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Use of navier-stokes methods for the calculation of high-speed nozzle flow fields
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Georgiadis, Nicholas J. Yoder, Dennis A. |
| Copyright Year | 1994 |
| Description | Flows through three reference nozzles have been calculated to determine the capabilities and limitations of the widely used Navier-Stokes solver, PARC. The nozzles examined have similar dominant flow characteristics as those considered for supersonic transport programs. Flows from an inverted velocity profile (IVP) nozzle, an under expanded nozzle, and an ejector nozzle were examined. PARC calculations were obtained with its standard algebraic turbulence model, Thomas, and the two-equation turbulence model, Chien k-epsilon. The Thomas model was run with the default coefficient of mixing set at both 0.09 and a larger value of 0.13 to improve the mixing prediction. Calculations using the default value substantially underpredicted the mixing for all three flows. The calculations obtained with the higher mixing coefficient better predicted mixing in the IVP and underexpanded nozzle flows but adversely affected PARC's convergence characteristics for the IVP nozzle case. The ejector nozzle case did not converge with the Thomas model and the higher mixing coefficient. The Chien k-epsilon results were in better agreement with the experimental data overall than were those of the Thomas run with the default mixing coefficient, but the default boundary conditions for k and epsilon underestimated the levels of mixing near the nozzle exits. |
| File Size | 13294425 |
| Page Count | 20 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19940028478 |
| Archival Resource Key | ark:/13960/t6q004h3s |
| Language | English |
| Publisher Date | 1994-06-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Navier-stokes Equation Nozzle Flow Computational Fluid Dynamics Jet Aircraft Noise Turbulence Models Flow Distribution Flow Velocity Boundary Conditions Velocity Distribution Supersonic Transports Turbulent Mixing Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
