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Computational aeroelastic analysis of ares crew launch vehicle bi-modal loading
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Chwalowski, Pawel Massey, Steven J. |
| Copyright Year | 2010 |
| Description | A Reynolds averaged Navier-Stokes analysis, with and without dynamic aeroelastic effects, is presented for the Ares I-X launch vehicle at transonic Mach numbers and flight Reynolds numbers for two grid resolutions and two angles of attack. The purpose of the study is to quantify the force and moment increment imparted by the sudden transition from fully separated flow around the crew module - service module junction to that of the bi-modal flow state in which only part of the flow reattaches. The bi-modal flow phenomenon is of interest to the guidance, navigation and control community because it causes a discontinuous jump in forces and moments. Computations with a rigid structure at zero zero angle of attack indicate significant increases in normal force and pitching moment. Dynamic aeroelastic computations indicate the bi-modal flow state is insensitive to vehicle flexibility due to the resulting deflections imparting only very small changes in local angle of attack. At an angle of attack of 2.5deg, the magnitude of the pitching moment increment resulting from the bi-modal state nearly triples, while occurring at a slightly lower Mach number. Significant grid induced variations between the solutions indicate that further grid refinement is warranted. |
| File Size | 18992081 |
| Page Count | 27 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20100025029 |
| Archival Resource Key | ark:/13960/t0zp9149b |
| Language | English |
| Publisher Date | 2010-06-28 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Spacecraft Modules Pitching Moments Deflection Guidance Motion Reynolds Averaging Ares 1 Launch Vehicle Transonic Speed Angle of Attack Aeroelasticity Separated Flow Flexibility Mach Number Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
