An investigation of mixing stratification of DME and n-Butane in HCCI engines using chemiluminescence imaging

Osamu Iwama, Satoshi Yamaoki, Norimasa Iida

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

4 Citations (Scopus)

Abstract

In HCCI engines, high load operation is limited by an excessive pressure rise rate (PRR). Past studies showed that mixing stratification with the fuel that has large heat release in low temperature reaction (LTR), disperses the timing of local ignition and slows the PRR. The purpose of this study was to gain a better understanding of effect of the mixing stratification on HCCI combustion using chemiluminescence imaging. Di-methyl ether (DME) which has large heat release in LTR and n-Butane, smaller heat release in LTR than that of DME, were used. Experiments were conducted on five mixing conditions depending on the combination of the charging methods (homogeneous charge or stratified charge) of DME and n-Butane, using a single-cylinder engine equipped with optical access. Chemiluminescence imaging was used to assess a local combustion phasing. The experimental observation shows that, in the case of fuels stratification, maximum PRR is reduced compared to the case of fuels homogeneity. In the stratified case, the start timing of local chemiluminescence is dispersed and total chemiluminescence duration is longer than that of the homogeneous case.

Original languageEnglish
Title of host publicationProceedings of the 7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008
Pages97-104
Number of pages8
Publication statusPublished - 2008
Event7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008 - Sapporo, Japan
Duration: 2008 Jul 282008 Jul 31

Other

Other7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008
CountryJapan
CitySapporo
Period08/7/2808/7/31

Fingerprint

Chemiluminescence
Butane
Stratification
Ethers
Engine
Heat
Imaging
Engines
Imaging techniques
Combustion
Timing
Charge
Mixing Conditions
Ignition
Homogeneity
Engine cylinders
Temperature
Experiment
Hot Temperature
Experiments

Keywords

  • Chemiluminescence
  • HCCI
  • Stratification

ASJC Scopus subject areas

  • Automotive Engineering
  • Control and Systems Engineering
  • Modelling and Simulation

Cite this

Iwama, O., Yamaoki, S., & Iida, N. (2008). An investigation of mixing stratification of DME and n-Butane in HCCI engines using chemiluminescence imaging. In Proceedings of the 7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008 (pp. 97-104)

An investigation of mixing stratification of DME and n-Butane in HCCI engines using chemiluminescence imaging. / Iwama, Osamu; Yamaoki, Satoshi; Iida, Norimasa.

Proceedings of the 7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008. 2008. p. 97-104.

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

Iwama, O, Yamaoki, S & Iida, N 2008, An investigation of mixing stratification of DME and n-Butane in HCCI engines using chemiluminescence imaging. in Proceedings of the 7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008. pp. 97-104, 7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008, Sapporo, Japan, 08/7/28.
Iwama O, Yamaoki S, Iida N. An investigation of mixing stratification of DME and n-Butane in HCCI engines using chemiluminescence imaging. In Proceedings of the 7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008. 2008. p. 97-104
Iwama, Osamu ; Yamaoki, Satoshi ; Iida, Norimasa. / An investigation of mixing stratification of DME and n-Butane in HCCI engines using chemiluminescence imaging. Proceedings of the 7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008. 2008. pp. 97-104
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