YaBeSH Digital Library: Recent submissions
Now showing items 13901-13920 of 316660
-
Novel Combustion Instability Diagnosis Method With Upstream Pulsation of Repetitive Laser-Induced Plasmas
(The American Society of Mechanical Engineers (ASME), 2024)In this experimental study, we are presenting the ability of laser-induced plasmas with successive pulsation to identify combustion instabilities (CI) of a premixed lab-scale combustor. An acoustic disturbance equivalent ... -
Dynamic Performance of Liquid Smooth Annular Seal Operating in the Transition Regime
(The American Society of Mechanical Engineers (ASME), 2024)This paper presents the experimental leakage and rotordynamic performance for a liquid smooth annular seal operating in the transition regime. The test conditions include pressure differentials up to 64 bars with 1∼2 bar ... -
Experimental Study of the Impact of Ethanol Content on Partially Premixed Combustion With Ethanol-Gasoline Blends
(The American Society of Mechanical Engineers (ASME), 2024)As ethanol production increases and the demand for gasoline in spark ignition engines decreases over the next few decades, the use of these fuels in compression ignition systems is expected to increase. This raises the ... -
Comprehensive Flow Path Design Method for the Adaptive Cycle Engine Considering the Coupling Relation of Multiple Components
(The American Society of Mechanical Engineers (ASME), 2024)The adaptive cycle engine (ACE) has multiple coupled components on the same spool and complex bypass system, which makes it have more complex intercomponent coupling relation and hard to coordinate in the flow path design. ... -
Spacer Fluids for Use With Rock-Based Geopolymer
(The American Society of Mechanical Engineers (ASME), 2024)Developing a spacer fluid compatible with geopolymers and capable of facilitating effective mud displacement becomes imperative when considering the utilization of geopolymers as a complete substitute for cement in oil and ... -
Partial Eigenvalues Assignment in Singular Systems Using Brauer and Rado Eigenvalue Embedding for Impulse Elimination
(The American Society of Mechanical Engineers (ASME), 2024)A partial infinite eigenvalues assignment for singular systems is proposed, inspired by the well-known Brauer theorem for eigenvalue embedding. Removal of infinite eigenvalues is a frequent practice in mechanical systems, ... -
Influence of Gap Shape on Flow Characteristics of Highly Loaded Compressor Tandem Cascades
(The American Society of Mechanical Engineers (ASME), 2024)Gap shape is an important factor affecting the tandem cascade performance. This paper uses the gap expansion angle (Kb−b) to define gap shape and studies the effect of Kb−b on the two-dimensional flow field and flow ... -
Numerical Investigation of a Hydrogen–Air Flame for NOx Prediction
(The American Society of Mechanical Engineers (ASME), 2024)Sustainable aviation fuels are a major candidate to reduce pollutant emissions in future aeronautical engines. Recently, the use of hydrogen as a fuel has gained a high interest partly because its combustion is free from ... -
Estimation of Piston Surface Temperature During Engine Transient Operation for Emissions Reduction
(The American Society of Mechanical Engineers (ASME), 2024)Piston surface temperature is an important factor in the reduction of harmful emissions in modern gasoline direct injection (GDI) engines. In transient operation, the piston surface temperature can change rapidly, increasing ... -
Operational Strategies of Two-Spool Micro Gas Turbine With Alternative Fuels: A Performance Assessment
(The American Society of Mechanical Engineers (ASME), 2024)Micro gas turbines (mGT) have not yet succeeded in conquering the small-scale combined heat and power (CHP) market. One reason is that their electrical efficiency is not high enough to maintain a cost-effective operation. ... -
Thrust Rebalance to Extend Engine Time On-Wing With Consideration of Engine Degradation and Creep Life Consumption
(The American Society of Mechanical Engineers (ASME), 2024)Over the years, airlines have consistently attempted to lower their operational costs and improve aircraft availability by applying various technologies. Engine maintenance expenses are one of the most substantial costs ... -
Design of an Environmental Barrier Coating Bond Strength Test Coupon
(The American Society of Mechanical Engineers (ASME), 2024)The bond strength of an environmental barrier coating (EBC) to a substrate such as a silicon carbide fiber/silicon carbide matrix (SiC/SiC) ceramic matrix composite (CMC) is a function of coating application parameters, ... -
Simulation-Based Thermal Fatigue Validation Test Development for Exhaust Manifold
(The American Society of Mechanical Engineers (ASME), 2024)Exhaust manifolds in diesel engines undergo continuous thermal cycle loading of varying thermal cycles with different mean, amplitude, and rate of temperature change created by application duty cycles. This makes analysis ... -
Characterizing Drop-Wall Interactions of Engine Fuels at Engine-Relevant Conditions Using Smoothed Particle Hydrodynamics
(The American Society of Mechanical Engineers (ASME), 2024)In an internal combustion engine, interactions of fuel droplets and heated walls can significantly affect the combustion process and engine performance. The formation and characteristics of secondary droplets from drop-wall ... -
A New Global Gas Dynamics Performance Optimization Method for Refrigeration Centrifugal Compressor Stage Based on the Immune Algorithm
(The American Society of Mechanical Engineers (ASME), 2024)This study proposes a new global gas dynamics optimization method, which was applied to a multi-objective optimization task of centrifugal compressor performance with the aim of determining the improvement probability for ... -
Numerical and Experimental Study on the Influence of Honeycomb Bushing Wear on the Leakage Flow Characteristics of Labyrinth Seal
(The American Society of Mechanical Engineers (ASME), 2024)Honeycomb bushing wear has a significant effect on the leakage characteristics of the labyrinth seal. In this paper, four kinds of honeycomb bushing labyrinth seals was designed and processed. The leakage characteristics ... -
E-Fuels as Reduced Carbon Emission Options
(The American Society of Mechanical Engineers (ASME), 2024)Synthetic “E-fuels,” or electro-fuels, have been introduced as a potential reduced carbon emissions energy source for power generation and vehicle propulsion applications. Environmental change is needed, with the transportation ... -
A Hybrid Heavy Duty Diesel Power System for Off-Road Applications—Concept Validation
(The American Society of Mechanical Engineers (ASME), 2024)A multiyear power system R&D program was completed with the objective of developing an off-road hybrid heavy duty diesel engine with front end accessory drive-integrated energy storage. This system was validated to ... -
Characterization of Flex-Fuel Prechamber Enabled Mixing-Controlled Combustion With Gasoline/Ethanol Blends at High Load
(The American Society of Mechanical Engineers (ASME), 2024)This numerical study focuses on the characterization of prechamber-enabled mixing-controlled combustion (PC-MCC) at ∼18 bar brake mean effective pressure (BMEP) and 2200 rpm with 10% by volume ethanol-gasoline blend (E10) ... -
Tuning of Generalized K-Omega Turbulence Model by Using Adjoint Optimization and Machine Learning for Gas Turbine Combustor Applications
(The American Society of Mechanical Engineers (ASME), 2024)Turbulence modeling plays a crucial role in swirl-stabilized gas turbine combustors, typically relying on scale-resolved simulations (SRS) such as large eddy simulations (LES). However, LES is computationally expensive due ...