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Effect of reynolds number variation on aerodynamics of a hydrogen-fueled transport concept at mach 6
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Marcum Jr., Don C. Penland, Jim A. |
| Copyright Year | 1987 |
| Description | Two separate tests have been made on the same blended wing-body hydrogen-fueled transport model at a Mach number of about 6 and a range of Reynolds number (based on theoretical body length) of 1.577 to 55.36 X 10 to the 6th power. The results of these tests, made in a conventional hypersonic blowdown tunnel and a hypersonic shock tunnel, are presented through a range of angle of attack from -1 to 8 deg, with an extended study at a constant angle of attack of 3 deg. The model boundary layer flow appeared to be predominately turbulent except for the low Reynolds number shock tunnel tests. Model wall temperatures varied considerably; the blowdown tunnel varied from about 255 F to 340 F, whereas the shock tunnel had a constant 70 F model wall temperature. The experimental normal-force coefficients were essentially independent of Reynolds number. A current theoretical computer program was used to study the effect of Reynolds number. Theoretical predictions of normal-force coefficients were good, particularly at anticipated cruise angles of attack, that is 2 to 5 deg. Axial-force coefficients were generally underestimated for the turbulent skin friction conditions, and pitching-moment coefficients could not be predicted reliably. |
| File Size | 1434777 |
| Page Count | 28 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19870016598 |
| Archival Resource Key | ark:/13960/t5w71c04h |
| Language | English |
| Publisher Date | 1987-08-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Pitching Moments Hydrogen Fuels Turbulence Skin Friction Transport Aircraft Reynolds Number Blowdown Wind Tunnels Hypersonic Wind Tunnels Wall Temperature Aerodynamic Configurations Angle of Attack Hypersonic Aircraft Mach Number Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
