Zero-dimensional modeling of NOx formation with least squares interpolation

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Zero-dimensional modeling of NOx formation with least squares interpolation. / Muric, Kenan; Stenlaas, Ola; Tunestål, Per.

I: International Journal of Engine Research, Vol. 15, Nr. 8, 2014, s. 944-953.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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TY - JOUR

T1 - Zero-dimensional modeling of NOx formation with least squares interpolation

AU - Muric, Kenan

AU - Stenlaas, Ola

AU - Tunestål, Per

PY - 2014

Y1 - 2014

N2 - Physical models of NOx formation are becoming more and more interesting in the area of combustion feedback control. The fact that cylinder pressure sensors are made available on the market enables fast and accurate calculations of heat release, which is an essential part of every physical NOx formation model. This article describes such a zero-dimensional model for a diesel engine using crank angle-resolved cylinder pressure to determine heat release. The model also incorporates the thermal effect of exhaust gas recirculation that is proven to have a major effect on NOx formation rates. The reaction mechanisms used to describe NOx formation rates are given by the well-known Zeldovich mechanism. The model output results given in this article show an average deviation of about 12.0% from acquired measured NOx data. The least squares interpolation approach indicates a negligible difference from the original model with an average deviation of 1.2% in 25 measurement points.

AB - Physical models of NOx formation are becoming more and more interesting in the area of combustion feedback control. The fact that cylinder pressure sensors are made available on the market enables fast and accurate calculations of heat release, which is an essential part of every physical NOx formation model. This article describes such a zero-dimensional model for a diesel engine using crank angle-resolved cylinder pressure to determine heat release. The model also incorporates the thermal effect of exhaust gas recirculation that is proven to have a major effect on NOx formation rates. The reaction mechanisms used to describe NOx formation rates are given by the well-known Zeldovich mechanism. The model output results given in this article show an average deviation of about 12.0% from acquired measured NOx data. The least squares interpolation approach indicates a negligible difference from the original model with an average deviation of 1.2% in 25 measurement points.

KW - NOx

KW - model

KW - Zeldovich

KW - interpolation

KW - zero-dimensional

KW - engine

KW - thermodynamics

U2 - 10.1177/1468087413495843

DO - 10.1177/1468087413495843

M3 - Article

VL - 15

SP - 944

EP - 953

JO - International Journal of Engine Research

JF - International Journal of Engine Research

SN - 1468-0874

IS - 8

ER -