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RISEurasian Cold Air Outbreaks under Different Arctic Stratospheric Polar Vortex Strengths
Publisher: American Meteorological Society
Abstract: AbstractThis study analyzes the differences and similarities of Eurasian cold air outbreaks (CAOs) under the weak (CAOW), strong (CAOS), and neutral (CAON) stratospheric polar vortex states and examines the potential links ...
Experimental Investigation of Combustion Characteristics of a Single Cylinder Diesel Engine at Altitude
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Concern over the change of atmospheric conditions at high altitudes prompted interests in the deteriorated efficiency and emissions from heavy-duty diesel engines. This study utilized a single-cylinder, four-stroke, direct ...
Investigation of the Effect of Simulated Atmospheric Conditions at Different Altitudes on the Combustion Process in a Heavy-Duty Diesel Engine Based on Zero-Dimensional Modeling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Plateau diesel engines suffer from increased fuel consumption and deteriorating emissions. These problems were mainly caused by the combustion worsening inside the chamber. However, limited research has been done specifically ...
Machine Learning Assisted Analysis of an Ammonia Engine Performance
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Currently, the interest in utilizing ammonia in internal combustion engines stems from the trend toward decarbonization, as ammonia is a zero-carbon footprint fuel. Existing studies on ammonia engines are limited and most ...
Investigation of Multistage Combustion Inside a Heavy-Duty Natural-Gas Spark-Ignition Engine Using Three-Dimensional Computational Fluid Dynamics Simulations and the Wiebe-Function Combustion Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The conversion of existing heavy-duty diesel engines to lean natural-gas (NG) spark ignition can be achieved by replacing the diesel injector with a spark plug and fumigating the NG into the intake manifold. While the ...
Limitations of Natural Gas Lean Burn Spark Ignition Engines Derived From Compression Ignition Engines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Converting existing diesel engines to the spark ignition (SI) operation can increase the utilization of natural gas (NG) in heavy-duty applications, which can reduce oil imports in the US and curtail greenhouse-gas emissions. ...
Numerical Investigation of the Intercooler Performance of Aircraft Piston Engines Under the Influence of High Altitude and Cruise Mode
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Multistage supercharging is an effective way to solve the problems of low volumetric efficiency and combustion deterioration of piston engines under high altitude conditions. As a critical component of the supercharger ...
Investigation of the Effect of Altitude on In-Cylinder Heat Transfer in Heavy-Duty Diesel Engines Based on an Empirical Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Diesel engines are the predominant power source for the trucking industry. Heavy-duty trucks carry more than 70% of all goods transported across the United States. Atmospheric conditions vary with altitude but are critical ...
Improved Thermodynamic Model for Lean Natural Gas Spark Ignition in a Diesel Engine Using a Triple Wiebe Function
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The use of natural gas (NG) in heavy-duty internal combustion engines can reduce the dependence on petroleum fuels and greenhouse gas emissions. Diesel engines can convert to NG spark ignition (SI) by installing a high-energy ...
Classifying Urban Functional Zones by Integrating the Homogeneity and Structural Similarity of POIs
Publisher: American Society of Civil Engineers
Abstract: The classification of urban functional zones helps to understand the spatial structure of urban functions. However, achieving high classification accuracy is challenging, because of the complexity and randomness of urban ...