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A first-order green's function approach to supersonic oscillatory flow: a mixed analytic and numeric treatment
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sipcic, S. Tseng, K. Freedman, M. I. |
| Copyright Year | 1985 |
| Description | A frequency domain Green's Function Method for unsteady supersonic potential flow around complex aircraft configurations is presented. The focus is on the supersonic range wherein the linear potential flow assumption is valid. In this range the effects of the nonlinear terms in the unsteady supersonic compressible velocity potential equation are negligible and therefore these terms will be omitted. The Green's function method is employed in order to convert the potential flow differential equation into an integral one. This integral equation is then discretized, through standard finite element technique, to yield a linear algebraic system of equations relating the unknown potential to its prescribed co-normalwash (boundary condition) on the surface of the aircraft. The arbitrary complex aircraft configuration (e.g., finite-thickness wing, wing-body-tail) is discretized into hyperboloidal (twisted quadrilateral) panels. The potential and co-normalwash are assumed to vary linearly within each panel. The long range goal is to develop a comprehensive theory for unsteady supersonic potential aerodynamic which is capable of yielding accurate results even in the low supersonic (i.e., high transonic) range. |
| File Size | 1908532 |
| Page Count | 39 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19850009693 |
| Archival Resource Key | ark:/13960/t3518w62z |
| Language | English |
| Publisher Date | 1985-02-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Supersonic Flow Oscillating Flow Finite Element Method Boundary Value Problems Green's Functions Panel Method Fluid Dynamics Boundary Conditions Aircraft Configurations Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
