强激波阵面的非平衡结构研究
Research of nonequilibrium structure of strong shock front
查看参考文献10篇
|
文摘
|
利用测量强激波波后N2+第一负系(0,0)带和(1,2)带的辐射,对强激波后振动温度历程的测量过程进行了探索,并利用Langmuir探针技术,在低密度激波管中对强激波后电子数密度历程进行了测量.测量和计算结果进行了对比.结果表明:N2+B2∑u+态的激发比振动能的激发更快;实验测得的振动温度有明显的周期性振荡;在激波速度7.65～7.85km/s、p1=1.33Pa、实验段内径0.8m下,实验有效时间只有约6.5μs,实验中的电子数密度不能达到峰值.在约10倍波前自由程的实验有效区域内,电子数密度的测量值与计算值吻合很好. |
|
其他语种文摘
|
The vibrational temperature and electron number density behind strong shock waves were measured in shock tubes, and the results were compared with those of theoretical calculation. The vibrational temperature was derived by measuring the radiation of (0,0) and (1,2) bands of N2+ first negative system. According to the experimental results, the electronic energy of N2+ can be excited faster than its vibrational energy , and there are periodic fluctuations in the measured vibrational temperature. In the measurement of electron number densitiy behind strong shock waves (pi = 1.33Pa, V, = 7.65 ~ 7.85km/s) in a low density shock tube (3>0.8m) , the effective test time was only about 6.5/us, so the electron number densitiy could not reach the peak in such a short time. The agreement between measurement and calculation are good during the effective test region, which is about 10 times freestrearn mean-free-molecular path. |
|
来源
|
实验流体力学
,2006,20(2):36-40,49 【核心库】
|
|
关键词
|
强激波
;
激波管实验
;
振动温度
;
电子数密度
|
|
地址
|
1.
中国空气动力研究与发展中心, 四川, 绵阳, 621000
2.
中国科学院力学研究所, 北京, 100080
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1672-9897 |
|
学科
|
力学;物理学 |
|
基金
|
国家自然科学基金资助项目
|
|
文献收藏号
|
CSCD:2348479
|
参考文献 共
10
共1页
|
|
1.
ALLEN R A. Nonequilibrium shock front rotational.
NASA CR-205(also AVCO RR-186),1964
|
被引
1
次
|
|
|
|
|
2.
PARK C. Nonequilibrium hypersonic aerothermodynamics[M].
Nonequilibrium hypersonic aerothermodynamics,1990
|
被引
25
次
|
|
|
|
|
3.
SHARMA S P. Nonequilibrium and equilibrium shock front radiation measurements[R].
AIAA 90-0139,1990
|
被引
1
次
|
|
|
|
|
4.
LIN S C. Rate of ionization behind shock waves in air.
Physice of Fluids,1962,5(12):1633
|
被引
1
次
|
|
|
|
|
5.
LIN S C. Rate of ionization behind shock waves in air.
Physice of Fluids,1963,6(10):355
|
被引
2
次
|
|
|
|
|
6.
WILSON J F. Ionization rate of air behind high speed shock waves[J].
Physice of Fluids,1966,9(10):1913
|
被引
1
次
|
|
|
|
|
7.
PARK C. Review of chemical-kinetic problems of future NASA missions.
J Thermophysics and Heat Transfer,1993,7(3):383
|
被引
2
次
|
|
|
|
|
8.
张若凌. 高超声速非平衡流动的计算和实验研究[D].
高超声速非平衡流动的计算和实验研究[博士学位论文],2004
|
被引
2
次
|
|
|
|
|
9.
GAYDON A G. The shock tube in high-temperature chemical physics[M].
The shock tube in high-temperature chemical physics,1963
|
被引
4
次
|
|
|
|
|
10.
SONIN AIN A. Free-molecule Langmuir probe and its use in flowfield studies[J].
AIAA J,1966,4(9):1588
|
被引
2
次
|
|
|
|
|
了解气象卫星更多信息，请访问