Reliability of Measurement Estimation in Altitude Engine Test

엔진 고도 시험의 측정 신뢰성 평가

  • 이진근 (한국항공우주연구원 항공추진그룹) ;
  • 양인영 (한국항공우주연구원 항공추진그룹) ;
  • 양수석 (한국항공우주연구원 항공추진그룹) ;
  • 곽재수 (한국항공대학교 항공우주 및 기계공학부)
  • Published : 2006.09.30

Abstract

The altitude engine test is a sort of engine performance tests carried out to measure the performance of a engine at the simulated altitude and flight speed environments prior to that at the flight test. During the performance test of a engine, various values such as pressures and temperatures at different positions, air flow rate, fuel flow rate, and the load by thrust are measured. These measured values are used to derive the representative performance values such as the net thrust and the specific fuel consumption through a momentum equation. Hence each of the measured values has certain effects on the total uncertainty of the performance values. In this paper, the combined standard uncertainties of the performance variables at the engine test were estimated by the uncertainty analysis of the measurement values and the repeatability and reproducibility of the altitude test measurement were assessed by the analysis of variation on the repeated test data with different operator groups.