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Investigation of groundwater quantitative change, Tehran Province, Iran
Groundwater Aquifer Level changes Decline Homand-Absard Iran
2018/3/23
Changes in groundwater level in Homand-Absard plain, located in north-west of Kavir-e-Markazi watershed and east of Tehran province, were studied. The used research method was descriptive approach, an...
Investigation on a new method of adaptive drag reduction and nonablation thermal protection system for hypersonic vehicles
hypersonic drag reduction heat flux jet aerospike numerical simulation
2013/9/2
A new adaptive drag reduction and nonablation thermal protection method named Telescopic Selfaligning JetSpike (TSAJS) is proposed to improve the conventional spiked method employed in hypersonic v...
Experimental investigation of combustion mechanisms of kerosene-fueled scramjet engines with double-cavity flameholders
Scramjet Supersonic combustion Flame structure Cavity flameholder
2012/2/28
A scramjet combustor with double cavitybased flameholders was experimentally studied in a directconnected test bed with the inflow conditions of M = 2.64, Pt = 1.84MPa, Tt = 1300 K. Successful ignitio...
Investigation on the choice of boundary conditions and shape functions for flexible multi-body system
Multi-body systems Boundary conditions Assumed mode approach
2012/2/24
The objective of this investigation is to examine the correctness and efficiency of the choice of boundary conditions when using assumed mode approach to simulate flexible multi-body systems. The disp...
Comparison of strain gage technique and photoelastic coating method in the investigation procedure of femur prostheses
strain gauge technique photoelastic coating method
2010/3/11
Photoelastic coating was applied to investigate the contact stress distribution between the femur shaft and the indrawn prosthesis. To obtain an overall pattern of the stress distribution the investig...
Investigation of Non-Newtonian Micropolar Fluid Flow with Uniform Suction/Blowing and Heat Generation
Stagnation point flow Stretching sheet Heat generation Finite difference method
2009/10/9
The steady laminar flow with heat generation of an incompressible non-Newtonian micropolar fluid impinging on a porous flat plate is investigated. A uniform suction or blowing is applied normal to the...
Investigation of regularized techniques for boundary knot method
boundary knot method regularization method singular value decomposition Helmholtz problem
2010/10/22
This study investigates regularization techniques for the boundary knot method (BKM). We consider three regularization methods and two approaches for the determination of the regularization parameter....
Investigation on the spurious eigenvalues of vibration plates by non-dimensional dynamic influence function method
Meshless Non-dimensional dynamic influence function method Plate vibration
2010/10/22
This paper makes a numerical investigation on the spurious eigenvalues problem by the
non-dimensional dynamic influence function (NDIF) method for plate vibration problems. We find
that the NDIF spu...
Numerical investigation of rotor-stator interactions in a 1.5-stage low-speed axial compressor
axial compressor rotor-stator-interaction periodic unsteady blade pressure uctuation unsteady blade pressure force
2010/3/11
The relative motion of rotor and stator leads to viscous and inviscid interactions between the blade rows. This is the reason why the °ow in turbomachines is periodically unsteady. The unsteady °ow &m...
Investigation of the energy characteristics in a layered beam-damper
computational modeling plastic deformation thermomechanical properties
2010/3/12
Coupled thermomechanical behaviour of inhomogeneous viscoplastic structures under cyclic loading is investigated for the problem of harmonic bending and dissipative heating of a three-layered beam. Tw...
An experimental investigation of the unsteady flow in a two-stage low-pressure research turbine
axial flow turbine hot-wire measurements rotor-stator aerodynamic interaction
2010/3/12
Results of an experimental investigation of the unsteady flow in a two-stage low-pressure large-scale research turbine are presented. Velocity and turbulence measurements were performed upstream and d...
Investigation of the equations of motion in terms of displacements, constructed on the basis of the Lennard-Johns law, under the action of harmonic loading
the equations of motion terms of displacements the action of harmonic loading
2010/3/12
Investigation of the equations of motion in terms of displacements, constructed on the basis of the Lennard-Johns law, under the action of harmonic loading。