FORCE/HEAT FLUX MEASUREMENTS IN THE JAXA 1.27 m HYPERSONIC WIND-TUNNEL FOR HB-2 TYPE BALLISTIC MODEL: A SUMMARY

摘要

This report presents a description and results of force and heat flux measurement tests conducted in the JAXA 1.27 m Hypersonic Wind Tunnel. The HB-2 standard hypersonic ballistic configuration was employed as a model. The force-measuring tests used a stainless steel model on a six-component balance, and the heat flux measurement tests were made using a chromel model with a total of 28 coaxial thermocouples press-fitted onto the surface. A non-intrusive heat flux measurement was also made by infrared (IR) ther-mography. For both force and heat tests, good data repeatability was confirmed. The heat transfer coefficient obtained from the IR thermography agreed well with that from the thermocouple measurement. Also performed was the analysis to determine measurement uncertainty both for force and heat tests. A conventional statistical approach which estimates the bias and random error components was applied to the force test data, while a Monte Carlo approach was used to numerically estimate the uncertainty in the data reduction process for the heat flux data. The present experiment was conducted as a series of comparison tests between two hypersonic facilities in JAXA and the data are also expected to serve as a database for the validation of hypersonic CFD codes.