Central European Journal of Engineering
2081-9927
1896-1541
Cơ quản chủ quản: N/A
Phân tích ảnh hưởng
Các bài báo tiêu biểu
A reliable iterative method for solving the time-dependent singular Emden-Fowler equations
Tập 3 - Trang 99-105 - 2012
Many problems of physical sciences and engineering are modelled by singular
boundary value problems. In this paper, the variational iteration method (VIM)
is used to study the time-dependent singular Emden-Fowler equations. This method
overcomes the difficulties of singularity behavior. The VIM reveals quite a
number of features over numerical methods that make it helpful for singular and
nonsingu...
Numerical investigation on composite material marine current turbine using CFD
Tập 1 - Trang 334-340 - 2011
A novel manufacturing approach similar to filament winding has been developed
and automated and is able to produce the Composite Material Marine Current
Turbines (CMMCT), which have significant advantages over traditional designs.
This paper presents numerical results to investigate the performance of these
turbines. The numerical approach was performed using Computational Fluid
Dynamics (CFD) in ...
On the critical forcing amplitude of forced nonlinear oscillators
Tập 3 - Trang 764-770 - 2013
The steady-state response of forced single degree-of-freedom weakly nonlinear
oscillators under primary resonance conditions can exhibit saddle-node
bifurcations, jump and hysteresis phenomena, if the amplitude of the excitation
exceeds a certain value. This critical value of excitation amplitude or critical
forcing amplitude plays an important role in determining the occurrence of
saddle-node bif...
Hydrodynamic perspectives of soil scour in fluvial environment
Tập 3 - Trang 541-548 - 2014
The major concern for many hydraulic structures is the effect of scour at the
toe, when the racing floodwater scours away the bed just downstream of the
piers. Therefore, understanding the soil-hydrodynamic interaction needs to be
investigated. In this study, a series of 2D laboratory tests have been carried
out to study the likelihood of soil scour due to the soil-hydrodynamic
interaction and inf...
The influence of thickness of CrN coating on the durability of hot forging dies
Tập 1 - Trang 210-216 - 2011
This article presents results which enabled the determination of the role of CrN
coating and the influence of its thickness on the effectiveness of hybrid layer
“nitrided layer / CrN coating” in the process of increasing the durability of
forging dies. Dies coated with hybrid layers “nitrided layer / CrN coating” with
various CrN coating thickness were — after different maintenance periods —
subje...
Pneumatic pulsator design as an example of numerical simulations in engineering applications
Tập 2 - Trang 76-82 - 2011
The paper presents the part of the investigation that has been carried out in
order to develop the pneumatic pulsator which is to be employed as an unblocking
device at lose material silo outlets. The part of numerical simulation is
reported. The fluid dynamics issues have been outlined which are present during
supersonic airflow thought the head of the pulsator. These issues describe the
pneumati...
Investigation of heat transfer in a triple-glazing type window at greek climate conditions
Tập 3 - Trang 750-763 - 2013
Heat loss through building windows has a major effect on the energy efficiency
of the buildings. The window studied in this paper is a triple-glazing type
window pane in which spaces contain dry air. The window is placed in a specially
developed test chamber at the Energy and Environmental Research Laboratory of
Central Greece University of Applied Sciences at Chalkida. At one side of the
test cha...
Assessment of reliable fatigue life of orthotropic steel deck
Tập 1 - Trang 306-315 - 2011
The fatigue life assessment of orthotropic steel decks of highway bridges still
hasn’t been sufficiently investigated. The inspection results of orthotropic
steel decks have shown that their working life can be shorter than other members
of steel highway bridges due to fatigue. This means that particular details of
orthotropic decks can be critical regarding the service life of a bridge. The
fatig...
Integration of plug-in hybrid electric vehicles (PHEV) with grid connected residential photovoltaic energy systems
Tập 3 - Trang 233-242 - 2013
This paper proposes an approach for integrating Plug-In Hybrid Electric Vehicles
(PHEV) to an existing residential photovoltaic system, to control and optimize
the power consumption of residential load. Control involves determining the
source from which residential load will be catered, where as optimization of
power flow reduces the stress on the grid. The system built to achieve the goal
is a co...
Numerical simulation of the 3D unsteady turbulent flow in a combustion chamber
- 2011
The influence of turbulence models on the 3D unsteady flow in a combustion
chamber with a central bluff body is analyzed. Three different turbulence models
are used (realizable k-ε, Reynolds Stress Model and Large Eddy Simulation) and a
comparison is made on the evolution of the velocity field over time. The
numerical simulation of the gas flow in the combustion chamber was performed
using FLUENT ...