Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1601-1620 of 9564
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Discussion of “Non-Axisymmetric Flows and Rotordynamic Forces in an Eccentric Shrouded Centrifugal Compressor—Part 1: Measurement” (Song, J., Kim, S., Park, T. C., Cha, B.-J., Lim, D. H., Hong, J. S., Lee, T. W., and Song, S. J., ASME J. Eng. Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2020)My commendations to the authors for this long-awaited (and greatly needed) contribution regarding measured direct and cross-coupled stiffness (Kxy) coefficients of a centrifugal–compressor impeller. As noted by the authors, ... -
Examination of Predictive Flame Extinction Boundaries for Bluff Body Stabilized Flames at Elevated Temperature and Pressure Conditions
(The American Society of Mechanical Engineers (ASME), 2020)A correlation for the prediction of flame lean extinction limits for premixed combustion systems by Sullivan-Lewis and McDonell is examined. The correlation was developed with the data collected from Sullivan-Lewis' ... -
A Computational Model for the Analysis of the Static Forced Performance of Self-Equalizing Tilting Pad Thrust Bearings
(The American Society of Mechanical Engineers (ASME), 2020)While failure analyses in the archival literature report thrust collar misalignment as a major cause of collapse in oil lubricated thrust bearings (TB), a self-equalizing tilting pad thrust bearing (TPTB) improves operation ... -
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
(The American Society of Mechanical Engineers (ASME), 2020)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 ... -
Analysis of Different Uniflow Scavenging Options for a Medium-Duty 2-Stroke Engine for a U.S. Light-Truck Application
(The American Society of Mechanical Engineers (ASME), 2020)The work presented here seeks to compare different means of providing uniflow scavenging for a 2-stroke engine suitable to power a U.S. light-duty truck. Through the “end-to-end” nature of the uniflow scavenging process, ... -
Effects of Fuel Staging on the Hydrodynamic Stability of Multinozzle Swirl Flows
(The American Society of Mechanical Engineers (ASME), 2020)Hydrodynamic instability in lean premixed gas turbine combustors can cause coherent flow velocity oscillations. These can in turn drive heat release oscillations that when favorably coupled with combustor acoustic modes ... -
Tradeoff Assessments for Part Load Controlled Cooling Air in Stationary Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2020)The demand for flexible part load operation of stationary gas turbines requires the simultaneous design for sufficient efficiency and lifetime. Both can be addressed by the secondary air system. This paper presents ... -
Soot Emission Simulations of a Single Sector Model Combustor Using Incompletely Stirred Reactor Network Modeling
(The American Society of Mechanical Engineers (ASME), 2020)The simulation of soot evolution is a problem of relevance for the development of low-emission aero-engine combustors. Apart from detailed CFD approaches, it is important to also develop models with modest computational ... -
Usage of Data Provenance Models in Collaborative Multidisciplinary Aero-Engine Design
(The American Society of Mechanical Engineers (ASME), 2020)The collaborative multidisciplinary design of aircraft engines is a complex and highly iterative process. An essential characteristic of this design process is the involvement of a large number of experts from different ... -
Loss Mechanism of Low-Pressure Turbine Secondary Flows Due to Different Incoming Boundary Layers
(The American Society of Mechanical Engineers (ASME), 2020)In high bypass ratio engines, the flow exits the interturbine duct (ITD) and enters the low-pressure (LP) turbine. This paper aims to understand the effects of the boundary layer at the exit of ITD on the endwall secondary ... -
Experimental Study on the Film-Cooling Characteristics of the Cylindrical Holes Embedded in Sine-Wave Shaped Trench
(The American Society of Mechanical Engineers (ASME), 2020)An experimental investigation has been performed to study the film-cooling performance of the cylindrical holes embedded in the sine-wave-shaped-trench. The sine-wave-shaped-trench is obtained by changing the trailing edge ... -
Real-Time Diagnostic Method of Gas Turbines Operating Under Transient Conditions in Hybrid Power Plants
(The American Society of Mechanical Engineers (ASME), 2020)The expansion of renewable power plants has transformed the role and operation of gas turbines to a great extent. From the base load operation era, we are moving into a flexible and dynamic engine operation of gas turbines. ... -
Oil Brush Seals in Turbomachinery: Flow Analyses and Closed-Form Solutions
(The American Society of Mechanical Engineers (ASME), 2020)Brush seals are one of the most important dynamic seals used in oil and oil mist applications in industrial turbines and aviation. Flexible bristle structure is the main structural superiority of brush seals, which enables ... -
In-Cylinder Temperature Measurements in a 55-cm3 Two-Stroke Engine Via Tunable Laser Absorption Spectroscopy
(The American Society of Mechanical Engineers (ASME), 2020)In-cylinder temperature is a critical quantity for modeling and understanding combustion dynamics in internal combustion engines (ICEs). It is difficult to measure in small, two-stroke engines due to high operational speeds ... -
Numerical Investigation of Combustion Instabilities in a Single-Element Lean Direct Inject Combustor Using Flamelet Based Approaches
(The American Society of Mechanical Engineers (ASME), 2020)In this paper, high-fidelity large eddy simulations (LES) along with flamelet-based combustion models are assessed to predict combustion dynamics in low-emission gas turbine combustor. A model configuration of a single-element ... -
Influence of an Additional Indexing Rotary Axis on Wire Electrical Discharge Machining Performance for the Automated Manufacture of Fir Tree Slots
(The American Society of Mechanical Engineers (ASME), 2020)The demand for higher efficiency in aircraft propulsion engines leads to materials with increasing thermomechanical strengths and new designs inducing filigree geometries of blisks and disks. Because of new designs which ... -
An Accurate Linearization of Electromagnetic Force of Heteropolar Magnetic Bearings With Redundant Structures
(The American Society of Mechanical Engineers (ASME), 2020)Fault tolerance is one of the practical and effective approaches to improve the reliability of magnetic bearings. The linearization of the electromagnetic force (EMF) from the redundant structures is the crucial basis of ... -
Preliminary Design and Performance Assessment of an Underwater Compressed Air Energy Storage System for Wind Power Balancing
(The American Society of Mechanical Engineers (ASME), 2020)A key approach to large renewable power management is based on implementing storage technologies, including batteries, power-to-gas, and compressed air energy storage (CAES). This work presents the preliminary design and ... -
Passive Suppression of Self-Excited Combustion Instabilities in Liquid Spray Flame Using Microperforated Plate
(The American Society of Mechanical Engineers (ASME), 2020)This paper presents an experimental investigation of using a microperforated plate (MPP) backed by an adjustable cavity to mitigate the combustion instabilities of liquid fuel swirl flame. The acoustic properties of MPPs ... -
Validation of Analytical Model for Turboelectric Power System for Preliminary Design Purposes
(The American Society of Mechanical Engineers (ASME), 2020)Small, electrically powered, unmanned aircraft are limited in the range and endurance due to inherently low energy density of batteries, prompting the development of hybrid gaselectric power systems. Turbo-electric power ...