Proper orthogonal decomposition analysis of fuel spray structure variation in a spark-ignition direct-injection optical engine

Chen, Hao; Hung, David L.S.; Xu, Min; Zhuang, Hanyang; Yang, Jie

doi:10.1007/s00348-014-1703-y

Cited by 42 publications

(14 citation statements)

References 27 publications

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“…Thus, once the method is applied, a complete connection between spatial, temporal and frequency domains can be revealed. Although some studies have specifically addressed ICE combustion issues through POD, they have been focused on cycle-to-cycle variation analysis [62,63], spark-ignition engine misfire [64] or the evolution of a particular species [65]. Only Torregrosa et al [66] have applied this method to acoustic issues of combustion chambers.…”

Section: Acoustic Analysismentioning

confidence: 99%

Numerical Methodology for Optimization of Compression-Ignited Engines Considering Combustion Noise Control

Broatch¹,

Novella²,

Gómez-Soriano³

et al. 2018

SAE Int. J. Engines

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Section: Acoustic Analysismentioning

confidence: 99%

Numerical Methodology for Optimization of Compression-Ignited Engines Considering Combustion Noise Control

Broatch¹,

Novella²,

Gómez-Soriano³

et al. 2018

SAE Int. J. Engines

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“…Zhang et al [18] found the increased in-cylinder tumble flow intensified the momentum change between spray and air, and promoted the formation of homogenous mixture. Chen et al [19] studied the spray variations resulted by the air flow variations, and later the spray variations were further investigated by measuring the spray patterns in three-dimensional (3D) manner [20]. Disch et al [21] investigated the spray-induced vortex structures within a DISI engine at 3000 rpm using high-speed endoscopic PIV.…”

Section: Introductionmentioning

confidence: 99%

Influence of Early and Late Fuel Injection on Air Flow Structure and Kinetic Energy in an Optical SIDI Engine

Chen

Zhuang

Reuss

et al. 2018

SAE Technical Paper Series

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he turbulent in-cylinder air flow and the unsteady high-pressure fuel injection lead to a highly transient air fuel mixing process in spark-ignition directinjection (SIDI) engines, which is the leading cause for combustion cycle-to-cycle variation (CCV) and requires further investigation. In this study, crank-angle resolution particle image velocimetry (PIV) was employed to simultaneously measure the air flow and fuel spray structure at 1300 rpm in an optically accessible single-cylinder SIDI engine. The measurement was conducted at the center tumble plane of the four-valve pent-roof engine, bisecting the spark plug and fuel injector. 84 consecutive cycles were recorded for three engine conditions, i.e. (1) none-fueled motored condition, (2) homogeneous-charge mode with start of injection (SOI) during intake (50 crank-angle degree (CAD) after top dead center exhaust, aTDCexh), and (3) stratified-charge mode with SOI during mid compression (270 aTDCexh). The air flow structure (quantified by the objective metric-relevance index) and kinetic energy were examined to study the effect of the fuel spray on the air flow. The air flow was nearly identical for three conditions before the fuel injection. During fuel injection, the entrainment of air into the spray was observed near the spray but the flow structure further away from the spray was not significantly affected for both homogeneous and stratified charge modes. Right after the fuel was atomized, the spray increased the kinetic energy of air f low by 48 ± 25% and 45 ± 40% (average ± standard variation, with CCV included in standard deviation) for spray at intake and compression stroke, respectively. Spray changed the flow structure and kinetic energy immediately after injection for both conditions. The changes caused by injection during intake did not affect the flow and CCV at spark timing. For injection during mid compression, both the flow-structure and kinetic-energy CCV were apparently affected at spark timing. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE International.

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“…Other authors have applied POD to combustion processes, be it through CFD simulations [185], or experimentally obtaining the flow snapshots with the aid of optical techniques such as PIV [186][187][188][189], chemiluminiscence [190] or raw luminosity [191], but most of these results are restricted to continuous combustion cases such as those of gas turbines or industrial Although some authors have specifically addressed ICE combustion issues through POD, these studies have been focused on cycle-to-cycle variation analysis [191][192][193], spark-ignition misfires [194] or the evolution of a particular species [195], whereas the pressure resonance issues of CI combustion chambers addressed in this work has not been yet investigated using this method.…”

Section: Proper Orthogonal Decompositionmentioning

confidence: 99%

Computational assessment of combustion noise of automotive compression-ignited engines

Soriano¹

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derstanding the unsteady pressure field inside combustion chambers of compression ignition engines using a CFD approach". International J of Engine Research (available on-line), 2018. I would like to record my sincere gratitude to my advisor Prof. Alberto Broatch for his guidance and support during the chase of this research. A gratitude that also must be extended to Prof. Payri and Prof. Desantes on behalf of CMT-Motores Térmicos and Universitat Politècnica de València for offering me the chance to become part of this research group during these four years. I owe my most special thanks to Prof. Ricardo Novella for his advice and invaluable help in the most difficult moments but especially for the good ones we shared during the fruitless lunchtime discussions, sports sessions... I just can say, moltes gràcies per tot Rick.

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Proper orthogonal decomposition analysis of fuel spray structure variation in a spark-ignition direct-injection optical engine

Cited by 42 publications

References 27 publications

Numerical Methodology for Optimization of Compression-Ignited Engines Considering Combustion Noise Control

Numerical Methodology for Optimization of Compression-Ignited Engines Considering Combustion Noise Control

Influence of Early and Late Fuel Injection on Air Flow Structure and Kinetic Energy in an Optical SIDI Engine

Computational assessment of combustion noise of automotive compression-ignited engines

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