Subsonic Choked Flow LDV Calibrator/Velocity Standard Development
Abstract
In an LDV entry in the AEDC 1-Ft Transonic Wind Tunnel where harsh environmental conditions exist; e.g., high temperature, vibration, etc., an asymptotic drift in measured flow velocity of a few percent was noticed following startup each day. To resolve the issue of whether the tunnel or the LDV was responsible and to aid in the correction of the problem, a device was developed which produces invariant particle velocities for use as a velocity standard in the tunnel environment. The development of such a device is herein discussed. The analysis demonstrates the device to be satisfactory for resolution of the "startup drift" problem and, with some additional development, could be used in checkout and calibration of an LDV.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1985
- Accession Number
- ADA539257
Entities
People
- Peter M. Sherrouse