Browsing by Author "Ahmed, Samer F."
Now showing items 1-12 of 12
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Autoignition of n-heptane in a turbulent co-flowing jet
Tarek, Echekki; Ahmed, Samer F. ( Elsevier , 2015 , Article)N-heptane autoignition in turbulent co-flowing jets with preheated air is studied using the one-dimensional turbulence (ODT) model. The simulations are designed to investigate the effects of molecular and turbulent transports ... -
Combustion and emissions of a gas-to-liquid diesel engine utilizing optimized spiral-helical intake manifold designs
Abdellatif, Yasser M.; Saker, Ahmad T.; Elbashir, Aboubaker M.; Ahmed, Samer F. ( American Society of Mechanical Engineers (ASME) , 2021 , Article)Two simultaneous strategies were used to reduce diesel engine emissions. Optimized manifold designs were used with gas-to-liquid (GTL) fuel and its blend with diesel fuel. Six new spiral-helical manifolds were tested, which ... -
Dataset for transient 3D simulations of turbulent premixed flames of Gas-to-Liquid (GTL) fuel
Abdellatif M., Sadeq; Ahmed, Samer F.; Sleiti, Ahmad K. ( Elsevier , 2021 , Other)A fan-stirred combustion vessel is used to study the premixed turbulent combustion of diesel, Gas to Liquids (GTL) and 50/50 diesel-GTL and to generate these datasets. A numerical simulation approach is implemented for ... -
Development of an Air-Cooled Induction Manifold for Diesel Engines in Hot and Humid Climate
Elrentisy, Mohamed H.; Abdellatif, Yasser M.; Elbashir, Aboubaker M.; Ahmed, Samer F. ( American Society of Mechanical Engineers (ASME) , 2022 , Article)Extreme weather conditions in the Gulf, Qatar, have been taken as an example in this study, tend to be hot and humid mostly throughout the year, especially in the summer. Such weather negatively affects the performance and ... -
Effect of Utilizing a Novel Intake Manifold Design on Smoke Emissions and Particulate Size Distributions of a Gas-to-Liquid Diesel Engine
Elbashir, Aboubaker M.; Saker, Ahmad T.; Ahmed, Samer F. ( American Society of Mechanical Engineers (ASME) , 2021 , Article)Smoke emissions and particulate matter (PM) size distributions were investigated on a direct-injection (DI) single-cylinder diesel engine running on both gas-to-liquid (GTL) and diesel fuels utilizing a novel spiral-helical ... -
An experimental and numerical investigation of the effects of the diaphragm pressure ratio and its position on a heated shock tube performance
Badri, Yousif; Elbashir, Aboubaker; Saker, Ahmad; Ahmed, Samer F. ( Wiley-Blackwell , 2022 , Article)The main purpose of this work was to investigate the performance of heated shock tube (ST) with different pressure ratios and diaphragm positions numerically and experimentally. The numerical model was developed to simulate ... -
Investigating the Potential of Recycling Flare-Source Hydrocarbon Gases in an Industrial Burner
Mohamed, Fahd M.; Eljack, Fadwa T.; Ahmed, Samer F.; Ghani, Saud A. ( American Society of Mechanical Engineers (ASME) , 2021 , Article)Flare gas is considered a global environmental concern. Flaring contributes to wasting limited material and energy resources, economic loss, and greenhouse gas emissions. Utilizing flared gas as a fuel feed to industrial ... -
Measurements of laminar flame speeds of alternative gaseous fuel mixtures
Ibrahim, Ahmed S.; Ahmed, Samer F. ( American Society of Mechanical Engineers (ASME) , 2015 , Article)Global warming and the ever increasing emission levels of combustion engines have forced the engine manufacturers to look for alternative fuels for high engine performance and low emissions. Gaseous fuel mixtures such as ... -
Modelling of multiple biodiesel-emitted nitrogen oxides using ANN approach
Siraj, Sayyed; Kumar Das, Randip; Ahmed, Samer F.; Kulkarni, Kishor; Alam, Tabish; Eldin, Sayed M.... more authors ... less authors ( Elsevier , 2023 , Article)This research paper focuses on modelling of nitrogen oxides emitted by diesel engine for multiple biodiesel blends. A lot of research work has observed that the properties of biodiesel blends affect the nitrogen oxide ... -
Transient 3D simulations of turbulent premixed flames of gas-to-liquid (GTL) fuel in a fan-stirred combustion vessel
Abdellatif M., Sadeq; Ahmed, Samer F.; Sleiti, Ahmad K. ( Elsevier , 2021 , Article)This work aims to conduct turbulent flame studies of GTL fuel and 50/50 diesel-GTLblend and compare them to diesel under a wide range of equivalence ratio (0.7 < Ф < 1.3) and turbulence intensities (0.5 m/s < u′ < 3.0 m/s). ... -
Turbulence effects on the autoignition of DME in a turbulent co-flowing jet
Tarek, Echekki; Ahmed, Samer F. ( Elsevier , 2017 , Article)Dimethyl ether (DME) autoignition in turbulent co-flowing jets with preheated air is studied using the one-dimensional turbulence (ODT) model. We investigate the effects of molecular and turbulent transport on the autoignition ... -
Turbulent Flames in Enclosed Combustion Chambers: Characteristics and Visualization - A Review
Sadiq, Abdellatif M.; Sleiti, Ahmad K.; Ahmed, Samer F. ( American Society of Mechanical Engineers (ASME) , 2020 , Article)Remarkable progress has been achieved in measuring the flame propagation rate accurately under laminar conditions, which can be used to predict turbulent flame propagation rates using some correlations fitted to experimental ...