Vibrational and rotational temperature measurements in a shock tube
Vibrational and rotational temperature measurements in a shock tube
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激波管中的振动和旋转温度测量
DOI：
10.1007/978-3-642-77648-9_107
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
S. Sharma
中科院分区：
文献类型：
--
作者：
S. Sharma
利用电弧驱动激波管中N_2~+(1-)和N_2(2+)能带系统的发射光谱，测量了正常激波后氮气的振动和转动温度，激波速度为6.2公里/秒。这一结果与AVCO-Everett研究实验室在20世纪60年代获得的类似数据进行了比较。实验得到的平衡区的振动和转动温度与AVCO的结果一致，但非平衡区的振动和转动温度与AVCO的结果有很大的不同。测量的旋转温度与平移温度似乎是不平衡的，这与CFD中广泛使用的双温度模型相矛盾。此外，N_2~+和N_2分子的驰豫速率似乎是相同的数量级。
Vibrational and rotational temperatures in nitrogen test gas relaxing behind a normal shock are measured using the emission spectra of N2+(1-) and N2(2+) band systems in an electric-arc driven shock tube, at a shock velocity of 6.2 km/sec. The results are compared with similar data obtained by AVCO-Everett Research Laboratory during the 1960s. The vibrational and rotational temperatures in the equilibrium region obtained in the present experiment agreed with those of AVCO, but those in the nonequilibrium region are greatly different fron the AVCO results. The measured rotational temperature seems to be in nonequilibrium with the translational temperature, contradicting the two-temperature model widely used in CFD. Also, the relaxation rates for both N2+and N2molecules seem to be of the same order.