Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1621-1640 of 9564
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Parameter Identification of a Strongly Nonlinear Rotor-Bearing System Based on Reconstructed Constant Response Tests
(The American Society of Mechanical Engineers (ASME), 2020)A strongly nonlinear rotor-bearing system often has multiple solutions under harmonic excitations and jump phenomena. For example, a hardening nonlinearity may include a jump-down in the acceleration process and jump-up ... -
Experimental and Numerical Study of Supersonic Non-ideal Flows for Organic Rankine Cycle Applications
(The American Society of Mechanical Engineers (ASME), 2020)The organic Rankine cycle (ORC) is low-grade heat recovery technology, for sources as diverse as geothermal, industrial, and vehicle waste heat. The working fluids used within these systems often display significant real-gas ... -
Experimental Investigation and Simulation of a Boeing 747 Auxiliary Power Unit
(The American Society of Mechanical Engineers (ASME), 2020)Auxiliary power units (APUs) are a major driver of maintenance on civil aircraft. However, experimental data and performance simulations are rarely seen in public domain literature. While there is recourse to aircraft ... -
Effect of Rotation on Leakage and Windage Heating in Labyrinth Seals With Honeycomb Lands
(The American Society of Mechanical Engineers (ASME), 2020)One of the basic assumptions of the traditional labyrinth seal leakage calculation is that rotation has minimal or no effect on seal leakage. With the advancement of gas turbine technology, to achieve high performance, ... -
Analysis of Radial Compressor Performance at Low Pressure Ratios and Compressor Choke
(The American Society of Mechanical Engineers (ASME), 2020)Strong transient engine load steps can result in low pressure ratio (ΠC) compressor operation for single stage turbocharged (TC) systems. For conventional full load TC engine matching using one-dimensional (1D)-engine ... -
High-Momentum Jet Flames at Elevated Pressure, C: Statistical Distribution of Thermochemical States Obtained From Laser-Raman Measurements
(The American Society of Mechanical Engineers (ASME), 2020)A detailed investigation on flame structures and stabilization mechanisms of confined high momentum jet flames by one-dimensional (1D)-laser Raman measurements is presented. The flames were operated with natural gas (NG) ... -
Partially Premixed Flame Stabilization in the Presence of a Combined Swirl and Bluff Body Influenced Flowfield: An Experimental Investigation
(The American Society of Mechanical Engineers (ASME), 2020)Optical and laser diagnostic measurements in a nonpremixed model gas turbine (GT) burner have been performed to investigate the effect of an increase in thermal power on the flame stabilization. The model GT burner has a ... -
A Novel Single-Passage Transonic Wind Tunnel for Turbine-Vane Film Cooling
(The American Society of Mechanical Engineers (ASME), 2020)Wind-tunnel testing of turbines cascade is an important technique for quantifying the realistic conditions of turbine-vane film cooling. However, the complex and expensive facilities needed for the multipassage design of ... -
A Model-Guided Neural Network for the Prediction of Creep Behavior Under in-Service Conditions
(The American Society of Mechanical Engineers (ASME), 2020)Data-driven neural network methods have been widely applied for the prediction of stress–strain behavior, but have proven ill-suited for the extrapolation of time-dependent creep behavior. To overcome this problem, we ... -
Improving the Uncertainty of Exhaust Gas Temperature Measurements in Internal Combustion Engines
(The American Society of Mechanical Engineers (ASME), 2020)Accurate measurement of exhaust gas temperature (EGT) in internal combustion engines (ICEs) is a challenging task. The most common, and also the most practical, method of measurement is to insert a physical probe, for ... -
Study on Fuel and Injection Influence on a Spark Ignition Aeropiston Engine
(The American Society of Mechanical Engineers (ASME), 2020)Spark ignition aeropiston engines have good prospects due to light weight and high power to weight ratio. Both gasoline and kerosene can be utilized on these engines by using either traditional port fuel injection (PFI) ... -
Analysis of Shroud Cavity Leakage in a Radial Turbine for Optimal Operation in Compressed Air Energy Storage System
(The American Society of Mechanical Engineers (ASME), 2020)As an important energy generation device of the compressed air energy storage (CAES) system, the radial-inflow turbine with shrouded impeller is employed to avoid the leakage flow in the rotor, especially in the high-pressure ... -
Influence of Temperature Distribution on Radial Growth of Compressor Disks
(The American Society of Mechanical Engineers (ASME), 2020)For the next generation of aero-engines, manufacturers are planning to increase the overall compressor pressure ratio from the existing values around 50:1 to values of 70:1. The requirement to control the tight clearances ... -
Application of Active Subspace Method in Gas Exchange Strategy Calibration on a Variable Valve Timing Gasoline Engine
(The American Society of Mechanical Engineers (ASME), 2020)Modern internal combustion (IC) engines have complex configurations with many parameters to be tuned, and this system complication usually leads to a large amount of engine calibration experiments. In this study, the active ... -
The Effect of Inlet Swirl on Brush Seal Bristle Deflections and Stability
(The American Society of Mechanical Engineers (ASME), 2020)This paper considers three-dimensional (3D) computational fluid dynamics (CFD) and structural modeling of brush seals, and investigates the effects of inlet swirl on the bristle pack. The model couples aerodynamic forces ... -
Conceptual Flutter Analysis of Stepped Labyrinth Seals
(The American Society of Mechanical Engineers (ASME), 2020)A simple nondimensional model to describe the flutter onset of two-fin straight labyrinth seals (Corral and Vega, 2018, “Conceptual Flutter Analysis of Labyrinth Seals Using Analytical Models—Part I: Theoretical Background,” ... -
Review of Geometric Uncertainty Quantification in Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2020)Due to the manufacturing error and in-service degradation of gas turbines, there is always a deviation between the actual geometry and the design geometry. This geometric deviation has a prominent uncertainty characteristic, ... -
Influence of Annular/Pocket Groove on the Static and Rotordynamic Characteristics of Hole-Pattern Seals
(The American Society of Mechanical Engineers (ASME), 2020)Annular damper seals, such as hole-pattern seals, are widely used to control leakage and enhance rotordynamic stability in turbomachinery, especially, for the balance-piston seal in the straight-through multistage centrifugal ... -
Combustion Instabilities With Different Degrees of Premixedness in a Separated Dual-Swirl Burner
(The American Society of Mechanical Engineers (ASME), 2020)The effects of premixedness degrees on combustion instabilities of separated dual-swirl flames have been investigated experimentally in the Beihang Axial Swirler Independently Stratified (BASIS) burner. The degree of ... -
Visualization Research on Low-Temperature Ignition and Combustion Characteristics of Diesel/Gasoline Blends Under Cold-Start Conditions
(The American Society of Mechanical Engineers (ASME), 2020)Although engines fueled with diesel/gasoline blends show excellent combustion and emission performance, its low-temperature flame development characteristics under cold-start conditions remain to be further verified. To ...