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RISIn Situ Nuclear Magnetic Resonance Observation of Pore Fractures and Permeability Evolution in Rock and Coal under Triaxial Compression
Publisher: American Society of Civil Engineers
Abstract: AbstractThis study presents a novel approach that incorporates nuclear magnetic resonance
(NMR) measurement and triaxial loading chamber to accomplish the laboratory in situ
continuous observation of the pore-fracture ...
A Homogeneous Phase Change Model for Two Phase Mechanical Seals With Three Dimensional Face Structures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A homogenous phase change model (HPCM) based on the mass conservation law is proposed to analyze the flow field of a twophase mechanical seal with 3D face structures. The twophase flow domain is governed by the simultaneous ...
Experimental Investigation on Fiber Thermocouples Used in Brush Seals for Temperature Measurements
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A type of fiber thermocouple is applied to a brush seal in order to obtain the temperature of the bristlerotor friction zone. Using a brush seal test rig, the temperature measurements utilizing a fiber thermocouple, infrared ...
Theoretical and Experimental Investigation on Tip Forces and Temperature Distributions of the Brush Seal Coupled Aerodynamic Force
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Based on a type of threedimensional slice model of a brush seal combined with the commercial CFD software FLUENT, the study calculated the leakage flow of the brush seal. The aerodynamic forces applied on upstream and ...
Dynamic Leakage Analysis of Noncontacting Finger Seals Based on Dynamic Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Noncontacting finger seals are new compliant seal in gas turbine engine sealing technology. Their potential hydrodynamic and hydrostatic lifting capabilities make them preferable to brush seals and contacting finger seals. ...
Stratified Revised Asperity Contact Model for Worn Surfaces
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Segmented bi-Gaussian stratified elastic asperity contact model of Leefe (1998, “‘Bi-Gaussian’ Representation of Worn Surface Topography in Elastic Contact Problems,” Tribol. Ser., 34, pp. 281–290), which suits for worn ...
A Simulation Method for Non-Gaussian Rough Surfaces Using Fast Fourier Transform and Translation Process Theory
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The simulated rough surface with desired parameters is widely used as an input for the numerical simulation of tribological behavior such as the asperity contact, lubrication, and wear. In this study, a simulation method ...
Fretting Wear Behavior and Damage Mechanisms of Inconel X-750 Alloy in Dry Contact Condition
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Frictional and fretting wear behaviors of Inconel X-750 alloy against GCr15 steel ball were investigated in dry contact condition with ∼60% air humidity. Fretting tests were run at the high frequency tribosystem SRV 4 in ...
Permeability and Energy Evolution of Coal under Unloading Confining Pressure
Publisher: American Society of Civil Engineers
Abstract: Abstract To understand the permeability and energy evolution of coals under the mining-induced
stress, constant and unloading confining pressure tests are conducted. The permeability
and energy evolution of coals under ...
The Effect of Wear on the Performance of a Rotary Lip Seal
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Theoretical analysis, combined with experimental verification, is used to study the effect of wear on the performance of a rotary lip seal as characterized by the pumping rate and friction torque. The performance of a ...