Numerical investigation of valve lifts effects on performance and emissions in diesel engine

Bayramoğlu, Kubilay; Yılmaz, Semih; Kaya, Kerim Deniz

doi:10.1504/ijgw.2019.101088

Cited by 10 publications

(6 citation statements)

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“…(1) Experiment schemes of valve lift dissimilitude When the valve lift is high, due to the large valve opening, a large amount of gas enters the cylinder, which significantly impacts the intake performance (Kubilay et al 2019). Therefore, this section will focus on the maximum valve lift (8 mm) of the spiral and tangential inlets to study the influence of valve lift dissimilitude on the intake performance of the diesel engine.…”

Section: Influence Of the Valve Lift Dissimilitude On Intake Performancementioning

confidence: 99%

Influence of Intake Valve Structure Combined with Valve Lift Dissimilitude on Intake Performance of Diesel Engine

2023

JAFM

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For diesel engines equipped with a combined spiral/tangential inlet, the main object of the valve structure and valve lift dissimilitude strategies is the valve, the changes of both will alter the motion state of the in-cylinder airflow, which has an important impact on the formation and combustion of the mixture. In order to investigate the flow performance of valve structure and valve lift dissimilitude, this paper used computational fluid dynamics (CFD) numerical simulation and multi-parameter regression methods to optimize the dual intake valve structure and obtained three valve structures with better intake performance first. Then, the optimized intake valve structure models were combined with the valve lift dissimilitude schemes to conduct steady-flow tests for the intake port. Through the reasonable combining of the two, the intake performance of the original engine was further improved. The results show that the valve structure has a relatively small influence on the intake mass, while it has a greater effect on the formation of the swirl in the cylinder, increasing the swirl ratio by 8.0%. The optimized valve structure model was combined with the valve lift dissimilitude scheme. It was found that the valve structure with optimal intake mass combined with the dissimilitude scheme of the largest valve lift of the spiral inlet could increase the flow coefficient by a maximum of 1.9%. The valve structure of the optimal swirl ratio combined with the dissimilitude scheme of the largest valve lift of the tangential inlet could increase the swirl ratio by a maximum of 9.7%. This study can guide diesel engines with combined intakes to increase the intake mass and improve the intake performance.

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Section: Influence Of the Valve Lift Dissimilitude On Intake Performancementioning

confidence: 99%

Influence of Intake Valve Structure Combined with Valve Lift Dissimilitude on Intake Performance of Diesel Engine

2023

JAFM

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“…The macro-parameter pollution contains eight parameters, namely air quality and pollution, soil pollution, noise pollution, fuel types and effects, coal transport and consumption, waste management, wastewater treatment, and incident and risk management. The transportation industry is responsible for around 30% of the greenhouse emissions that contribute to global warming [376]. In recent times, air pollution in transportation has become a major public concern.…”

Section: Pollutionmentioning

confidence: 99%

“…In [383], the authors analyze the factors which help to choose between ethanol and gasoline for the flex-fuel vehicles. Bayramo glu et al [376] analyze the valve lift effects on the diesel engine.…”

Section: Pollutionmentioning

confidence: 99%

Deep Journalism and DeepJournal V1.0: A Data-Driven Deep Learning Approach to Discover Parameters for Transportation

et al. 2022

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We live in a complex world characterised by complex people, complex times, and complex social, technological, economic, and ecological environments. The broad aim of our work is to investigate the use of ICT technologies for solving pressing problems in smart cities and societies. Specifically, in this paper, we introduce the concept of deep journalism, a data-driven deep learning-based approach, to discover and analyse cross-sectional multi-perspective information to enable better decision making and develop better instruments for academic, corporate, national, and international governance. We build three datasets (a newspaper, a technology magazine, and a Web of Science dataset) and discover the academic, industrial, public, governance, and political parameters for the transportation sector as a case study to introduce deep journalism and our tool, DeepJournal (Version 1.0), that implements our proposed approach. We elaborate on 89 transportation parameters and hundreds of dimensions, reviewing 400 technical, academic, and news articles. The findings related to the multi-perspective view of transportation reported in this paper show that there are many important problems that industry and academia seem to ignore. In contrast, academia produces much broader and deeper knowledge on subjects such as pollution that are not sufficiently explored in industry. Our deep journalism approach could find the gaps in information and highlight them to the public and other stakeholders.

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“…The Tier III regulation, which was put into effect on January 1, 2016, within the scope of IMO MARPOL Annex VI, has aimed to reduce NO X emissions from ships by 76% compared to Tier II (IMO 2022 ). There are many techniques such as changing engine combustion parameters, using alternative fuels, and integrating after-treatment systems to reduce NO X emissions from ship diesel engines (Gong et al 2017 ; Bayramoğlu et al 2019 ; Lu et al 2020 ; Bayramoğlu and Yılmaz 2021 ; Öztürk and Can 2022 ). SCR systems are one of the most effective techniques that reduce NO X emissions by 90%.…”

Section: Introductionmentioning

confidence: 99%

Reduction of the harmful NOx pollutants emitted from the ship engines using high-pressure selective catalytic reduction system

Bayramoğlu,

Yılmaz,

Nuran

2024

Environ Sci Pollut Res

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Various techniques are used to reduce harmful pollutants such as NOX emissions from ships. Selective catalyst reduction (SCR) systems are the most effective technique used to reduce NOX emissions. In this study, the effects of an SCR reactor on NOX emissions and performance in high-pressure selective catalytic reduction (HP-SCR) systems were investigated numerically. In numerical studies, the effects of SCR system diameter, output form, catalyst activation energy, mixing zone length, and location were investigated as parametric, and the most suitable system geometry was determined. The effects of geometric parameters and catalyst type on emission and performance such as NOX reduction, NH3 slip, velocity, and pressure loss were investigated. It was determined that with increasing system diameter, whereas the NOX reduction performance increased depending on exhaust velocity, the pressure drop decreased, and the most suitable system diameter was determined as 780 mm. Furthermore, the obtained results showed that the performance of NOX reduction decreased after 2 × 106 kJ/kmol activation energy, and the most suitable SCR output form was conical geometry. In terms of the environment, this study will contribute to achieving the UN Sustainable Development Goals such as climate action (SDG 13).

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Numerical investigation of valve lifts effects on performance and emissions in diesel engine

Cited by 10 publications

References 0 publications

Influence of Intake Valve Structure Combined with Valve Lift Dissimilitude on Intake Performance of Diesel Engine

Influence of Intake Valve Structure Combined with Valve Lift Dissimilitude on Intake Performance of Diesel Engine

Deep Journalism and DeepJournal V1.0: A Data-Driven Deep Learning Approach to Discover Parameters for Transportation

Reduction of the harmful NOx pollutants emitted from the ship engines using high-pressure selective catalytic reduction system

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