Advertisement

Measurement Uncertainties of Phase Doppler Technique due to Effect of Slit Location, Control Volume Size Effects

  • Yuji Ikeda
  • Toshiaki Hirohata
  • Tsuyoshi Nakajima
Conference paper

Abstract

Measurement uncertainties of phase Doppler technique in application for practical combusting spray was investigated. There are many error sources reported as Gaussian beam effect, trajectory effect and slit effect and so on. But further measurement uncertainties may be yielded such as slit location shift effect, optical measurement volume size choice and flame front pressure effect. In this study, two dominant factors have been examined in measurements of spray burner of 0.1MW

It is found that the slit location shift effect can hardly be avoided in combustion and numerous errors may be caused. Quantitative uncertainty value will be examined in this study. The control volume size should be determined in consideration of velocity gradient in shear flow region. But this matter is not considered in the practical measurement. This error sources were also discussed here. The flame front will change the optical path like slit location shift so as to have measurement error in the small diameter droplet.

Keywords

Phase Doppler technique Spray measurement Measurement uncertainties Slit location effect Measurement volume size effect 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Durst, F., et al., (1988) Proceedings of the Phase-Doppler Technique, Experiments in Fluids, vol. 6Google Scholar
  2. Bachalo, W.D., (1980) Method for Measuring the Size and Velocity of Spheres by Dual-Beam Light Scatter Interferometry., Appl. Opt.. vol. 19, No. 3, 363–370ADSCrossRefGoogle Scholar
  3. Bauckhage, K., (1985)International Conference Laser Anemometry Advances and Application, Manchester, 261–278Google Scholar
  4. Edwards, C.F., and Rudoff, R. C., (1990) Structure of a Swirl-Stabilized Spray Flame by Imaging, Laser Doppler Velocimetry, and Phase Doppler Anemometry, Proc. 23d Symp. (Int.) on Comb., 1353–1359Google Scholar
  5. Taylor, A.M.K.P., (1993)Instrumentation for Flows with Combustion, Academic PressGoogle Scholar
  6. Lai, M.-C., et al., (1994) Atomization and Vaporization Characteristics of Airblast Capillary Fuel Injection inside a Venturi Tube, Proc. IUTAM Symp. on Mechanics and Combution of Droplets and Sprays, Taiwan, 31–40Google Scholar
  7. Mizutani, Y., et al., (1994) Optical Observation of Group Combustion Behaviors of Premixed Spray, Proc. IUTAM Symp. on Mechanics and Combution of Droplets and Sprays, Taiwan, 157–166Google Scholar
  8. Hardalupas, Y., et al., (1994) Coaxial Atomization and Combustion, Proc. IUTAM Symp. on Mechanics and Combution of Droplets and Sprays, Taiwan, 41–74Google Scholar
  9. Edwards, C.F., (1994) Application of Ideal Spray Concepts to Understanding the Stochastic Dynamics of Sprays, Proc. IUTAM Symp. on Mechanics and Combution of Droplets and Sprays, Taiwan, 277–290Google Scholar
  10. McDonell, V.G., et al., (1986) A Comparison of Spatially-Resolved Drop Size and Drop Velocity Measurements in an Isothermal Chamber and a Swirl-Stabilized Combustor, Proc. 21st Symp. (Int.) on Comb., 685–694Google Scholar
  11. Grehan, G., et al., (1991) Evaluation of a Phase Doppler System Using Generalized Lorenz-Mie Theory, Int. Conf. on Multiphase Flows ´91, 291–296Google Scholar
  12. Sankar, S. V., et al., (1992) Trajectory Dependent Scattering in Phase Doppler Interferometry: Minimizing and Eliminating Sizing Error, Proc. 6th Int. Symp. of Laser Tech. to Fluid Mech., Lisbon., 12.2.1Google Scholar
  13. Xu.T.-H., Tropea, C., (1994) Improving the Performance of Two-Component Phase Doppler Anemometers, Meas. Sci. and Techn., 5, 969–975ADSCrossRefGoogle Scholar
  14. Aizu, Y., et al., (1993) PDA Systems without Gaussian Beam Defects., Proc. 3rd Int. Conf. Optical Particle Sizing., Japan, 461–470Google Scholar
  15. Bachalo, W.D and Sankar, S.V, (1994) Factors Affecting the Measurement Resolution and Accuracy of the Phase Doppler Particle Analyzer, The Second Int. Conf on Fluid Dynamics Meas. and Its Appl.Google Scholar
  16. Tropea, C., et al., (1995) Dual Mode Phase Doppler Anemometer., Proc. 4th Int. Cong. Optical Particle Sizing, vol. 4, 287–296Google Scholar
  17. Sankar, S.V., and Bachalo, W.D., (1995) Performance Analysis of Various Phase Doppler Systems., Proc. 4th Int. Cong. Optical Particle Sizing, vol.4, 407Google Scholar
