Loading...
Please wait, while we are loading the content...
Similar Documents
Base-bleed effect on x-33 aerospike plume induced base-heating environment during power-pack out
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lee, Young-Ching D'Agostino, Mark Williams, Robert Wang, Tee-See Droege, Alan |
| Copyright Year | 2003 |
| Description | A computational heat transfer methodology was developed to study the dual-engine linear aerospike plume induced base-heating environment during one power-pack out, in ascent flight. One power-pack out results in reduction of power levels for both engines. That, in turn, reduces the amount of base-bleed and changes the distribution of base-bleed on the two pillows. Hence, the concern of increased base-heating during power-pack out. The thermo-flowfield of the entire vehicle was computed. The computational methodology for the convective heating is based on a three-dimensional, finite-volume, viscous, chemically reacting, and pressure-based computational fluid dynamics formulation. The computational methodology for the radiative heating is based on a three-dimensional, finite-volume, and spectral-line-based weighted-sum-of-gray-gases absorption computational radiation heat transfer formulation. A separate radiation model was used for diagnostic purposes. The computational methodology was systematically benchmarked. In this study, near-base radiative heat fluxes were computed and they compared well with those measured from an installed linear aerospike engine tests. The base-heating environment of 18 trajectory points selected from three power-pack out ascent scenarios was computed and is presented here. The power-pack out condition has the most impact on convective base-heating when it happens early in flight. The some of its impact comes from the asymmetric and reduced base-bleed. |
| File Size | 2734094 |
| Page Count | 36 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20030060643 |
| Archival Resource Key | ark:/13960/t8wb04g3w |
| Language | English |
| Publisher Date | 2003-01-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Design, Testing And Performance Convective Heat Transfer Computational Fluid Dynamics Base Heating Gray Gas X-33 Reusable Launch Vehicle Flow Distribution Aerospike Engines Finite Volume Method Line Spectra Three Dimensional Models Radiative Heat Transfer Plumes Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
