Dear Colleagues,

In the last decade, more stringent regulations have forced a significant reduction in the levels of pollutants emitted into the atmosphere; nevertheless, internal combustion engines and gas turbines still represent the most widely operated energy conversion systems. Experimental investigations play a fundamental role in allowing better understanding and limiting of the processes that are responsible for noxious species formation. Indeed, only experimental activities can provide basic data to deeply analyze the phenomena occurring inside combustion chambers.

On the other hand, experimental facilities require high cost of maintenance and operation and, therefore, the same data can be used in the validation of numerical models. The latter are helpful to predict the behavior of engines and gas turbines under a wide range of operating conditions or to test their operation in innovative combustion concepts.

For this Special Issue, we invite you to submit papers involving combustion computational models and their methodologies of validation, covering a wide range of applications and solutions.

Some of the topics of interest for publication include but are not limited to:

• Compression ignition engines
• Spark ignition engines
• Gas turbines
• Experimental data processing and analysis
• Combustion modeling
• Model validation
• Computational fluid dynamics
• 0D/1D codes
• Innovative fuels
• Innovative combustion concepts

Papers submitted to this Special Issue will be selected after a rigorous peer review procedure with the aim of rapid and wide dissemination of research results, developments, and applications.

Prof. Dr. Maria Cristina Cameretti
Dr. Roberta De Robbio
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• modeling
• experimental data
• internal combustion engines
• gas turbines
• combustion
• CFD
• 0D/1D codes

• Computational and Data-Driven Modeling of Combustion in Reciprocating Engines or Gas Turbines in Energies (10 articles)

Title: Experimental and numerical analyses of exhaust emissions in a low-speed two-stroke marine diesel engine
Authors: Branko Lalić; Petar Vrvilo; Zdeslav Jurić
Affiliation: 1. Faculty of Maritime Studies, University of Split, University of Split, Split, Croatia 2. Faculty of Maritime Studies, University of Split, University of Split, Split, Croatia 3. Faculty of Maritime Studies, University of Split, University of Split, Split, Croatia
Abstract: Abstract: Knowing the process of generating exhaust emissions and determining influential parameters are important factors in improving two-stroke slow-speed marine engines, particularly for further fuel consumption reduction and stringent regulations on the limitation of harmful emissions. So far, research in techniques and emissions reduction methods has revealed that there are economic and technical problems with the application of the developed technologies to marine propulsion engines, which calls implementation and fulfillment of strict legal regulations into question.       A model of a marine slow-speed two-stroke diesel engine has been developed and experimental and numerical analyses of the emission gasses formations were carried out. The model fuels and combustion stoichiometry, kinematics of the piston mechanism, developed temperature in the cylinder, change release heat and formation of nitrogen monoxide have been thoroughly elaborated. The most significant parameters for the formation of emissions such as nitrogen monoxide have been determined. Model validation was performed based on measured combustion pressures, engine power and concentrations of nitrogen oxides, carbon monoxide carbon dioxide at different engine loads. The possibilities of fuel consumption optimization and reduction of nitrogen monoxide emissions by correcting the most significant influencing parameters were examined. The developed model can be used to determine the exhaust emissions of engines operating with different fuels.