  18. Sankar, S.V., et al., (1994) Simultaneous Measurements of Droplet Size, Velocity, and Temperature in a Swirl-Stabilized Spray Flame., Proc. 7th Int. Symp. of Laser Tech. to Fluid Mech., Lisbon., 12.3.1Google Scholar
  19. Scott, A.S., et al., (1994) Theoretical analysis of the effects of particle trajectory and structural resonances on the performance of a phase-Doppler particle analyzer., Appl. Opt., vol. 33, No. 3, 473–483ADSCrossRefGoogle Scholar
  20. Sankar, S.V., et al., (1995) An Adaptive Intensity Validation Technique for Minimizing Trajectory Dependent Scattering Errors in Phase Doppler Interferom-etry., Proc. 4th Int. Cong. Optical Particle Sizing, vol. 4, 285Google Scholar
  21. Tropea, C., et al., (1994) Dual-Mode Phase Doppler Anemometer., Proc. 7th Int. Symp. of Laser Tech. to Fluid Mech., Lisbon., 18.3.1Google Scholar
  22. Maeda, T., et al., (1996) Determination of Effective Measurement Area in a Conventional Phase-Doppler Anemometry, Proc. 8th Int. Symp. of Laser Tech. to Fluid Mech., Lisbon., 2.5.1Google Scholar
  23. Naqwi, A., (1996) Optimization of the Shape of Receiving Aperture in a Phase Doppler Syatem, Proc. 8th Int. Symp. of Laser Tech. to Fluid Mech., Lisbon., 2.2.1Google Scholar
  24. Ikeda, Y., et al., (1990) A Compact Fibre LDV with a Perforated Beam Expander., Meas. Sci. and Techn., 1, 260–4ADSCrossRefGoogle Scholar
  25. Brenn, G., et al., (1994) Investigation of Polydisperse Spray Interaction Using an Extended Phase-Doppler Anemometry, Proc. 7th Int. Symp. of Laser Tech. to Fluid Mech., Lisbon., 21.1.1Google Scholar
  26. Brenn, G., et al., (1996) Investigation on Accuracy and Resolution of Refractive Index Measurements with an Extended Phase-Doppler Anemometer, Proc. 8th Int. Symp. of Laser Tech. to Fluid Mech., Lisbon., 9.4.1Google Scholar
  27. Durst, F., and Brenn, G., (1994) ExtendedPhase-Doppler Anemometers and their Application to Measure Spray Properties, Proc. IUTAM Symp. on Mechanics and Combution of Droplets and Sprays, Taiwan, 241–264Google Scholar
  28. Naqwi, A., et al., (1991) Two-Optical Methods for Simultaneous Measurement of Particle Size, Velocity, and Refractive Index., Applied Optics, 30, 4949–4959ADSCrossRefGoogle Scholar
  29. Ancimer, R.J and Fraser, R.A, (1994) Flame-Induced Laser Doppler Velocimetry Velocity Bias, Meas. Sci. and Techn., 5, 83–92ADSCrossRefGoogle Scholar
  30. Kuo K., (1986) Principles of Combustion, WileyGoogle Scholar
  31. Ikeda, Y., et al., (1995) Flux Measurements of 02, C02 and NO in an Oil Furnace, Meas. Sci. and Techn., 6, 826–832ADSCrossRefGoogle Scholar
  32. Kawahara, N., et al., (1996) Size-Classified Droplets Dynamics of Combusting Spray in 0.1 MW Oil Furnace, Proc. 8th Int. Symp. of Laser Techn. to Fluid Mech., Lisbon., 10.5.1Google Scholar
  33. Kawahara, N., et al., (1995) Droplet Followability and Slip Velocity Analysis of Evaporating Spray on Gun-Type Oil Burner, 4th Int. Cong. Optical Particle Sizing, vol.4, 593–602Google Scholar
  34. Kawahara, N., et al., (1997) Droplet Dispersion and Turbulent Structure in a Pressure-Atomized Spray Flame, AIAA Paper 97–0125Google Scholar
  35. Edwards, C.F., and Rudoff, R. C., (1990) “ Structure of a Swirl-Stabilized Spray Flame by Imaging, Laser Doppler Velocimetry, and Phase Doppler Anemometry”, Proc. Twenty-Third Symposium on combustion, 1353–1359Google Scholar
  36. Presser, C., et al., (1995) Interpretation of Size-Classified Droplet Velocity Data in Swirling Spray Flames, AIAA Paper 95–0283Google Scholar
  37. Seay, J., et al., (1995) Atomisation and Dispersion from a Radial Airblast Injector in a Subsonic Crossflow, AIAA Paper 95–3001Google Scholar
  38. Ikeda, Y., et al., (1996) Spray Formation and Dispersion of Size-Classified Fuel Droplet of Air-Assist Injector, Proc. 8th Int. Symp. of Laser Techn. to Fluid Mech., Lisbon., 13.6.1Google Scholar
  39. Edwards, C.F., et al., (1990) Measurement of Correlated Droplet Size and Velocity Statics, Size Distribution, and Volume Flux in a Steady Spray Flame, 5th Int. Symp. of Laser Tech. to Fluid Mech., Lisbon., 31.5.1Google Scholar
  40. Bachalo, W.D., (1994) Injection, Dispersion, and Combustion of Liquid Fuels, 25th Symp. (Int.) on Comb., 333–344Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Yuji Ikeda
    • 1
  • Toshiaki Hirohata
    • 1
  • Tsuyoshi Nakajima
    • 1
  1. 1.Department of Mechanical EngineeringKobe UniversityRokkodaiJapan

Personalised recommendations