YaBeSH Digital Library: Recent submissions
Now showing items 10721-10740 of 316660
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Characterization of Knocking Pressure Data From Two Closely Spaced Transducers: Effect of Transducer Mounting
(The American Society of Mechanical Engineers (ASME), 2025)In this study, pressure data acquired simultaneously from two different, closely spaced pressure transducers were compared to understand the quantification of knock intensity. The comparison between four different transducer ... -
Image-Based Flashback Detection in a Hydrogen-Fired Gas Turbine Using a Convolutional Autoencoder
(The American Society of Mechanical Engineers (ASME), 2025)Flame flashback (FB) is a major concern in hydrogen-fired gas turbines. In order to determine the flashback propensity of a hydrogen burner, several burner design tests at different operating points and fuel blends are ... -
In-Cylinder Imaging and Emissions Measurements of Cold-Start Split Injection Strategies
(The American Society of Mechanical Engineers (ASME), 2025)Strategies to mitigate cold-start emissions are critical to meet stringent standards for particulate and regulated gaseous emissions from direct injection spark ignition (DISI) engines. The objective of the current work ... -
Effects of Acid Etching on the Microstructure and Stiffness of Human Teeth
(The American Society of Mechanical Engineers (ASME), 2024)The mechanical properties of acid-etched enamel and dentin are important for understanding tooth erosion and developing innovative dental restorative materials. In this study, the microstructure and mechanical properties ... -
Experimental Identification of Blade Tip Rub Forces at Engine Relevant Temperatures and Speeds
(The American Society of Mechanical Engineers (ASME), 2024)Abradable casing liners are used to safely minimize the clearance between rotating turbomachinery blades and outer casings. Reduced clearance improves engine efficiency but can lead to more blade tip rub events. These blade ... -
Analysis of the Flow-Field Distortions Induced by Pneumatic Pressure Probes in Test Bench Experiments on Centrifugal Compressors: Are We Testing Right?
(The American Society of Mechanical Engineers (ASME), 2024)Experimental testing at the test rig still plays a key role in the development of new centrifugal compressor designs for industrial applications. Although a wide set of different probes is used as per common practice, the ... -
Effect of Piston Ring Grooves on the Radial and Tangential Forces of a Squeeze Film Damper
(The American Society of Mechanical Engineers (ASME), 2024)Squeeze film dampers (SFDs) are components of rotating machinery used to reduce vibration amplitudes and improve the rotor dynamic stability. Piston rings (PRs) are often employed as end seals for SFDs. They enhance the ... -
Design, Analysis, and Testing of an Additively Manufactured Catalytic Combustor for a Micro-Wave Rotor Turbine
(The American Society of Mechanical Engineers (ASME), 2024)In this paper, an additively manufactured (AM) Inconel catalytic combustor was tested in combination with a microwave rotor turbine with nonaxial channels designed for shaft power extraction. This was done in an open-loop ... -
Model Order Determination for Modal Parameter Estimation: Application to a Composite Fan Stage
(The American Society of Mechanical Engineers (ASME), 2024)Experimental methods are necessary to quantify structural damping. Among these methods, modal testing of bladed disks is of particular interest because it provides an efficient experimental characterization of these ... -
The Impact of Pad Elasticity on Frequency-Dependent Linear Dynamic Coefficients of Tilting-Pad Journal Bearings
(The American Society of Mechanical Engineers (ASME), 2024)The frequency-dependent dynamic coefficients of tilting-pad bearings are significantly influenced by the pad pivot elasticity. In addition to the elasticity of the pivot, there is also the flexibility of the structure that ... -
The Effect of Additive “Depositional” Reprofiling of Compressor Blade Leading Edges on Engine Performance
(The American Society of Mechanical Engineers (ASME), 2024)A common problem for gas turbine engines after ingesting atmospheric dust is compressor fouling, where small particles adhere to component surfaces. By sampling components from both a test engine and a service engine, ... -
Interplay Between Unburned Emissions and NOx Emissions From a Dual Swirl Hydrogen Air Injector
(The American Society of Mechanical Engineers (ASME), 2024)OH planar laser induced fluorescence (OH-PLIF) and particle image velocimetry (PIV) are employed to analyze the structure of hydrogen/air flames stabilized by a dual swirl injection system under globally lean and atmospheric ... -
Field Performance Testing and Test Codes for Gas Compressors
(The American Society of Mechanical Engineers (ASME), 2024)Field testing of gas compressor packages requires the accurate determination of efficiency, capacity, head, and power in sometimes less than ideal working environments. The results of field tests have significant implications ... -
Rotordynamics of a Single-Stage Brush Seal in Isolation: The Effects of Variable Stiffness and Back Plate Geometry
(The American Society of Mechanical Engineers (ASME), 2024)Brush seals control leakage around rotating components from areas of high to low pressure inside turbomachinery. They are known to contribute to the overall stability of gas turbines, therefore their dynamic behavior is ... -
Comparison of Laminar and Turbulent K–Omega Shear Stress Transport Models Under Realistic Boundary Conditions Using Clinical Data for Arterial Stenosis
(The American Society of Mechanical Engineers (ASME), 2024)Early diagnosis of cardiovascular diseases (CVDs), including arterial stenosis, enables targeted treatments that reduce CVD mortality. It is vital to improve the accuracy of early diagnostic tools. Current computational ... -
On Leakage Flows in a Liquid Hydrogen Multistage Pump for Aircraft Engine Applications
(The American Society of Mechanical Engineers (ASME), 2024)A comprehensive operational characterization of a representative, liquid hydrogen (LH2) aircraft engine pump, a key enabler for future hydrogen aviation, is presented in this work. The implications of leakage flows are ... -
Dynamic Performance Analysis of a Turbocharged PEMFC System
(The American Society of Mechanical Engineers (ASME), 2024)Proton-exchange membrane fuel cell (PEMFC) systems are one of the most promising technologies for the decarbonization of the transportation and power sectors. This article investigates the dynamics of an innovative ... -
Cooling System of a High-Pressure Centrifugal Compressor: Development and Impact on Wheel Temperatures
(The American Society of Mechanical Engineers (ASME), 2024)High power density, low fuel consumption, and a compact design with competitive total costs of ownership are key requirements for internal combustion engines for conventional fuels and carbon-free or carbon-neutral future ... -
Bayesian Data Assimilation in Cold Flow Experiments on an Industrial Thermoacoustic Rig
(The American Society of Mechanical Engineers (ASME), 2024)We assimilate experimental data from nonreacting flow in the SCARLET (SCaled Acoustic Rig for Low Emission Technologies) test rig using physics-based Bayesian inference. We model the complex geometry of the combustor with ... -
Inferring Flame Transfer Functions of Turbulent Conical Flames From Pressure Measurements
(The American Society of Mechanical Engineers (ASME), 2024)We use approximate Bayesian inference, accelerated by adjoint methods, to construct a quantitatively accurate model of the thermoacoustic behavior of a weakly turbulent conical flame in a duct. We first perform a series ...