Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2421-2440 of 9564
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Jet Engine Gas Path Analysis Based on Takeoff Performance Snapshots
(The American Society of Mechanical Engineers (ASME), 2017)Current engine condition monitoring (ECM) systems for jet engines include the analysis of on-wing gas path data using steady-state performance models. Such data, which are also referred to as performance snapshots, usually ... -
Impact of a Yttria-Stabilized Zirconia Thermal Barrier Coating on HCCI Engine Combustion, Emissions, and Efficiency
(The American Society of Mechanical Engineers (ASME), 2017)In-cylinder surface temperature has significant impacts on the thermo-kinetics governing the homogeneous charge compression ignition (HCCI) process. Thermal barrier coatings (TBCs) enable selective manipulation of combustion ... -
The Impact of Low Octane Primary Reference Fuel on HCCI Combustion Burn Rates: The Role of Thermal Stratification
(The American Society of Mechanical Engineers (ASME), 2017)A new experimental method was developed which isolated charge composition effects for wide levels of internal exhaust gas recirculation (iEGR) at constant total EGR (tEGR) for homogeneous charge compression ignition (HCCI) ... -
Rapidly Pulsed Reductants for Diesel NOx Reduction With Lean NOx Traps: Comparison of Alkanes and Alkenes as the Reducing Agent
(The American Society of Mechanical Engineers (ASME), 2017)Lean NOx traps (LNTs) are often used to reduce NOx on smaller diesel passenger cars where urea-based selective catalytic reduction (SCR) systems may be difficult to package. However, the performance of LNTs at temperatures ... -
Supercharging the Double-Fueled Spark Ignition Engine: Performance and Efficiency
(The American Society of Mechanical Engineers (ASME), 2017)Internal combustion engine development focuses mainly on two aspects: fuel economy improvement and pollutant emissions reduction. As a consequence, light duty spark ignition (SI) engines have become smaller, supercharged, ... -
Observer-Based Cylinder Air Charge Estimation for Spark-Ignition Engines
(The American Society of Mechanical Engineers (ASME), 2017)Spark-ignition engine in-cylinder air charge estimation is important for air-to-fuel ratio (AFR) control, maintaining high after-treatment efficiency, and determination of current engine torque. Current cylinder air charge ... -
Three-Dimensional Computational Fluid Dynamics Modeling and Validation of Ion Current Sensor in a Gen-Set Diesel Engine Using Chemical Kinetic Mechanism
(The American Society of Mechanical Engineers (ASME), 2017)Ion current sensing is a low-cost technology that can provide a real-time feedback for the in-cylinder combustion process. The ion current signal depends on several design parameters of the sensing probe in addition to the ... -
Inverse Analysis of In-Cylinder Gas-Wall Boundary Conditions: Investigation of a Yttria-Stabilized Zirconia Thermal Barrier Coating for Homogeneous Charge Compression Ignition
(The American Society of Mechanical Engineers (ASME), 2017)Thermal barrier coatings (TBCs) applied to in-cylinder surfaces of a low temperature combustion (LTC) engine provide an opportunity for enhanced efficiency via two mechanisms: (i) positive impact on thermodynamic cycle ... -
Using a Bowed Blade to Improve the Supersonic Flow Performance in the Nozzle of a Supersonic Industrial Steam Turbine
(The American Society of Mechanical Engineers (ASME), 2017)For solar plants, waste-energy recovery, and turbogenerators, there is a considerable amount of waste energy due to low mass flow rate. Owing to the high specific power output and large pressure ratios across the turbine, ... -
Particulate Matter Emission Suppression Strategies in a Turbocharged Gasoline Direct-Injection Engine
(The American Society of Mechanical Engineers (ASME), 2017)The development process of a down-sized turbocharged gasoline direct-injection (GDI) engine/vehicle was partially introduced with the focus on particulate matter (PM)/particle number (PN) emission reduction. To achieve ... -
Effect of Shroud and Orientation Angles of Inlet Valve on Flow Characteristic Through Helical–Spiral Inlet Port in Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2017)The in-cylinder airflow motion is an important factor that severely affects combustion efficiency and emissions in diesel engines. It is greatly affected by the inlet port and valve geometries. A diesel engine cylinder ... -
Effects of Fuel Quantity on Soot Formation Process for Biomass-Based Renewable Diesel Fuel Combustion
(The American Society of Mechanical Engineers (ASME), 2017)Soot formation process was investigated for biomass-based renewable diesel fuel, such as biomass to liquid (BTL), and conventional diesel combustion under varied fuel quantities injected into a constant volume combustion ... -
Model Testing of a Series of Counter-Rotating Type Horizontal-Axis Tidal Turbines With 500 mm Diameter
(The American Society of Mechanical Engineers (ASME), 2017)Tidal current energy shows great attractive as it stores an enormous amount of predictable sustainable resource that can be extracted and used for the purpose of commercial power generation. The horizontal-axis tidal turbine ... -
Simulation of Combustion Recession After End-of-Injection at Diesel Engine Conditions
(The American Society of Mechanical Engineers (ASME), 2017)Recent experimental observations show that lifted diesel flames tend to propagate back toward the injector after the end-of-injection (EOI) under conventional high-temperature conditions. The term “combustion recession” ... -
Symbolic Time-Series Analysis of Gas Turbine Gas Path Electrostatic Monitoring Data
(The American Society of Mechanical Engineers (ASME), 2017)The aero-engine gas-path electrostatic monitoring system is capable of providing early warning of impending gas-path component faults. In the presented work, a method is proposed to acquire signal sample under a specific ... -
Ejector Application for Scavenging of an Aero Engine Bearing Chamber
(The American Society of Mechanical Engineers (ASME), 2017)Oil system architecture in aero engines has remained almost the same for the last 35 years. At least one mechanically-driven oil feed pump is responsible for distributing pressurized oil into the bearing chambers and several ... -
Analytical Study of Articulating Turbine Rotor Blade Concept for Improved Off-Design Performance of Gas Turbine Engines
(The American Society of Mechanical Engineers (ASME), 2017)Gas turbine engines are generally optimized to operate at nearly a fixed speed with fixed blade geometries for the design operating condition. When the operating condition of the engine changes, the flow incidence angles ... -
Prechamber Equipped Laser Ignition for Improved Performance in Natural Gas Engines
(The American Society of Mechanical Engineers (ASME), 2017)Lean-burn operation of stationary natural gas engines offers lower NOx emissions and improved efficiency. A proven pathway to extend lean-burn operation has been to use laser ignition (LI) instead of standard spark ignition ... -
Experimental Investigation of Endwall Heat Transfer With Film and Impingement Cooling
(The American Society of Mechanical Engineers (ASME), 2017)The switch from diffusive combustion to premixed combustion in a modern gas turbine changes the combustor exit temperature profile to a more uniform one. This will directly affect the cooling of the first stage vane ... -
Effect of Rotation on a Gas Turbine Blade Internal Cooling System: Experimental Investigation
(The American Society of Mechanical Engineers (ASME), 2017)A detailed aerothermal characterization of an advanced leading edge (LE) cooling system has been performed by means of experimental measurements. Heat transfer coefficient distribution has been evaluated exploiting a ...