacent curved surface that is very well shaped has been employed to improve the performance of various devices. The main objective of this paper is to investigate ways of keeping the flow attached to a larger length of a Coanda surface. There are considered two possibilities: one passive, which uses a slot that connects the low pressure and high pressure points on the Coanda surface and an active one, based on the principle of synthetic jet, created through an orifice located near the point of detachment of the jet. Reynolds averaged Navier-Stokes simulations (RANS) with shear stress transport k-ω (SST model) of Menter have been used to compute the two-dimensional turbulent wall jet. The numerical results are presented for the two methods considered. (© 2011 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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