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RISApplication of a Phenomenological Model for the Engine Out Emissions of Unburned Hydrocarbons in Driving Cycles
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this work, the application of a phenomenological model to determine engineout hydrocarbon (HC) emissions in driving cycles is presented. The calculation is coupled to a physicalbased simulation environment consisting ...
A Hybrid, Runtime Coupled Incompressible CFD-CAA Method for Analysis of Thermoacoustic Instabilities
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Thermoacoustic instabilities in gas turbine engines are of increasing interest for design of future low-emission technology combustors. Numerical methods used to predict thermoacoustic instabilities often employ either ...
Large Eddy Simulation of Soot Formation in a Real Aero-Engine Combustor Using Tabulated Chemistry and a Quadrature-Based Method of Moments
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Considering the increasingly stringent targets for aircraft emissions, computational fluid dynamics (CFD) is becoming a viable tool for improving future aero-engine combustors. However, predicting pollutant formation remains ...
An Extended Artificially Thickened Flame Model for Turbulent Hydrogen and Hydrogen-Enriched Flames With Intrinsic Instabilities Under Gas Turbine Relevant Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. Hydrogen and hydrogen blends with ammonia or natural gas are cornerstones in the transition to future environmentally friendly energy systems, such as gas turbines and aero-engines. However, hydrogen's unique ...
Development and Assessment of Dual-Fuel Capabilities in Next-Generation Aero-Engine Injectors for Hydrogen and Liquid Fuels
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. Dual-fuel (DF) aero-engines, capable of using hydrogen alongside sustainable aviation fuel (SAF) or kerosene as a fuel, would be a key enabler in the transition to hydrogen operation but have received limited ...
A Quasi dimensional Model of the Ignition Delay for Combustion Modeling in Spark Ignition Engines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Quasidimensional (QD) modeling of combustion in sparkignition (SI) engines allows to describe the most relevant processes of heat release. Here, a submodel for the ignition delay is introduced and applied. The start of ...
Assessment of a Hybrid LES-CAA Method for Predicting Flame Responses in Swirl-Stabilized Combustion Under Various Acoustic Excitations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. Thermoacoustic instabilities present a significant challenge in modern combustion systems due to the complex and potentially harmful interactions between unsteady heat release, acoustics, and flow dynamics. In ...
Numerical Investigation of Effusion Cooling Air Influence on the CO Emissions for a Single-Sector Aero-Engine Model Combustor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Stricter aviation emissions regulations have led to the desire for lean-premixed-vaporized (LPP) combustors over rich–quench–lean (RQL) burners. While this operation mode is beneficial for reducing NOx and particulate ...
Exploring Soot Pathways: High-Fidelity Large Eddy Simulation Investigation of Soot Formation and Oxidation in Rich–Quench–Lean Combustion Systems Under Real Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. Developing low-emission aero-engines presents a critical step in meeting near-term climate goals. A particular challenge is accurate soot predictions with computational fluid dynamics (CFD), where the integration ...
Two-Phase Flow Simulations of Liquid/Gas Transport in Radial Centrifugal Pumps With Special Emphasis on the Transition From Bubbles to Adherent Gas Accumulations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In recent optical flow experiments on a transparent volute-type radial centrifugal pump, an accumulation of air bubbles to adherent gas pockets within the impeller blade channels was observed. A transition of unsteady ...