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航空学报  2015 

高焓激波风洞有效试验时间的诊断

DOI: 10.7527/S1000-6893.2015.0014, PP. 3534-3539

Keywords: 高焓激波风洞,有效试验时间,爆轰驱动,静电探针,压力

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Abstract:

高焓激波风洞能够产生模拟高马赫数飞行条件的气流总温,是研究高温真实气体效应以及再入物理问题的有效试验装备,但是激波风洞的试验时间较短,且随着气流焓值的提高大幅降低,仅为几毫秒,因此试验测试数据曲线中有效时间段的分辨十分重要,它直接影响到试验结果的可靠性及精度。鉴于此,采用压力测量、静电探针测量、非接触光学测量和热流测量的方式,针对中国科学院力学研究所JF-10高焓激波风洞16MJ/kg总焓、7700K总温的流场状态,对比研究了风洞喷管的起动时间以及有效测试时间。试验结果表明静电探针测量方法最为有效地分辨了喷管起动时间段、有效试验时间段以及驱动气体的到达;JF-10高焓风洞在16MJ/kg的状态下,喷管起动时间约为1.3ms,风洞有效试验时间约为2ms。

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