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RISNavigating Technological Risks: An Uncertainty Analysis of Powertrain Technology in Hybrid-Electric Commuter Aircraft
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study addresses the uncertainties in hybrid-electric powertrain technology for a 19-passenger commuter aircraft, focusing on two future Entry-Into-Service timeframes: 2030 and 2040. The methodology is split into a ...
Deterministic Optimization Approach for High-Performance Externally Fired Biomass-Fueled Micro-Gas Turbines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This work focuses on a dual-objective optimization of a 100 kWe externally fired micro-gas turbine utilizing the producer gas from a biomass gasifier. Although externally fired micro-gas turbines are convenient for resolving ...
Unsteady Steam Turbine Optimization Using High-Fidelity Computational Fluid Dynamics
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents the computational methodology and experimental investigations accomplished to enhance the efficiency of a turbine stage by applying non-axisymmetric profiling on the rotor hub wall. The experimental ...
Conceptual Design and Energy Storage Positioning Aspects for a Hybrid-Electric Light Aircraft
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This work is a feasibility study of a 19-passenger hybrid-electric aircraft, to serve the short-haul segment within the 200–600 nautical miles. Its ambition is to answer some dominating research questions, during the ...
Improved Accuracy in Jet Impingement Heat Transfer Experiments Considering the Layer Thicknesses of a Triple Thermochromic Liquid Crystal Coating
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper examines the applicability of a triple layer of thermochromic liquid crystals (TLCs) for the determination of local heat transfer coefficients using the transient liquid crystal (LC) technique. The experiments ...
Unsteady Wet Steam Flow Field Measurements in the Last Stage of Low Pressure Steam Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Modern steam turbines need to operate efficiently and safely over a wide range of operating conditions. This paper presents a unique unprecedented set of timeresolved steam flowfield measurements from the exit of the last ...
Unsteady Flow Field and Coarse Droplet Measurements in the Last Stage of a Low-Pressure Steam Turbine With Supersonic Airfoils Near the Blade Tip
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The largest share of electricity production worldwide belongs to steam turbines. However, the increase of renewable energy production has led steam turbines to operate under part load conditions and increase in size. As a ...
Power Flow Optimization for a HybridElectric Propulsion System
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study deals with the optimization of performance for a hybridelectric propulsion system. It focuses on the modeling and power management frameworks, while evaluation is done on a single flight basis. The main objective ...
An Additively Manufactured Four-Sensor Fast Response Aerodynamic Probe
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study describes the design, development, and testing of a miniature fast response aerodynamic probe (FRAP) with four sensors (4S), which are able to perform measurements in the unsteady three-dimensional flow field. ...
Turbine Hub Cavity Modes and Their Impact on Efficiency
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Non-synchronous pressure and temperature fluctuations at the hub cavity of a turbine stage are the main focus of this study. Cavity modes are unsteady fluctuations generated at the cavity exit due to instabilities in this ...