Abstract
An optical probe was developed for in situ laser absorption spectroscopy measurements of target species concentration and temperature near a shock tube endwall. The optical components of a single-ended sensor, including two sapphire rods with a separation of 2.8 cm (effective optical path length), were coupled with a custom-machined shock tube end cap. This hardware design—complemented by a scanned wavelength direct absorption (scanned DA) optical sensing scheme, targeting CO2—enabled minimally invasive, sensitive and spatially resolved measurement of CO2 along the shock tube axis in the reflected shock region. Scanned direct absorption of two adjacent, discrete, rovibrational features in the ν3 fundamental band of CO2 near 4.2 µm, with a single interband cascade laser, allowed measurement of temperature from the ratio of integrated absorbances. Several tests were conducted to validate the accuracy of the sensor and confirm that shock conditions were unperturbed by the probe. The probe-measured temperature and CO2 mol fraction in the reflected shock region, accurate within ~ 1 and ~ 5%, respectively, at a rate of 20 kHz, in shocks with 1–7% carbon dioxide diluted in argon or nitrogen and at temperatures of 1200–2000 K and pressures of 0.7–1.2 bar. Agreement with multiple metrics for validation was confirmed. No evidence of perturbed shock conditions was found.
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References
A. G. Gaydon, I. R. Hurle: The Shock Tube in High-Temperature Chemical Physics (Reinhold, 1963)
R.K. Hanson, D.F. Davidson, Recent advances in laser absorption and shock tube methods for studies of combustion chemistry. Prog. Energy Comb. Sci. 44, 103–114 (2014)
R.K. Hanson, Applications of quantitative laser sensors to kinetics, propulsion and practical energy systems. Proc. Combust. Inst. 33, 1–40 (2011)
R.K. Hanson, R.M. Spearrin, C.S. Goldenstein, Spectroscopy and Optical Diagnostics for Gases (Springer, Berlin, 2016)
C.S. Goldenstein, R.M. Spearrin, J.B. Jeffries, R.K. Hanson, Infrared laser absorption sensing for combustion flows (Prog. Energy Combust., Sci, 2016)
J.W. Hargis, E.L. Petersen, Shock-tube boundary-layer effects on reflected-shock conditions with and without CO2. AIAA J. 55(3), 902–912 (2017)
M. Ihme, Y. Sun, R. Deiterding: Detailed simulations of shock-bifurcation and ignition of an argon-diluted hydrogen/oxygen mixture in a shock tube. AIAA Paper, (January), AIAA-2013-0538 (2013)
E.L. Petersen, R.K. Hanson, Nonideal effects behind reflected shock waves in a high-pressure shock tube. Shock Waves 10, 405–420 (2001)
V.A. Troutman, C.L. Strand, M.F. Campbell, A.M. Tulgestke, V.A. Miller, D.F. Davidson, R.K. Hanson, High-speed OH* chemiluminescence imaging of ignition through a shock tube end-wall. Appl. Phys. B: Lasers Opt. 122(3), 1–7 (2016)
M.F. Campbell, S. Wang, C.S. Goldenstein, R.M. Spearrin, A.M. Tulgestke, L. Zaczek, R.K. Hanson, Constrained reaction volume shock tube study of n-heptane oxidation: ignition delay times and time-histories of multiple species and temperature. Proc. Combust. Inst. 35(1), 231–239 (2015)
J.J. Girard, R.M. Spearrin, C.S. Goldenstein, R.K. Hanson, Compact optical probe for flame temperature and carbon dioxide using interband cascade laser absorption near 4.2 um. Combust. Flame 178, 158–167 (2017)
L.S. Rothman et al., The HITRAN2012 molecular spectroscopic database. J. Quant. Spectrosc. Radiat. Transf 130, 4–50 (2013)
M.F. Campbell, T. Parise, A.M. Tulgestke, R.M. Spearrin, D.F. Davidson, R.K. Hanson, Strategies for obtaining long constant-pressure test times in shock tubes. Shock Waves 25(6), 651–665 (2015)
