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Sensitivity of lfc techniques in the non-linear regime
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hussaini, M. Y. Bushnell, Dennis M. Zang, Tom A. |
| Copyright Year | 1987 |
| Description | For all the Laminar Flow Control (LFC) techniques examined, finite-amplitude effects are destabilizing, i.e., finite-amplitude 2-D Tollmien-Schlichting (TS) waves grow faster than predicted by linear theory. It was also found, in direct contrast to the results from linear theory for low-amplitude waves, that temperature fluctuations exert a further destabilizing influence on finite amplitude 2-D TS waves. The controlled boundary layers are, of course, subject to intense 3-D secondary instabilities. The instantaneous growth rates of both the fundamental and subharmonic instabilities are strongly tied to the amplitude of the primary 2-D wave. The principal finite-amplitude effects upon the 3-D secondary instabilities occur through the faster growth of the 2-D waves. |
| File Size | 1095806 |
| Page Count | 26 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19900003217 |
| Archival Resource Key | ark:/13960/t05x76w0f |
| Language | English |
| Publisher Date | 1987-12-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Suction Computational Fluid Dynamics Incompressible Boundary Layer Boundary Layer Control Navier-stokes Equation Laminar Boundary Layer Heating Finite Difference Theory Flow Distribution Tollmien-schlichting Waves Nonlinearity Parallel Flow Boundary Layer Transition Boundary Layer Stability Boundary Layer Equations Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
