A Study of Expected Data Precision in the Proposed AEDC HIRT Facility.

摘要

AEDC has proposed an 8 x 10 foot Transonic Wind Tunnel (HIRT) operating on a Ludwieg tube concept. This facility is designed to meet the need to properly simulate the full-scale Reynolds numbers of current and future aircraft. HIRT differs from conventional wind tunnels in the characteristics of short run duration, high operating pressures, low temperatures and high aerodynamic loads. The purpose of this study was to assess the precision of the test data expected from HIRT and to examine HIRT to determine if its mode of operation would adversely affect data precision. It was assumed that the precision of the drag measurement could be used as the yardstick for evaluating over-all precision of facility test data. To establish a baseline from which the predicted precision of model gleaned in HIRT could be compared, a transonic tunnel data accuracy questionnaire was completed by five leading domestic transonic facilities. The responses to this questionnaire are summarized in this report.