The reliability of the improved e N method for the transition prediction of boundary layers on a flat plate
Abstract
The transition criterion in the improved e N method is that transition would occur whenever the velocity amplitude of disturbance reaches 1%-2% of the free stream velocity, while in the conventional e N method, the N factor is an empirical factor. In this paper the reliability of this key assumption in the improved e N method is checked by results of transition prediction by using the Parabolized Stability Equations (PSE). Transition locations of an incompressible boundary layer and a hypersonic boundary layer at Mach number 6 on a flat plate are predicted by both the improved e N method and the PSE method. Results from both methods agree fairly well with each other, implying that the transition criterion proposed in the improved e N method is reliable.
- Publication:
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Science China Physics, Mechanics, and Astronomy
- Pub Date:
- May 2012
- DOI:
- 10.1007/s11433-012-4692-y
- Bibcode:
- 2012SCPMA..55..837S