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含能材料  2013 

定容燃烧器法热损失率不确定度分析

DOI: 10.3969/j.issn.1006-9941.2013.01.021

Keywords: 物理化学,高压燃速,定容燃烧器法,热损失率,测量不确定度,燃面

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Abstract:

定容燃烧器法是一种测试高压下固体推进剂燃速特性的方法。定容燃烧器法工作过程中散热损失是影响燃速测试精度的主要因素。推导了热损失率计算方程,分析了各因素对热损失率的影响;建立了热损失率测试结果的不确定度评定方法,并对测试结果进行了不确定度评定。研究表明,推进剂试样燃面、燃气定容比热、燃气压强、燃气温度是影响热损失率不确定度的主要因素,其中燃面是影响热损失率不确定度的最大因素;后续实验中必须提高推进剂试样尺寸加工精度,减小推进剂试样燃面误差。

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