光谱学与光谱分析 |
|
|
|
|
|
Research on Diagnosis of Gas-Liquid Detonation Exhaust Based on Double Optical Path Absortion Spectroscopy Technique |
Lü Xiao-jing, LI Ning*, WENG Chun-sheng |
National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China |
|
|
Abstract The effect detection of detonation exhaust can provide measurement data for exploring the formation mechanism of detonation, the promotion of detonation efficiency and the reduction of fuel waste. Based on tunable diode laser absorption spectroscopy technique combined with double optical path cross-correlation algorithm, the article raises the diagnosis method to realize the on-line testing of detonation exhaust velocity, temperature and H2O gas concentration. The double optical path testing system is designed and set up for the valveless pulse detonation engine with the diameter of 80 mm. By scanning H2O absorption lines of 1343nm with a high frequency of 50 kHz, the on-line detection of gas-liquid pulse detonation exhaust is realized. The results show that the optical testing system based on tunable diode laser absorption spectroscopy technique can capture the detailed characteristics of pulse detonation exhaust in the transient process of detonation. The duration of single detonation is 85 ms under laboratory conditions, among which supersonic injection time is 5.7 ms and subsonic injection time is 19.3 ms. The valveless pulse detonation engine used can work under frequency of 11 Hz. The velocity of detonation overflowing the detonation tube is 1 172 m·s-1, the maximum temperature of detonation exhaust near the nozzle is 2 412 K. There is a transitory platform in the velocity curve as well as the temperature curve. H2O gas concentration changes between 0~7% during detonation under experimental conditions. The research can provide measurement data for the detonation process diagnosis and analysis, which is of significance to advance the detonation mechanism research and promote the research of pulse detonation engine control technology.
|
Received: 2013-06-04
Accepted: 2013-09-28
|
|
Corresponding Authors:
LI Ning
E-mail: stokim@gmail.com
|
|
[1] CHEN Jing-bin, ZHENG Long-xi, HUANG Xi-qiao(陈景彬, 郑龙席, 黄希桥). Journal of Experiments in Fluid Mechanics(实验流体力学), 2013, 27: 41. [2] LI Chao, ZHENG Long-xi, LI Qing(李 超, 郑龙席, 李 勍). Science Technology and Engineering(科学技术与工程), 2013,13: 2441. [3] LI Qiu-hong, SUN Jian-guo, WANG Qian-yu(李秋红, 孙健国, 王前宇). Control Theory & Applications(控制理论与应用), 2011, 2: 185. [4] Hanson R K. Proceedings of the Combustion Institute, 2011,33: 1. [5] Dolvin D J. 16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference. Bremen. Germany. October 19~22. 2009. [6] Lyle K, Jeffries J B, Hanson R K, et al. 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, Tucson, Arizona, USA, July 10~13, 2005. [7] ZHANG Liang, LIU Jian-guo, KAN Rei-feng, et al(张 亮, 刘建国, 阚瑞峰,等). Acta Physica Sinica(物理学报),2012,61: 034214. [8] XIONG Cha, YAN Chuan-jun, QIU Hua(熊 姹, 严传俊, 邱 华). Advances in Aeronautical Science and Engineering(航空工程进展),2010,1: 262. [9] LI Ning, WENG Chun-sheng(李 宁, 翁春生). Acta Physica Sinica(物理学报),2010,59: 6914. |
[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] |
Lü Xiao-jing, LI Ning*, WENG Chun-sheng . The Diagnostics of Detonation Flow External Field Based on Multispectral Absorption Spectroscopy Technology [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(03): 624-630. |
[4] |
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. |
[5] |
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. |
|
|
|
|