A-23 舶用過給機の性能計測試験と「計測の不確かさ(ISOによる)」(材料・計測,一般講演)

概要

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In recent years, followed by the enhancing powers and low specific fuel consumptions of marine diesel engines, turbochargers are also required to provide higher efficiencies and higher pressure ratios. Therefore, the performance measurement test of marine turbochargers is one of the most important processes for the improvement of the present model and for the new model development. For the performance measurement tests of a marine turbocharger, the quantity such as efficiency which can't be measured directly should be calculated by measuring the quantity of states such as pressure, temperature, mass flow rates and others. The true values won't be obtained when the values of atmospheric pressure, temperature, humidity and others have dispersion. Therefore, it is necessary to consider these influences on the analyses of the measured data. In this paper, to clarify the uncertainties of the performance measurement for a marine turbocharger, performance values were calculated from quantities of state parameters of some turbochargers, and then the calculated results were critically compared with uncertainty effects.
2004-10-01