超燃冲压发动机性能参数测量不确定度分析

Based on wind tunnel test uncertainty assessment of AIAA S-071A-1999 and the uncertainty study for the wind tunnel testing,aeroengine performance testing and rocket ground testing in the international space power community,an uncertainty analysis method for the scramjet performance testing was established,and corresponding analysis was given.Results showed that the uncertainty induced by the free-jet testing measurement was predominant in evaluating the overall scramjet performance,and the bias limit was over 90% in the uncertainty of scramjet performance parameters measurements.In conclusion,some valuable results and suggestions about the uncertainty of overall performance of scramjet were obtained,and these results can improve the accuracy in scramjet performance parameters measurements,showing prominent application prospect in scramjet development.