Rajani, BN and Mittal, Naveen and Govindrajan, Rama (1995) Linear stability analysis of the flow around natural laminar flow airfoils. Technical Report. National Aerospace Laboratories, Bangalore, India.
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Abstract
Linear stability computations over airfoils play an important role in the design of natural laminar flow airfoils - in reducing the risk of a massive separation by the elimination of excess acceleration upstream while maintaining laminar flow; and in the prediction of the onset of transition to turbulence. This report describes a linear stability code developed at CTFD, NAL for airfoil analysis. The code is validated against known results for NASA DESB159 airfoil. Disturbance amplification factors are computed for (i)a Wortmann FX-63-137 airfoil at an angle-of-attack alpha=o deg for Reynolds numbers of 80,000, 0.2 million and 2 million; (ii) a GAW-2 13% airfoil at alpha=0 deg and Reynolds number equal to 60 million. Finally, an en correlation for transition onset is discussed briefly.
| Item Type: | Proj.Doc/Technical Report (Technical Report) |
|---|---|
| Uncontrolled Keywords: | linear stability;amplification ratio;transition;boundary layer;laminar airfoils |
| Subjects: | ENGINEERING > Fluid Mechanics and Thermodynamics |
| Division/Department: | Computational and Theoretical Fluid Dynamics Division, Computational and Theoretical Fluid Dynamics Division, Computational and Theoretical Fluid Dynamics Division |
| Depositing User: | Smt Bhagya Rekha KA |
| Date Deposited: | 28 Jan 2006 |
| Last Modified: | 24 May 2010 09:39 |
| URI: | http://nal-ir.nal.res.in/id/eprint/933 |
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