For obtaining and quantitatively evaluating the low temperature flow property of jet fuel,a new apparatus was developed for evaluating low temperature flow property of jet fuels,by simulating fuel crystalliza-tion process in aircraft or other aerial vehicle fuel system at low temperature.The low temperature flow properties of five jet fuels by different processes were studied experimentally using new evaluating apparatus.The study found that,when environment and cold plate temperature was 0～2 oC lower than freezing point of jet fuel,crystal-lization occured near the cold plate wall,and differential pressure from ends of the simulated fuel tank did not necessarily increase significantly after crystallization,the low temperature flow property of jet fuel was compre-hensively affected by the dual effects of low temperature liquid phase flow and fuel crystallization.Then one di-mensionless criterion number,f,was proposed for evaluating low temperature flow property of jet fuel.According to the analysis of the dimensionless number and experimental data,it was shown that with the increase of f,the low temperature flow property of jet fuel became worse,and the dimensionless criterion number f could be used to quantitatively analyze and accurately evaluate low temperature flow property of jet fuels used in this paper from different sources.The expanded uncertainty of f was analyzed to be 4.40%.
Jet fuelLow temperature flow propertyCrystallizationDimensionless criterion numberEvaluation method
NETL
NSTL
万方数据
