Temperature and Density Measurements in Free Jets and Shock Waves
Temperature and Density Measurements in Free Jets and Shock Waves
复制标题
自由射流和冲击波中的温度和密度测量
DOI：
10.1063/1.1762146
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发表时间：
1967
影响因子：
4.6
通讯作者：
P. V. Marrone
中科院分区：
文献类型：
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作者：
P. V. Marrone
由17.5 kV电子束探针激发的荧光被用于测量从室温膨胀的超音速氮气射流中的旋转温度和气体密度。参数P0 d（其中P0是托里切利的滞止压力，d是以毫米为单位的孔出口直径）在15至480 Torr-mm之间变化。使用干涉滤光片-光电倍增管组合进行密度测量。在旋转非平衡区，实验密度数据遵循轴向等熵密度分布。从N2+第一负系统的0-0带的转动光谱获得转动温度测量。实验确定的旋转温度，最初遵循轴向等熵温度分布在自由射流中，离开等熵曲线在低温和冻结在一个恒定的值，表明在膨胀的非平衡的相当大的程度。一个震动保持器被插入了喷射器.
The fluorescence stimulated by a 17.5‐kV electron beam probe was used to obtain measurements of rotational temperature and gas density in supersonic nitrogen jets expanding from room temperature. The parameter P0d (where P0 is the stagnation pressure in Torricelli and d is the orifice exit diameter in millimeters) was varied from 15 to 480 Torr‐mm. Density measurements were made using an interference filter‐photomultiplier combination. The experimental density data follow the axial isentropic density distribution in regions of rotational nonequilibrium. Rotational temperature measurements were obtained from rotational spectra of the 0–0 band of the N2+ first negative system. The experimentally determined rotational temperatures, which initially follow the axial isentropic temperature distribution in a free jet, depart from the isentropic curve at low temperatures and freeze at a constant value, indicating a substantial degree of nonequilibrium in the expansion. A shock holder was inserted in the jet and a...