[CO]和[NOx]与最大缸内压力相关的喷射参数对试验柴油机性能和排放影响的数值分析

IF 1.1 4区工程技术 Q4 THERMODYNAMICS

Thermal Science Pub Date : 2023-01-01 DOI:10.2298/tsci220120017b

M. Bencherif, Tewfik Leftas, Nasreddine Larbes

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引用次数: 0

摘要

本文对一台实验性的单缸直喷柴油机进行了数值研究。使用多维详细化学的kiva3v2代码进行计算。研究了排气阀开启前发动机气缸预测的CO和NOx排放水平。预测的NO、CO和NOx水平与燃料、O2、N2浓度和最大缸内压力(而不是温度)有关。预测的平均压力，O2, CO和CO2水平的排气歧管的测量值验证了一组5个负载在1500 rpm。计算得到的排气处CO、NO和NOx浓度与实测值完全吻合。另外，通过数值模拟分析喷射正时、持续时间和喷油量对发动机性能、点火延迟、燃烧持续时间以及CO和NOx排放水平的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Numerical analysis of injection parameters influence on experimental diesel engine performances and emissions using [CO] and [NOx] correlated by maximum in-cylinder pressure

The present work deals with a numerical investigation on an experimental single cylinder direct injection diesel engine. Calculations are carried out with kiva3v2 code using multidimensional detailed chemistry. The study was carried out on predicted CO, and NOx emission levels by the engine cylinder before exhaust valve opening. Correlations proposed for predicted NO, CO and NOx levels function of fuel, O2, N2 concentrations and the maximum in-cylinder pressure rather than temperature. Predicted values of averaged pressures, O2, CO and CO2 levels in the exhaust manifold were validated by the measured ones for a set of five loads at 1500 rpm. CO, NO and NOx concentrations at the exhaust obtained by calculations lies perfectly with measured values. Otherwise, numerical simulations lead us to analyze injection timing, duration and fuel amount injected effect on the engine performances, ignition delay, combustion duration as well as CO and NOx emission levels.

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来源期刊

Thermal Science 工程技术-热力学

CiteScore

2.70

自引率

29.40%

发文量

399

审稿时长

5 months

期刊介绍： The main aims of Thermal Science to publish papers giving results of the fundamental and applied research in different, but closely connected fields: fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes in single, and specifically in multi-phase and multi-component flows in high-temperature chemically reacting flows processes present in thermal engineering, energy generating or consuming equipment, process and chemical engineering equipment and devices, ecological engineering, The important characteristic of the journal is the orientation to the fundamental results of the investigations of different physical and chemical processes, always jointly present in real conditions, and their mutual influence. To publish papers written by experts from different fields: mechanical engineering, chemical engineering, fluid dynamics, thermodynamics and related fields. To inform international scientific community about the recent, and most prominent fundamental results achieved in the South-East European region, and particularly in Serbia, and - vice versa - to inform the scientific community from South-East European Region about recent fundamental and applied scientific achievements in developed countries, serving as a basis for technology development. To achieve international standards of the published papers, by the engagement of experts from different countries in the International Advisory board.