PDF-based simulations of turbulent spray combustion in a constant-volume chamber

S. Bhattacharjee, J. Jaishree, V. Raj Mohan, H. Zhang, Daniel Connell Haworth

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Transported probability density function (PDF) methods are used to simulate liquid fuel injection (n-heptane), vaporization, mixing, autoignition, and combustion for a constant-volume combustion chamber under diesel-engine-like conditions. Both stochastic Lagrangian particle and stochastic Eulerian field methods are used to solve the modeled PDF transport equation. Model results are compared with experimental measurements for nonreacting vaporizing sprays and for cases with autoignition and combustion. Parametric studies of the influences of key physical and numerical parameters are performed to establish sensitivities. The model generally captures the measured trends in ignition timing and liftoff length with variations in the thermochemical environment. The most important finding is that there are large differences between results from simulations that include the transported PDF method and those from simulations that ignore local turbulent fluctuations in composition and temperature. This underscores the importance of accounting explicitly for turbulence-chemistry interactions in simulations of autoignition and combustion in compression-ignition engines.

Original languageEnglish (US)
Title of host publicationFall Technical Meeting of the Eastern States Section of the Combustion Institute 2011
PublisherCombustion Institute
Pages578-582
Number of pages5
ISBN (Electronic)9781622761258
StatePublished - Jan 1 2011
EventFall Technical Meeting of the Eastern States Section of the Combustion Institute 2011 - Storrs, United States
Duration: Oct 9 2011Oct 12 2011

Publication series

NameFall Technical Meeting of the Eastern States Section of the Combustion Institute 2011

Other

OtherFall Technical Meeting of the Eastern States Section of the Combustion Institute 2011
CountryUnited States
CityStorrs
Period10/9/1110/12/11

Fingerprint

spontaneous combustion
probability density functions
Probability density function
sprayers
chambers
Vaporization
ignition
Ignition
liquid injection
fuel injection
liquid fuels
vaporizing
diesel engines
simulation
Fuel injection
Liquid fuels
Heptane
heptanes
combustion chambers
Combustion chambers

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Mechanical Engineering
  • Chemical Engineering(all)

Cite this

Bhattacharjee, S., Jaishree, J., Raj Mohan, V., Zhang, H., & Haworth, D. C. (2011). PDF-based simulations of turbulent spray combustion in a constant-volume chamber. In Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2011 (pp. 578-582). (Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2011). Combustion Institute.
Bhattacharjee, S. ; Jaishree, J. ; Raj Mohan, V. ; Zhang, H. ; Haworth, Daniel Connell. / PDF-based simulations of turbulent spray combustion in a constant-volume chamber. Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2011. Combustion Institute, 2011. pp. 578-582 (Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2011).
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Bhattacharjee, S, Jaishree, J, Raj Mohan, V, Zhang, H & Haworth, DC 2011, PDF-based simulations of turbulent spray combustion in a constant-volume chamber. in Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2011. Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2011, Combustion Institute, pp. 578-582, Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2011, Storrs, United States, 10/9/11.

PDF-based simulations of turbulent spray combustion in a constant-volume chamber. / Bhattacharjee, S.; Jaishree, J.; Raj Mohan, V.; Zhang, H.; Haworth, Daniel Connell.

Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2011. Combustion Institute, 2011. p. 578-582 (Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2011).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - Transported probability density function (PDF) methods are used to simulate liquid fuel injection (n-heptane), vaporization, mixing, autoignition, and combustion for a constant-volume combustion chamber under diesel-engine-like conditions. Both stochastic Lagrangian particle and stochastic Eulerian field methods are used to solve the modeled PDF transport equation. Model results are compared with experimental measurements for nonreacting vaporizing sprays and for cases with autoignition and combustion. Parametric studies of the influences of key physical and numerical parameters are performed to establish sensitivities. The model generally captures the measured trends in ignition timing and liftoff length with variations in the thermochemical environment. The most important finding is that there are large differences between results from simulations that include the transported PDF method and those from simulations that ignore local turbulent fluctuations in composition and temperature. This underscores the importance of accounting explicitly for turbulence-chemistry interactions in simulations of autoignition and combustion in compression-ignition engines.

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Bhattacharjee S, Jaishree J, Raj Mohan V, Zhang H, Haworth DC. PDF-based simulations of turbulent spray combustion in a constant-volume chamber. In Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2011. Combustion Institute. 2011. p. 578-582. (Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2011).