A method of turbocharger design optimization for a diesel engine with exhaust gas recirculation

Din, Syed Ammad ud; Zhuge, Weilin; Song, Panpan; Zhang, Yangjun

doi:10.1177/0954407018802560

Cited by 4 publications

(1 citation statement)

References 22 publications

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“…To reach these objectives, several works tried to redesign or to propose a new design of TC compressor to enhance the engine output power, 9,10 improve mechanical sustainability, 11,12 secure working of the CC (surge margin), [13][14][15][16] or to optimize the design procedure. 17,18 Some researches were focused on the components of the TC or ICE including inlet and exhaust manifolds, 19 intercooler, 20,21 the CC and RIT casings, 22,23 variable turbine geometry, 24 exhaust gas recirculation, 25,26 or twin-entry radial turbine. 27,28 Due to the TC's technical complexity and cost, limited experimental studies were carried out in the matching field.…”

Section: Introductionmentioning

confidence: 99%

An approach to select an appropriate turbocharger for matching with an internal combustion engine

Hameur

Sehili

Cerdoun

et al. 2022

International Journal of Engine Research

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The present paper proposes a novel methodology of turbocharging automotive engines to reach targeted performance. The actual method is tested and validated against simulation test results of two turbocharged diesel engines; engine I, three cylinders, 1.5 L, and engine II, six cylinders, 5.9 L. The present procedure is subdivided into four key parts; namely, database construction, selection procedure, turbocharger preliminary design, and engine modeling. Based on geometric dimensions and aerodynamic parameters provided by the preliminary design procedure, 3D geometries of the turbine and compressor are generated for each studied engine. After integrating previous data into a constructed turbocharger database, two turbochargers are selected for the engine I, while only one turbocharger for the engine II. The findings show that, at the engine speed of 4000 rpm, engine I matched with the adequate turbocharger reached a target power about 2.7%, compared to the original turbocharger equipping engine I. Furthermore, engine II reached a rated power of 299.3 kW at 2500 rpm which is slightly under the original one by 2.64 kW. The superimposition of the engine operating area on compressor and turbine maps provided satisfactory results in terms of turbocharger-engine output performance, fuel consumption, secure functioning and engine thermal strength. Finally, the main advantage of the developed methodology consists of its ability to be applied at both earlier and last stages of the engine turbocharging process or to find new adequate turbochargers to replace the original one for economic, mechanical or for safety reasons.

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Section: Introductionmentioning

confidence: 99%

An approach to select an appropriate turbocharger for matching with an internal combustion engine

Hameur

Sehili

Cerdoun

et al. 2022

International Journal of Engine Research

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Influence of tip clearance distribution on blade vibration of vaneless radial turbine

Pan

Yang

Murae

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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As vehicle turbochargers are developed toward higher performance and lower turbo lag, high cycle fatigue (HCF) of radial turbine blades is becoming increasingly common which greatly threatens the reliability of turbochargers. Tip leakage vortex is one of potential sources of blade excitation and it’s profoundly influenced by blade tip clearance. This paper studies the influence of tip clearance distribution on blade excitation of a vaneless radial turbine via experimentally validated one-way fluid-structure interaction (FSI) numerical method. The results suggest that blade vibration response is significantly influenced by tip clearance distribution in the meridional direction. Generalized energy method is proposed to determine the key factors for blade excitation. The results manifest that complex distributions of harmonic pressure amplitude on the blade dominate blade vibration response. Detailed flow field analysis is carried out to further investigate the mechanism of blade excitation. The results show that distributions of harmonic pressure amplitude on pressure surface (PS) and suction surface (SS) are both dominated by tip leakage vortex, whereas the roles that tip leakage vortex plays are quite different. Specifically, tip leakage vortex influences harmonic pressure amplitude on SS directly because of short distance between vortex core and SS, whereas it influences harmonic pressure amplitude on PS indirectly by interfering the evolution of passage vortex. This research can guide new designs for durable vaneless radial turbines without sacrificing aerodynamic performance.

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An improved model for primary prediction of performance map for turbocharger radial turbine

El Hameur,

Cerdoun,

Tarabet

2024

Proceedings of the Institution of Mechanical Engineers, Part D:

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In the contemporary landscape, possessing an intricate understanding of the performance characteristics of turbocharger radial turbine proves invaluable during engine development phases, to improve predictive capabilities of calculation codes and enhance the critical process of matching engines with turbochargers. This research deals with offering two precise yet straightforward analytical functions intended to generate comprehensive performance maps of turbocharger turbines. This is achieved through a refined adjustment of a preexisting analytical function, after introducing an inventive multiplication factor that aligns numerical calculations with experimental data to predict the turbine’s expansion ratio. Besides, a second analytical function forecasts the turbine’s thermo-mechanical efficiency by establishing a power balance equation between the turbine and supplied compressor map. The outcome of the developed model is compared with existing method on two distinct turbochargers, encompassing various rotational speeds. Additionally, a sensitive analysis aiming to detect the most important factors affecting our developed model while exploring it possible validity range for different thermodynamic parameters. The results indicate that the two functions yield reliable estimations of turbine performance, with maximum; root mean square error, R2, and mean absolute percentage error indices find around 9.47%, 0.993, and 9.03% for the turbine expansion ratio, and about 4.42%, 0.612, and 19.78% for efficiency prediction. This novel model enhances simulation accuracy while preserving user-friendliness and robustness based on the prerequisite of limited geometric and thermodynamic parameters at the turbocharger boundaries. Finally, the main advantages of the proposed model is its adaptability for the implementation in calculation codes, turbomachinery optimization strategies and assessments of the design and performance, addressing scenarios where the original turbine maps are rarely provided by turbocharger manufacturers.

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A method of turbocharger design optimization for a diesel engine with exhaust gas recirculation

Cited by 4 publications

References 22 publications

An approach to select an appropriate turbocharger for matching with an internal combustion engine

An approach to select an appropriate turbocharger for matching with an internal combustion engine

Influence of tip clearance distribution on blade vibration of vaneless radial turbine

An improved model for primary prediction of performance map for turbocharger radial turbine

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