YaBeSH Digital Library: Recent submissions
Now showing items 13921-13940 of 316660
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Laser-Structured Thin Film Sensor Technology for Sliding Bearings in Internal Combustion Engines
(The American Society of Mechanical Engineers (ASME), 2024)Global issues such as climate change, environmental pollution, and conservation of resources require manufacturers of internal combustion engines (ICE) to achieve substantially reduced emissions of greenhouse gases and ... -
Effect of Insert Porosity on Combustion Instability in a Lean Premixed Combustor Analyzed by a Proper Orthogonal Decomposition-Based Phase Reconstruction Technique
(The American Society of Mechanical Engineers (ASME), 2024)Lean premixed (LPM) combustion is very effective at mitigating emissions but is vulnerable to strong thermoacoustic instabilities. A porous insert in the shape of an annular ring placed at the dump plane of the combustor ... -
Large-Eddy Simulation Study of Injector Geometry and Parcel Injection Location on Spray Simulation of the Engine Combustion Network Spray G Injector
(The American Society of Mechanical Engineers (ASME), 2024)Recent improvements in computing power and numerical techniques have enabled us resolve minute details of spray plume behavior and its wall boundary interactions, and made detailed spray simulations using large-eddy ... -
Condenser Retrofit in Leibstadt Nuclear Power Plant (Boiling Water Reactor): Far Beyond a Standard Modular Solution
(The American Society of Mechanical Engineers (ASME), 2024)The Leibstadt nuclear power plant (KKL) in Switzerland was originally commissioned in 1984 with a nominal power output of 1000 MWel. Since then, there have been several uprates of the boiling water reactor (BWR), which ... -
Aerodynamic Stability Enhancement of a SCO2 Centrifugal Compressor by Riblets of the Shroud
(The American Society of Mechanical Engineers (ASME), 2024)Aerodynamic stability enhancement is crucial for the stable operation of supercritical carbon dioxide (SCO2) centrifugal compressors. This paper investigates the mechanism of aerodynamic instability of shrouded SCO2 ... -
Tuning Modal Behavior of Additively Manufactured Lattice Structures
(The American Society of Mechanical Engineers (ASME), 2024)Thanks to the increasingly widespread additive manufacturing technology and promising properties, the use of lattice structures (LS) is becoming increasingly frequent. LS allows the components to be designed with tunable ... -
Configuration of Organic Rankine Cycles for Geothermal Applications: An Industrial Perspective
(The American Society of Mechanical Engineers (ASME), 2024)Geothermal resources represent a valuable option to reduce fossil fuel-based power production because they feature an unmatched capacity factor among other renewable energy sources (RES). Geothermal resource availability ... -
Measurement of Laminar Burning Speed of Methane/Hydrogen/Air Mixtures at High Pressures and Temperatures
(The American Society of Mechanical Engineers (ASME), 2024)Green hydrogen which could be produced from renewable sources by solar water splitting or photovoltaic electrolysis will play an important role in achieving net-zero in the near future. One possible approach will be to mix ... -
Understanding the Nonlinear Reactivity Promoting Effect of n-Heptane Addition on the Binary Mixture From Low to Intermediate Temperature: A Case of Methane/n-Heptane Mixtures
(The American Society of Mechanical Engineers (ASME), 2024)To understand the effect of n-heptane (NC7H16) addition on the auto-ignition of methane (CH4) at low to intermediate temperatures, the ignition delay times (IDTs) of stoichiometric CH4/NC7H16 blends with varying NC7H16 ... -
Condition Monitoring of Wind Turbine Drivetrain Bearings
(The American Society of Mechanical Engineers (ASME), 2024)As an extremely valuable and reliable energy source, the renewable energy is developing around the world at an unprecedented pace. By the end of 2022, the global installed capacity of offshore wind turbines is expected to ... -
Investigating the Mixture Quality in Multi-Injector Burner Systems, Part II: Model Application
(The American Society of Mechanical Engineers (ASME), 2024)Multi-injector burner systems offer a high spatial-temporal mixture homogeneity due to their small size and thus have a high NOx emission reduction potential at increasing flame temperatures. This potential is reduced due ... -
Reducing Methane Emissions From Lean Burn Natural Gas Engines With Prechamber Ignited Mixing-Controlled Combustion
(The American Society of Mechanical Engineers (ASME), 2024)The oil and gas industry heavily relies on lean burn spark ignited natural gas reciprocating engines. These engines are used in many applications, such as oil and gas exploration, production, processing, compression, ... -
Numerical Modeling of Swirl Stabilized Lean-Premixed H2–CH4 Flames With the Artificially Thickened Flame Model
(The American Society of Mechanical Engineers (ASME), 2024)The lean premixed technology is a very convenient combustion strategy to progressively move from natural gas to high hydrogen content fuels in gas turbines limiting the pollutants emissions at the same time. The enabling ... -
Leveraging Additive Manufacturing to Fabricate High Temperature Alloys With Co-Designed Mechanical Properties and Environmental Resistance
(The American Society of Mechanical Engineers (ASME), 2024)A paradigm shift in the traditional sequential design approaches is critically essential to create application-specific hierarchical and multifunctional materials with superior long-term performance for next-generation ... -
Optimization of a High Pressure Turbine Blade and Sector-Based Annular Rig Design for Supercritical CO2 Power Cycle Representative Testing
(The American Society of Mechanical Engineers (ASME), 2024)As part of the ongoing research into the design of hardware for zero emission cycles, a first-stage high-pressure turbine (HPT) blade is optimized for a 300 MWe supercritical CO2 (sCO2) power cycle using the surrogate-assisted ... -
Robust Tip Gap Measurements: A Universal In-Situ Dynamic Calibration and Demonstration in a Two-Stage High-Speed Turbine
(The American Society of Mechanical Engineers (ASME), 2024)Tip clearance monitoring is essential for the active health monitoring of turbomachinery and their development toward more efficient systems. Proper sensor calibration is paramount to this purpose, frequently being a ... -
Mechanisms Leading to Stabilization and Incomplete Combustion in Lean CH4/H2 Swirling Wall-Impinging Flames
(The American Society of Mechanical Engineers (ASME), 2024)In gas turbines, confined highly turbulent flames unavoidably propagate in the vicinity of a relatively cool combustor liner, affecting both the local flame structure and global operation of the combustion system. In our ... -
Quantitative Definition of Spray Edge With Extinction Diagnostics and Evaluation of Attenuation Coefficient for Liquid Jets in Supersonic Crossflow
(The American Society of Mechanical Engineers (ASME), 2024)A quantifiable, reproducible, and repeatable definition of the three-dimensional spray width and depth for a canonical jet in an open-source supersonic crossflow is presented. An expanding Mach 2 dry-air crossflow is ... -
Effects of Intermediate Pressure and Split Ratio on Supercritical Modified Recompression Cycles Performance
(The American Society of Mechanical Engineers (ASME), 2024)Engineers and scientists are continuously in search of higher power system efficiencies. Among new ones, supercritical recompression carbon dioxide power cycle has been promising. In addition to the simple recompression ... -
Aeroacoustic Effects on the Forcing of Fan and Compressor Blades Due to Distortion
(The American Society of Mechanical Engineers (ASME), 2024)A distorted air stream entering an aeroengine fan or compressor leads to harmonic forces on the rotating blades. These aerodynamically induced forces are well-known causes of blade vibration and associated fatigue problems. ...