| 光谱学与光谱分析 |
|
|
|
|
|
| The Diagnostics of Detonation Flow External Field Based on Multispectral Absorption Spectroscopy Technology |
| Lü Xiao-jing, LI Ning*, WENG Chun-sheng |
| National Key Laboratory of Transient Physics, Nanjing University of Science & Technology, Nanjing 210094, China |
|
|
|
|
Abstract Compared with traditional sampling-based sensing method, absorption spectroscopy technology is well suitable for detonation flow diagnostics, since it can provide with us fast response, nonintrusive, sensitive solution for situ measurements of multiple flow-field parameters. The temperature and concentration test results are the average values along the laser path with traditional absorption spectroscopy technology, while the boundary of detonation flow external field is unknown and it changes all the time during the detonation engine works, traditional absorption spectroscopy technology is no longer suitable for detonation diagnostics. The trend of line strength with temperature varies with different absorption lines. By increasing the number of absorption lines in the test path, more information of the non-uniform flow field can be obtained. In this paper, based on multispectral absorption technology, the reconstructed model of detonation flow external field distribution was established according to the simulation results of space-time conservation element and solution element method, and a diagnostic method of detonation flow external field was given. The model deviation and calculation error of the least squares method adopted were studied by simulation, and the maximum concentration and temperature calculation error was 20.1% and 3.2%, respectively. Four absorption lines of H2O were chosen and detonation flow was scanned at the same time. The detonation external flow testing system was set up for the valveless gas-liquid continuous pulse detonation engine with the diameter of 80 mm. Through scanning H2O absorption lines with a high frequency of 10 kHz, the on-line detection of detonation external flow was realized by direct absorption method combined with time-division multiplexing technology, and the reconstruction of dynamic temperature distribution was realized as well for the first time, both verifying the feasibility of the test method. The test results show that both of th temperature and H2O concentration rose with the arrival of detonation wave. With the increase of the vertical distance between the detonation tube nozzle and the laser path, the time of temperature and concentration coming to the peak delayed, and the temperature variation trend tended to slow down. At 20 cm from detonation tube nozzle, the maximum temperature hit 1 329 K and the maximum H2O concentration of 0.19 occurred at 4 ms after ignition. The research can provide with us the support for expanding the detonation test field with absorption spectroscopy technology, and can also help to promote the detonation mechanism research and to enhance the level of detonation engine control technology.
|
|
Received: 2015-03-03
Accepted: 2015-07-05
|
|
|
|
Corresponding Authors:
LI Ning
E-mail: stokim@gmail.com
|
|
[1] Zangiev A, Ivanov V, Frolov S. Russian Journal of Physical Chemistry B，2013，7: 276.
[2] Hanson R K. Proceedings of the Combustion Institute，2011，33: 1.
[3] Sanders S T, Jeffries A B, Thomas P J, et al. Proceedings of the Combustion Institute，2000，28: 587.
[4] Ma L, Sanders S T, Jeffries J B, et al. Proceedings of the Combustion Institute, 2002, 29: 161.
[5] Klingbeil A E, Jeffries J B，Hanson R K. 2005 41st AIAA Joint Propulsion Conference and Exhibit Tucson, USA, July 10-13, 2005. 3776.
[6] Sanders S T, Thurichengode T M M, Mattison D W, et al. 2001 the 23rd International Symposium) on Shock Waves, Arlington TX, USA, July 23-27, 2001. 5733.
[7] CHEN Fan, TAO Bo, HUANG Bin, et al(陈 帆, 陶 波, 黄 斌, 等). Journal of Combustion Science and Technology(燃烧科学与技术)，2013，19: 501.
[8] Lü Xiao-jing, LI Ning, WENG Chun-sheng(吕晓静, 李 宁, 翁春生). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2014，34(2): 572.
[9] Li H, Farooq A, Jeffries J B, et al. Appl. Phys. B，2007，89：407.
[10] LIU Kai-xin, WANG Jing-tao, WANG Gang, et al(刘凯欣, 王景焘, 王 刚, 等). Advances in Mechanics(力学进展)，2011，4: 447.
[11] SONG Jun-ling, HONG Yan-ji, WANG Guang-yu, et al(宋俊玲, 洪延姬, 王广宇, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2013，33(8): 2047.
[12] Leyen S Chang. Ph. D. Dissertation. Stanford: Stanford University, 2011.
[13] XING Hong-yan, CHENG Yan-yan, XU Wei(行鸿彦, 程艳燕, 徐 伟). Acta Physica Sinica(物理学报), 2012, 61: 100506. |
| [1] |
ZHANG Yu-feng1, WANG Yang1, WU Yuan-qing1, DAI Jing-min2. Study on Metal Grating Structure for Improving Spectral Absorptivity of Infrared Microbolometer[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2020, 40(08): 2647-2650. |
| [2] |
ZHANG Yu-feng1, LI Ming1, DAI Jing-min2, SHAO Zhu-feng1, WU Yuan-qing1. Measuring Method of the Spectral Absorptivity for Solar Selective Absorption Coatings at High Temperature[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(06): 1814-1818. |
| [3] |
LIU Hui-jun1,2, TAO Shao-hua1,2*, YANG Bing-chu1, DENG Hong-gui1 . Gas Concentration Measurement Based on the Integral Value of Absorptance Spectrum[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(12): 3490-3494. |
| [4] |
ZOU Sheng1, ZHANG Hong1, CHEN Yao2, CHEN Xi-yuan1* . Measurement of Mole Ratio for Alkali Metal Mixture by Using Spectral Absorption Method [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(08): 2281-2286. |
| [5] |
Lü Xiao-jing, LI Ning*, WENG Chun-sheng . Research on Diagnosis of Gas-Liquid Detonation Exhaust Based on Double Optical Path Absortion Spectroscopy Technique [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(03): 582-586. |
| [6] |
LOU Nan-zheng, LI Ning*, WENG Chun-sheng. In Situ Temperature Measurement by Absorption Spectroscopy Based on Time Division Multiplexing Technology[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(05): 1329-1333. |
|
|
|
|
