Investigation of Differences Between Measured and Predicted Pressures in AEDC/VKF Hypersonic Tunnel B
Abstract
A study has been carried out to assess the effect of flow nonuniformities in AEDC Tunnel B on surface pressures of slender bodies. The approach taken was to use flow profiles measured in a recent calibration program as inflow boundary conditions for a CFD solution to compare with the idealized case where a uniform free stream is assumed. The results of this study indicate that flow nonuniformities are at least partially responsible for discrepancies observed at low Reynolds number (Re/L = 1.0 x 10(exp 6)/ft) on slender axisymmetric bodies at zero angle of attack. There is no corresponding effect at high tunnel Reynolds number (Re/L = 3.5 x 10(exp 6)/ft). At high Reynolds number, for angles of attack that displace the nose of the vehicle more that 6-7 in. from the tunnel centerline, there is a small increase in surface pressure caused by a radial variation in Mach number.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1997
- Accession Number
- ADA345792
Entities
People
- James R. Maus