Flame Propagation Characteristics in a Heavy Duty LPG Engine with Liquid Phase Port Injection

Oh, Sung‐Yong; Kim, Seungyu; Bae, Choongsik; Kim, Changup; Kang, Kernyong

doi:10.4271/2002-01-1736

Cited by 14 publications

(6 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…An important parameter that affects both the operating parameters and the exhaust toxicity for sequential injection is the start of fuel injection (Hyun et al, 2002;Oh et al, 2002). For this reason a large part of the measurements was the analysis of the impact of the start of injection on obtained engine parameters and the emission of toxic ingredients in exhaust gases.…”

Section: Test Stand and Research Methodsmentioning

confidence: 99%

The Effect of Injection Timing on the Environmental Performances of the Engine Fueled by LPG in the Liquid Phase

Jaworski¹,

Kuszewski²,

Ustrzycki³

2012

Internal Combustion Engines

View full text Add to dashboard Cite

Section: Test Stand and Research Methodsmentioning

confidence: 99%

The Effect of Injection Timing on the Environmental Performances of the Engine Fueled by LPG in the Liquid Phase

Jaworski¹,

Kuszewski²,

Ustrzycki³

2012

Internal Combustion Engines

View full text Add to dashboard Cite

“…The slope of a contour on the CHTS represents the rate of change of the projected area of a reaction zone, defined by a given threshold with respect to time. By selecting a characteristic length scale, such as the reaction zone perimeter 19 or equivalent radius, 13 the area growth rate can be used to define a characteristic reaction zone growth speed S RZ .…”

Section: Comparison Of Optical and Thermodynamic In-cylinder Measuremmentioning

confidence: 99%

“…Optically accessible SI engines have been employed to measure S FP for a number of fuels and operating conditions. Common optical diagnostics used include one or more of natural luminosity (NL), 12 OH*-chemiluminescence (OH*-CL), 13 OH planar laser–induced fluorescence (OH-PLIF), 14 or Schlieren. 15 By binarizing the images, a clear reaction zone area can be visualized and a corresponding reaction zone area rate of change can be calculated.…”

Section: Introductionmentioning

confidence: 99%

Characterization of reaction zone growth in an optically accessible heavy-duty diesel/methane dual-fuel engine

Rochussen

Kirchen

2018

International Journal of Engine Research

View full text Add to dashboard Cite

The performance of dual-fuel engines in terms of fuel conversion efficiency and unburned hydrocarbon emission is strongly influenced by the turbulent flame propagation through the premixed natural gas. To improve dual-fuel engine design and provide validation data for numerical models, the fuel conversion process must be better characterized, specifically the reaction zone growth rate. In this work, high-speed imaging of OH*-chemiluminescence is performed in an optically accessible 2 L engine operated with port-injected CH4 and direct-injected diesel for different diesel and CH4 fueling rates and pilot injection pressures ( Ppilot). The cumulative histogram time series is introduced for directly comparing high-speed optical data of dual-fuel combustion with simultaneously measured apparent heat release rate. The cumulative histogram time series diagram is also used to evaluate a “global” reaction zone speed, SRZ,g, based on OH*-chemiluminescence images. The SRZ,g calculation normalizes the reaction zone area growth rate by the perimeter of the reaction zone to determine the velocity scale, while a “local” reaction zone speed, SRZ,l, is based on the local displacement of the reaction zone boundary per unit time. From the distribution of SRZ,l for each image frame, a previously proposed metric for determining the transition from pilot autoignition based on apparent heat release rate was validated and used to evaluate a single mean flame propagation speed, [Formula: see text]. Using these metrics, it was noted that increasing ϕCH4 from 0.40 to 0.69 results in an increase in [Formula: see text] from 4 to 8 m/s and 8 to 14 m/s for pilot injection pressures of 300 and 1300 bar, respectively. The spatial distribution of SRZ,l also indicates that autoignition of the pilot jets is not simultaneous (arising from asymmetric injector geometry) and leads to an overlap of the autoignition and flame propagation processes. This is not considered in the conventional conceptual model of dual-fuel combustion and impacts calculation of [Formula: see text] for the small diesel injections commonly used for dual-fuel engines.

show abstract

“…on parameters of the gasoline injection, which means, it is mainly dependent on the injection time and the onset time of the injection. With regard to different physical and chemical properties of the LPG fuel in relation to gasoline during the realization of the injection process appropriate corrections are required [2,3,4,12].…”

Section: Obiekt I Zakres Badań Eksperymentalnychmentioning

confidence: 99%

“…głównie od czasu wtrysku i początku wtrysku. Z uwagi na odmienne właściwości fi zykochemiczne paliwa LPG w relacji do benzyny wymagane są niezbędne korekty w realizacji procesu wtrysku [2,3,4,12].…”

Section: Ptnss-2007-ss3-215 1 Introductionunclassified

The effect of injection timing parameters for liquid LPG fuel on selected operating parameters of the internal combustion engine

Lejda¹,

Jaworski²,

Ustrzycki³

2007

Combustion Engines

View full text Add to dashboard Cite

This article presents selected results of scientifi c research concerning the infl uence of the LPG fuel sequential injection parameters on the operating parameters of the internal combustion engine. Research was performed in the Department of Vehicles and IC Engines on SI MD-111E engine, which has been adapted to LPG fuel supply in multi-point injection system to the branches of the inlet manifold. During the research the sequential single and double injection were performed. The tests results obtained show very signifi cant infl uence of the injection parameters (onset of injection and size of the dose) on the engine operating parameters such as: engine power, torque end effi ciency.

show abstract

Flame Propagation Characteristics in a Heavy Duty LPG Engine with Liquid Phase Port Injection

Abstract: No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher.

Cited by 14 publications

References 23 publications

The Effect of Injection Timing on the Environmental Performances of the Engine Fueled by LPG in the Liquid Phase

The Effect of Injection Timing on the Environmental Performances of the Engine Fueled by LPG in the Liquid Phase

Characterization of reaction zone growth in an optically accessible heavy-duty diesel/methane dual-fuel engine

The effect of injection timing parameters for liquid LPG fuel on selected operating parameters of the internal combustion engine

Contact Info

Product

Resources

About