Abstract：Heat sink is the characteristic parameter weighing the heat absorption capacity of endothermic hydrocarbon fuels (EHFs). Measuring the heat sink with high efficiency and accuracy is the premise and key technology for the engineering application of EHFs to hypersonic aerocrafts. A high accurate and automated valuing system for heat sink was developed according to the functional modularity design philosophy. On this basis, main uncertainty contributions were analyzed and then the uncertainty of the valuing system for heat sink was evaluated referring to JJF1059 Evaluation and Expression of Uncertainty in Measurement. The results showed that the expanded uncertainty of the valuing system is 2.48% (k=2). The valuing system for heat sink provides a strong support to the metering of the heat absorption capacity of EHFs as well as a basis for the subsequent development of the reference material of heat sink.
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2021, Vol. 42 
