Evaluation of pressure and species concentration measurement using uncertainty propagation

This paper presents a probabilistic uncertainity evaluation method as described in the Guide to Expression of Uncertainty Measurements (GUM) and its application probe measurements on pressure fuel concentration. All sources unceratinties are expressed probability distributions. Consequently, overall standard uncertainty quantity can be calculated using Gaussian error propagation formula. The result yields most probable value measurand describes distribution terms rectangular (standard uncertainty) or gaussian (“expanded” distribution. A pitot-static fuel-concentration stem used order demonstrate principle method. induced by concentration data acquisition system well calibration included analysis. “expanded” uncertainties for measured values presented function different inlet flows. In addition this, individual discussed. Moreover, transformation will provide deviation measurement 95% 99% normal distributed interval instead 67% interval.