Linear stability analysis of the flow around natural laminar flow airfoils

Rajani, BN and Mittal, Naveen and Govindarajan, Rama (1995) Linear stability analysis of the flow around natural laminar flow airfoils. Technical Report. National Aerospace Laboratories, Bangalore, India.

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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: Monograph (Technical Report)
Uncontrolled Keywords: linear stability;amplification ratio;transition;boundary layer;laminar airfoils
Subjects: ENGINEERING > Fluid Mechanics and Thermodynamics
Depositing User: Smt Bhagya Rekha KA
Date Deposited: 28 Jan 2006
Last Modified: 11 Aug 2015 06:45

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