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Experiments in Fluids

, 59:70 | Cite as

A three-color absorption/scattering imaging technique for simultaneous measurements on distributions of temperature and fuel concentration in a spray

  • Wenyuan Qi
  • Yuyin Zhang
Research Article
  • 171 Downloads

Abstract

A three-color imaging technique was proposed for simultaneous measurements on distributions of fuel/air mixture temperature and fuel vapor/liquid concentrations in evaporating sprays. The idea is based on that the vapor concentration is proportional to the absorption of vapor to UV light, the liquid-phase concentration is related to the light extinction due to scattering of droplet to visible light, and the mixture temperature can be correlated to the absorbance ratio at two absorbing wavelengths or narrow bands. For verifying the imaging system, the molar absorption coefficients of p-xylene at the three narrow bands, which were centered respectively at 265, 289, and 532 nm with FWHM of 10 nm, were measured in a specially designed calibration chamber at different temperatures (423–606 K) and pressure of 3.6 bar. It was found that the ratio of the molar absorption coefficients of p-xylene at the two narrow bands centered at the two UV wavelengths is sensitive to the mixture temperature. On the other hand, the distributions of fuel vapor/liquid concentrations can be obtained by use of absorbance due to ultraviolet absorption of vapor and visible light scattering of droplets. Combining these two methods, a simultaneous measurement on distributions of mixture temperature and fuel vapor/liquid concentrations can be realized. In addition, the temperature field obtained from the ratio of the two absorbing narrow bands can be further used to improve the measurement accuracy of vapor/liquid concentrations, because the absorption coefficients depend on temperature. This diagnostic was applied to an evaporating spray inside a high-temperature and high-pressure constant volume chamber.

Notes

Acknowledgements

The research was sponsored by National Natural Science Foundation of China (no. 91741130) and Intergovernmental international cooperation in science and technology innovation (no. 2016YFE0127500).

References

  1. Beyrau F, Bräuer A, Seeger T, Leipertz A (2004) Gas-phase temperature measurement in the vaporizing spray of a gasoline direct-injection injector by use of pure rotational coherent anti-Stokes Raman scattering. Opt Lett 29(3):247–249CrossRefGoogle Scholar
  2. Düwel I, Koban W, Zimmermann FP, Dreier T, Schulz C (2009) Spectroscopic characterization of the fluorobenzene/DEMA tracer system for laser-induced exciplex fluorescence for the quantitative study of evaporating fuel sprays. Appl Phys B 97:909–918CrossRefGoogle Scholar
  3. Einecke S, Schulz C, Sick V (2000) Measurement of temperature, fuel concentration and equivalence ratio fields using tracer LIF in IC engine combustion. Appl Phys B 71:717–723CrossRefGoogle Scholar
  4. Faust S, Goschütz M, Kaiser SA, Dreier T, Schulz C (2014) A comparison of selected organic tracers for quantitative scalar imaging in the gas phase via laser-induced fluorescence. Appl Phys B 117:183–194CrossRefGoogle Scholar
  5. Fujimoto H, Choi D, Shima Y, Senda J (2002) Two-dimensional imaging of fuel-vapour concentration by use of LIEF technique during mixture formation process in a DI diesel engine. Meas Sci Technol 13:391CrossRefGoogle Scholar
  6. Gumprecht RO, Sliepcevich CM (1953) Scattering of light by large spherical particles. J Phys Chem 57(1):90–95CrossRefzbMATHGoogle Scholar
  7. Hammond DC (1981) Deconvolution technique for line-of-sight optical scattering measurements in axisymmetric sprays. Appl Opt 20(3):493–499CrossRefGoogle Scholar
  8. Kamimoto T, Yokota H, Kobayashi H (1989) A new technique for the measurement of Sauter mean diameter of droplets in unsteady dense sprays. SAE Technical Paper, p 890316Google Scholar
  9. Lind S, Retzer U, Will S, Zigan L (2017) Investigation of mixture formation in a diesel spray by tracer-based laser-induced fluorescence using 1-methylnaphthalene. Proc Combust Inst 36:4497–4504CrossRefGoogle Scholar
  10. Löffler M, Beyrau F, Leipertz A (2010) Acetone laser-induced fluorescence behavior for the simultaneous quantification of temperature and residual gas distribution in fired spark-ignition engines. Appl Opt 49:37–49CrossRefGoogle Scholar
  11. Melton LA (1983) Spectrally separated fluorescence emissions for diesel fuel droplets and vapor. Appl Opt 22:2224–2226CrossRefGoogle Scholar
  12. Senda J, Kanda T, Kobayashi M, Fujimoto H (1997) Quantitative analysis of fuel vapor concentration in diesel spray by exciplex fluorescence method. SAE Technical Paper, p 970796Google Scholar
  13. Suzuki M, Nishida K, Hiroyasu H (1993) Simultaneous concentration measurement of vapor and liquid in an evaporating diesel spray. SAE Technical Paper, p 930863Google Scholar
  14. Thurber M, Hanson R (2001) Simultaneous imaging of temperature and mole fraction using acetone planar laser-induced fluorescence. Exp Fluids 30:93–101CrossRefGoogle Scholar
  15. Wang Q, Zhang Y (2017) Fluorescence and absorption characteristics of p‑xylene: applicability for temperature measurements. Appl Phys B 123:242CrossRefGoogle Scholar
  16. Westlye FR, Penney K, Ivarsson A et al (2017) Diffuse back-illumination setup for high temporally resolved extinction imaging. Appl Opt 56(17):5028CrossRefGoogle Scholar
  17. Zhang Y (2001) A study on mixture formation in diesel sprays with split injection strategy. Doctor degree dissertation, Hiroshima University, JapanGoogle Scholar
  18. Zhang Y, Yoshizaki T, Nishida K (2000) Imaging of droplets and vapor distributions in a diesel fuel spray by means of a laser absorption–scattering technique. Appl Opt 39:6221–6229CrossRefGoogle Scholar
  19. Zhang Y, Kotani Y, Yoshida A et al (2007) A challenge to vapor distribution measurement of multi-component evaporating fuel spray via laser absorption-scattering (LAS) technique. Combust Sci Technol 179(5):863–881CrossRefGoogle Scholar
  20. Zigan L, Trost J, Leipertz A (2014) Visualisation of temperature and vapour distribution in a gasoline spray. MTZ Worldw 75:50–55CrossRefGoogle Scholar
  21. Zigan L, Trost J, Leipertz A (2016) Simultaneous imaging of fuel vapor mass fraction and gas-phase temperature inside gasoline sprays using two-line excitation tracer planar laser-induced fluorescence. Appl Opt 55:1453–1460CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghaiChina

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