Measurements and simulations of homogeneous charge compression ignition combustion and emissions with exhaust gas recirculation

A. Bhave; M. Balthasar; M. Kraft; M. Christensen; B. Johansson; F. Mauss

Measurements and simulations of homogeneous charge compression ignition combustion and emissions with exhaust gas recirculation

A. Bhave^*, M. Balthasar, M. Kraft, M. Christensen, B. Johansson, F. Mauss

^*Corresponding author for this work

Research output: Contribution to conference › Paper › peer-review

Abstract

Combustion and emissions formation in a homogeneous charge compression ignition (HCCI) engine, fuelled with natural gas, was simulated and compared to experimental measurements. The effect of exhaust gas recirculation (EGR) on pressure and emissions of CO, unburned hydrocarbons (HC), and NO_x was studied. A comparison between the pressure profiles for the non-EGR and 47% EGR cases revealed that the ignition timing and the peak pressure were dependent on EGR. With EGR, the peak pressure reduced and the autoignition was delayed. Good agreement was obtained between the CO and HC emissions predicted by the model, and those obtained from measurements. The ignition characteristics were highly sensitive to NO_x concentration in the initial unburned mixture. An increase in NO_x concentration resulted in earlier ignition and an increase in peak pressure. A detailed NO_x reaction flux analysis and sensitivity analysis were carried out to understand the NO_x emissions and effect of NO_x on ignition characteristics.

Original language	English (US)
Pages	325
Number of pages	1
State	Published - 2002
Externally published	Yes
Event	29th International Symposium on Combustion - Sapporo, Japan Duration: Jul 21 2002 → Jul 26 2002

Other

Other	29th International Symposium on Combustion
Country/Territory	Japan
City	Sapporo
Period	07/21/02 → 07/26/02

ASJC Scopus subject areas

General Engineering

Cite this

@conference{b42f7c3ebec84c7db23a24b974011846,

title = "Measurements and simulations of homogeneous charge compression ignition combustion and emissions with exhaust gas recirculation",

abstract = "Combustion and emissions formation in a homogeneous charge compression ignition (HCCI) engine, fuelled with natural gas, was simulated and compared to experimental measurements. The effect of exhaust gas recirculation (EGR) on pressure and emissions of CO, unburned hydrocarbons (HC), and NOx was studied. A comparison between the pressure profiles for the non-EGR and 47% EGR cases revealed that the ignition timing and the peak pressure were dependent on EGR. With EGR, the peak pressure reduced and the autoignition was delayed. Good agreement was obtained between the CO and HC emissions predicted by the model, and those obtained from measurements. The ignition characteristics were highly sensitive to NOx concentration in the initial unburned mixture. An increase in NOx concentration resulted in earlier ignition and an increase in peak pressure. A detailed NOx reaction flux analysis and sensitivity analysis were carried out to understand the NOx emissions and effect of NOx on ignition characteristics.",

author = "A. Bhave and M. Balthasar and M. Kraft and M. Christensen and B. Johansson and F. Mauss",

year = "2002",

language = "English (US)",

pages = "325",

note = "29th International Symposium on Combustion ; Conference date: 21-07-2002 Through 26-07-2002",

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TY - CONF

T1 - Measurements and simulations of homogeneous charge compression ignition combustion and emissions with exhaust gas recirculation

AU - Bhave, A.

AU - Balthasar, M.

AU - Kraft, M.

AU - Christensen, M.

AU - Johansson, B.

AU - Mauss, F.

PY - 2002

Y1 - 2002

N2 - Combustion and emissions formation in a homogeneous charge compression ignition (HCCI) engine, fuelled with natural gas, was simulated and compared to experimental measurements. The effect of exhaust gas recirculation (EGR) on pressure and emissions of CO, unburned hydrocarbons (HC), and NOx was studied. A comparison between the pressure profiles for the non-EGR and 47% EGR cases revealed that the ignition timing and the peak pressure were dependent on EGR. With EGR, the peak pressure reduced and the autoignition was delayed. Good agreement was obtained between the CO and HC emissions predicted by the model, and those obtained from measurements. The ignition characteristics were highly sensitive to NOx concentration in the initial unburned mixture. An increase in NOx concentration resulted in earlier ignition and an increase in peak pressure. A detailed NOx reaction flux analysis and sensitivity analysis were carried out to understand the NOx emissions and effect of NOx on ignition characteristics.

AB - Combustion and emissions formation in a homogeneous charge compression ignition (HCCI) engine, fuelled with natural gas, was simulated and compared to experimental measurements. The effect of exhaust gas recirculation (EGR) on pressure and emissions of CO, unburned hydrocarbons (HC), and NOx was studied. A comparison between the pressure profiles for the non-EGR and 47% EGR cases revealed that the ignition timing and the peak pressure were dependent on EGR. With EGR, the peak pressure reduced and the autoignition was delayed. Good agreement was obtained between the CO and HC emissions predicted by the model, and those obtained from measurements. The ignition characteristics were highly sensitive to NOx concentration in the initial unburned mixture. An increase in NOx concentration resulted in earlier ignition and an increase in peak pressure. A detailed NOx reaction flux analysis and sensitivity analysis were carried out to understand the NOx emissions and effect of NOx on ignition characteristics.

UR - http://www.scopus.com/inward/record.url?scp=0036936076&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:0036936076

SP - 325

T2 - 29th International Symposium on Combustion

Y2 - 21 July 2002 through 26 July 2002

ER -

Measurements and simulations of homogeneous charge compression ignition combustion and emissions with exhaust gas recirculation

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