Πλοήγηση ανά Θέμα "Engineering, Mechanical"
Αποτελέσματα 21-40 από 118
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Data analysis and performance model calibration of a small turbojet engine
(2012)The experience gained during the development of a small turbojet engine simulation model is presented in this article. The calibration of an initial model has been proven inadequate for producing reasonable values for some ... -
Denting of internally pressurized tubes under lateral loads
(2006)The present work examines the structural response of tubular members subjected to lateral quasi-static loading, imposed by wedge-shaped denting devices, in the presence of internal pressure. First, tubes are modeled with ... -
Design optimization of quarter-car models with passive and semi-active suspensions under random road excitation
(2005)A methodology is presented for optimizing the suspension damping and stiffness parameters of nonlinear quarter-car models subjected to random road excitation. The investigation starts with car models involving passive ... -
Development of Strong Surfaces Using Functionally Graded Composites Inspired by Natural Teeth-A Theoretical Approach
(2010)In recent years functionally-graded composites have been proposed to develop strong surfaces that can withstand high contact and frictional forces. The present work presents a new graded composite that can be used for the ... -
Development of Strong Surfaces Using Functionally Graded Composites Inspired by Natural Teeth-Finite Element and Experimental Verification
(2010)Functionally graded materials (FGMs) are composite materials that exhibit a microstructure that varies locally in order to achieve a specific type of local material properties distribution. In recent years, FGMs appear to ... -
A dual Kalman filter approach for state estimation via output-only acceleration measurements
(2015)A dual implementation of the Kalman filter is proposed for estimating the unknown input and states of a linear state-space model by using sparse noisy acceleration measurements. The successive structure of the suggested ... -
Effect of magnetic field on near-wall coherent structures and heat transfer in magnetohydrodynamic turbulent channel flow of low Prandtl number fluids
(2011)A numerical study is carried out of the magnetic field effects on the coherent structures and the associated heat transfer in a turbulent channel flow with constant temperature at the bottom (cold) and top (hot) walls. ... -
The effect of prediction error correlation on optimal sensor placement in structural dynamics
(2012)The problem of estimating the optimal sensor locations for parameter estimation in structural dynamics is re-visited. The effect of spatially correlated prediction errors on the optimal sensor placement is investigated. ... -
Effect of wall roughness on shear viscosity and diffusion in nanochannels
(2010)The effect of wall roughness on liquid argon shear viscosity and diffusion coefficient in nanochannels is studied by non-equilibrium molecular dynamics. Diffusion coefficient results are presented in terms of average values ... -
The effects of construction practices on the seismic performance of RC frames with masonry infills
(2008)A number of construction practices, implemented during the design process of a reinforced concrete (RC) structural system, may have significant consequences on the behaviour of the structural system in the case of earthquake ... -
The elastic-plastic indentation response of a columnar thermal barrier coating
(2010)Thermal barrier coatings with a columnar microstructure are prone to erosion damage by a mechanism of surface cracking upon impact by small foreign particles. In order to explore this erosion mechanism, the elastic indentation ... -
Entropy-based optimal sensor location for structural model updating
(2000)A statistical methodology is presented for optimally locating the sensors in a structure for the purpose of extracting from the measured data the most information about the parameters of the model used to represent structural ... -
Evaluating the real profile length in turning of carbon steels
(2003)The real profile length constitutes a hybrid parameter in surface metrology which is rather neglected in literature, albeit it affects or controls sometimes surface functional properties like corrosion resistance, adhesibility, ... -
Evaluation of creep damage of INCOLOY 800HT pigtails in a refinery steam reformer unit
(2014)Pigtail tubes constitute a critical component of the outlet system of steam reformer units for hydrogen production in refineries. Creep failure of pigtails is a common cause of downtime and potential risk to plant personnel. ... -
Evaluation of gas path analysis methods for gas turbine diagnosis
(2011)In the present paper, limitations concerning three implementations of gas path analysis (GPA) methods are investigated and their diagnostic effectiveness is evaluated. The methods were tested for different sets of faults ... -
Evidence on the corrosion-induced hydrogen embrittlement of the 2024 aluminium alloy
(2005)The present work aims to provide evidence of corrosion-induced hydrogen embrittlement of the aircraft aluminium alloy 2024. An extensive experimental investigation involving metallographic and fractographic analyses as ... -
Experimental investigation of the effect of a B70 biodiesel blend on a common-rail passenger car diesel engine
(2009)The results of engine bench tests of a 2.01 common-rail high-pressure injection passenger car diesel engine fuelled by B70 biodiesel blend are compared with the corresponding results of baseline tests with standard EN 590 ... -
Experimental Investigation of the Energy Needs for a Conventionally and an Infrared-Heated Greenhouse
(2012)Infrared (IR) heating as alternative to forced air heating has been studied experimentally for 70 days in two identical, small-scale, experimental greenhouses. The two heating options were implemented with four IR electric ... -
Experimental investigation of the pressure drop in porous ceramic diesel particulate filters
(2002)Understanding of the mechanisms that affect flow and pressure drop in porous ceramic diesel particulate filters is important in the design optimization of this class of diesel exhaust after-treatment systems. Furthermore, ... -
Experimental investigation of the role of soot volatile organic fraction in the regeneration of diesel filters
(2003)This paper involves an experimental investigation of the role of the volatile organic fraction (VOF) adsorbed on the diesel particulate, in the initiation of regeneration of a SiC diesel filter installed on a modern diesel ...