Performance of Corrugated Limiting Tab in Presence of Sharp Corners
the author of the article can submit here a request for assignment of a DOI number to this resource!
Cost of the service: euros 10,00 (for a DOI)
The mixing promoting efficiency of a corrugated limiting tab placed at the exit of a Mach 1.86 square jet has been investigated experimentally. Mixing performance of tab having semicircular corrugations, at both the edges along its length and having 5% blockage, is compared with an identical tab of the same blockage without corrugations, at different levels of adverse pressure gradients beginning from 36.5% (NPR 4) to about 4.75% (NPR 6). It is found that, as high as 98.98% reduction of core length can be achieved with the semicircular corrugated tab, at NPR 5. This is considerably higher than the core length reduction of 68.31%, caused by the uncorrugated tab at NPR 5. Also, the mixing performance of semicircular corrugated tab is found to be independent of the level of overexpansion at the nozzle exit. The profile plots for the semicircular corrugated tab shows improvement in the jet symmetry in the direction along the tab and large jet spread is caused in the direction normal to the tab. The shadowgraph pictures for the uncontrolled and controlled jets clearly demonstrate the effectiveness of corrugated tabs in weakening the waves in the jet core
Copyright © 2014 Praise Worthy Prize - All rights reserved.
Bradbury. L.J.S, and Khadem. A.H.(1975), The Distortion of a Jet by Tabs, Journal of Fluid Mechanics, Vol. 70, pp.801-813.
Ahuja. K.K, and Brown. W.H.(1989), Shear Flow Control by Mechanical Tabs, AIAA Paper 89-0994
Zaman. K.B.M.Q.(1993), Streamwise Vorticity Generation and Mixing Enhancement in Free Jets by Delta-Tabs, AIAA Paper 93-3253.
Zaman. K.B.M.Q, Reeder. M.F, and Samimy. M.(1994), Control of an Axisymmetric Jet Using Vortex Generators, Physics of Fluids, Vol. 6, pp. 778-793.
Bohl D. and Foss J.F.(1996), Enhancement of Passive Mixing Tabs by the Addition of Secondary Tabs, AIAA Paper 96-054.
Rathakrishnan. E. (2009), Experimental Studies on the Limiting Tab, AIAA Journal, Vol. 47, No. 10, pp. 2475-2485
B.Chiranjeevi Phanindra and Rathakrishnan. E. (2010), Corrugated Tabs for Supersonic Jet Control, AIAA Journal, Vol. 48, No. 2, pp. 453-465
Rathakrishnan. E. (2010), Applied Gas Dynamics, John Wiley and Sons (Asia) Pte Ltd.
Lovaraju. P, Paparao. K.P.V, and Rathakrishnan. E. (2004) ,Shifted Cross- Wire for Supersonic Jet Control, AIAA Paper 2004-4080.
Rathakrishnan. E. (2007), Instrumentation, Measurements, and Experiments in Fluids, CRC Press, Boca Raton, FL, USA
Winant C.D. and Browand F.K.(1974), Vortex Pairing: The Mechanism of Turbulent Mixing Layer Growth at Moderate Reynolds Numbers, Journal of Fluid Mechanics, Vol. 63, No. 2, pp. 237-255
Navinkumar. S, and Rathakrishnan. E. (2002), Sonic Jet Control with Tabs, Journal of Turbo and Jet Engines, Vol. 19, pp. 107-118.
Wishart. D.P, Krothapalli. A, and Mungal. M.G. (1993), Supersonic Jet Control Disturbances inside the Nozzle, AIAA Journal, Vol. 31, No. 7, pp. 1340-1341.
Srinivasan. K. (1999), Flow and Noise Characteristics of Non-Circular Jets, Ph.D Thesis, High Speed Aerodynamics Lab, Indian Institute of Technology Kanpur.
Quinn. W.R. (1992), Streamwise Evolution of a Square Jet Cross Section, AIAA Journal, Vol. 30, No. 12, pp. 2852-2857
Wang. X.K., Chua. L.P, Yu. S.C.M. (2003), On the near-field of a square jet with vortex-generating tabs, Fluid Dynamics Research, Vol. 32, pp. 99-117
Rathakrishnan. E. (2008), Waves in Correctly Expanded Supersonic Jets, International Review of Aerospace Engineering (IREASE), Vol. 1, No. 6, pp. 536-538.
Tam, C. K. W. (1995), Supersonic Jet Noise, Annual Review of Fluid, Mechanics, Vol. 27, pp. 1743.
- There are currently no refbacks.
Please send any question about this web site to firstname.lastname@example.org
Copyright © 2005-2019 Praise Worthy Prize