Spray penetration in a turbulent flow

J. Pozorski, Sergei Sazhin, M. Waclawczyk, Cyril Crua, D. Kennaird, Morgan Heikal

Research output: Contribution to journalArticle

Abstract

Analytical expressions for mass concentration of liquid fuel in a spray are derived taking into account the effects of gas turbulence, and assuming that the influence of droplets on gas is small (intitial stage of spray development). Beyond a certain distance the spray is expected to be fully dispersed. This distance is identified with the maximum spray penetration. Then the influence of turbulence on the spray stopping distance is discussed and the rms spray penetration is computed from a trajectory (Lagrangian) approach. Finally, the problem of spray penetration is investigated in a homogeneous two-phase flow regime taking into account the dispersion of spray away from its axis. It is predicted that for realistic values of spray parameters the spray penetration at large distances from the nozzle is expected to be proportional to t 2/3 (in the case when this dispersion is not taken into account this distance is proportional to t 1/2). The t 2/3 law is supported by experimental observations for a high pressure injector.
Original languageEnglish
Pages (from-to)153-165
Number of pages13
JournalFlow, Turbulence and Combustion
Volume68
Issue number2
Publication statusPublished - Mar 2002

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Turbulent flow
Turbulence
Liquid fuels
Gases
Two phase flow
Nozzles
Trajectories

Bibliographical note

The original publication is available to subscribers at www.springerlink.com

Keywords

  • spray stopping distance
  • turbulent dispersion
  • two-phase flow

Cite this

Pozorski, J., Sazhin, S., Waclawczyk, M., Crua, C., Kennaird, D., & Heikal, M. (2002). Spray penetration in a turbulent flow. Flow, Turbulence and Combustion, 68(2), 153-165.
Pozorski, J. ; Sazhin, Sergei ; Waclawczyk, M. ; Crua, Cyril ; Kennaird, D. ; Heikal, Morgan. / Spray penetration in a turbulent flow. In: Flow, Turbulence and Combustion. 2002 ; Vol. 68, No. 2. pp. 153-165.
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Pozorski, J, Sazhin, S, Waclawczyk, M, Crua, C, Kennaird, D & Heikal, M 2002, 'Spray penetration in a turbulent flow', Flow, Turbulence and Combustion, vol. 68, no. 2, pp. 153-165.

Spray penetration in a turbulent flow. / Pozorski, J.; Sazhin, Sergei; Waclawczyk, M.; Crua, Cyril; Kennaird, D.; Heikal, Morgan.

In: Flow, Turbulence and Combustion, Vol. 68, No. 2, 03.2002, p. 153-165.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Spray penetration in a turbulent flow

AU - Pozorski, J.

AU - Sazhin, Sergei

AU - Waclawczyk, M.

AU - Crua, Cyril

AU - Kennaird, D.

AU - Heikal, Morgan

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PY - 2002/3

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AB - Analytical expressions for mass concentration of liquid fuel in a spray are derived taking into account the effects of gas turbulence, and assuming that the influence of droplets on gas is small (intitial stage of spray development). Beyond a certain distance the spray is expected to be fully dispersed. This distance is identified with the maximum spray penetration. Then the influence of turbulence on the spray stopping distance is discussed and the rms spray penetration is computed from a trajectory (Lagrangian) approach. Finally, the problem of spray penetration is investigated in a homogeneous two-phase flow regime taking into account the dispersion of spray away from its axis. It is predicted that for realistic values of spray parameters the spray penetration at large distances from the nozzle is expected to be proportional to t 2/3 (in the case when this dispersion is not taken into account this distance is proportional to t 1/2). The t 2/3 law is supported by experimental observations for a high pressure injector.

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KW - turbulent dispersion

KW - two-phase flow

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JO - Flow, Turbulence and Combustion

JF - Flow, Turbulence and Combustion

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Pozorski J, Sazhin S, Waclawczyk M, Crua C, Kennaird D, Heikal M. Spray penetration in a turbulent flow. Flow, Turbulence and Combustion. 2002 Mar;68(2):153-165.