R. M. Spearrin, W. Ren, J. B. Jeffries, R. K. Hanson: Multi-band infrared CO2 absorption sensor for sensitive temperature and species measurements in high-temperature gases. Appl. Phys. B 116, 855–865 (2014)
C.S. Goldenstein, R.M. Spearrin, J.B. Jeffries, R.K. Hanson, Infrared laser-absorption sensing for combustion gases, vol. 60 (Pergamon, 2017), pp. 132–176
K. Sun, R. Sur, X. Chao, J.B. Jeffries, R.K. Hanson, R.J. Pummill, K.J. Whitty, TDL absorption sensors for gas temperature and concentrations in a high-pressure entrained-flow coal gasifier. Proc. Combust. Inst. 34, 3593–3601 (2013)
M.E. Webber, R. Claps, F.V. Englich, F.K. Tittel, J.B. Jeffries, R.K. Hanson, Measurements of NH3 and CO2 with distributed-feedback diode lasers near 2.0 μm in bioreactor vent gases. Appl. Opt. 40, 4395 (2001)
R. Sur, K. Sun, J. B. Jeffries, R. K. Hanson: Multi-species laser absorption sensors for in situ monitoring of syngas composition. Appl. Phys. B 115, 9–24 (2013)
A. Farooq, J.B. Jeffries, R.K. Hanson, CO2 concentration and temperature sensor for combustion gases using diode-laser absorption near 2.7 μm. Appl. Phys. B 90, 619–628 (2008)
W. Ren, J.B. Jeffries, R.K. Hanson, Temperature sensing in shock-heated evaporating aerosol using wavelength-modulation absorption spectroscopy of CO2 near 2.7 µm. Meas. Sci. Technol. 21, 105603 (2010)
R.M. Spearrin, C.S. Goldenstein, J.B. Jeffries, R.K. Hanson, Fiber-coupled 2.7 µm laser absorption sensor for CO2 in harsh combustion environments. Meas. Sci. Technol. 24, 55107 (2013)
C.S. Goldenstein, R.M. Spearrin, J.B. Jeffries, R.K. Hanson, Infrared laser absorption sensors for multiple performance parameters in a detonation combustor. Proc. Combust. Inst. 35, 3739–3747 (2015)
R.M. Spearrin, C.S. Goldenstein, I.A. Schultz, J.B. Jeffries, R.K. Hanson, Simultaneous sensing of temperature, CO, and CO2 in a scramjet combustor using quantum cascade laser absorption spectroscopy. Appl. Phys. B 117, 689–698 (2014)
W. Ren, R.M. Spearrin, D.F. Davidson, R.K. Hanson, Experimental and modeling study of the thermal decomposition of C3-C5 ethyl esters behind reflected shock waves. J. Phys. Chem. A 118, 1785–1798 (2014)
W.Y. Peng, C.S. Goldenstein, R.M. Spearrin, J.B. Jeffries, R.K. Hanson, Single-ended mid-infrared laser-absorption sensor for simultaneous in situ measurements of H2O, CO2, CO, and temperature in combustion flows. Appl. Opt. 55, 9347–9359 (2016)
M.E. Thomas, R. Joseph, W.J. Tropf, Infrared transmission properties of sapphire, spinel, yttria, and ALON as a function of temperature and frequency. Appl. Opt. 27, 239–245 (1988)
L.H. Ma, L.Y. Lau, W. Ren, Non-uniform temperature and species concentration measurements in a laminar flame using multi-band infrared absorption spectroscopy. Appl. Phys. B: Lasers Opt. 123(3), 1–9 (2017)
G. Kamimoto, H. Matsui, Vibrational relaxation of carbon dioxide in argon. J. Chem. Phys. 53(10), 3990–3993 (1970)
R.L. Taylor, S. Bitterman, Experimental measurements of the resonant vibrational energy Transfer between mode ν3 of CO2 and N2*. J. Chem. Phys. 50(4), 1720–1726 (1968)
Acknowledgements
This work was supported by the Air Force Office of Scientific Research through AFOSR Grant no. FA9550-14-1-0235, with Dr. Chiping Li as contract monitor.
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Girard, J.J., Hanson, R.K. Minimally intrusive optical probe for in situ shock tube measurements of temperature and species via tunable IR laser absorption. Appl. Phys. B 123, 264 (2017). https://doi.org/10.1007/s00340-017-6840-6
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DOI: https://doi.org/10.1007/s00340-017-6840-6