Numerical and experimental investigation of the scattering of electromagnetic waves by perfectrly conducting ensebles

Canatan, Fatih


Numerical and experimental investigation of fatigue life in deep drawn parts
Aytekin, Oğuz; Söylemez, Eres; Department of Mechanical Engineering (2006)
Sheet metal forming has an important place among metal forming processes. As the usage of sheet metal increases, the fatigue simulation and optimization of these parts become more important. This thesis study examines the change of the fatigue life of a sheet metal part after forming. A sphere-like shape is deep drawn and change in thickness and residual stresses are analyzed. To understand the effect of residual stresses, deep drawn parts with and without residual stress tested against the fatigue failure....
Numerical and experimental investigation of forced filmwise condensation over bundle of tubes in the presence of noncondensable gases
Ramadan, Abdul-Ghani M; Yamalı, Cemil; Department of Mechanical Engineering (2006)
The problem of the forced film condensation heat transfer of pure steam and steam-air mixture flowing downward a tier of horizontal cylinders is investigated numerically and experimentally. Liquid and vapor-air mixture boundary layers were solved by an implicit finite difference scheme. The effects of the free stream non-condensable gas (air) concentration, free stream velocity (Reynolds number), cylinder diameter, temperature difference and angle of inclination on the condensation heat transfer are analyze...
Numerical and Experimental Investigation of Rotor Aerodynamics In Ground Effect with Inclined Planes
Şahbaz, Mehmet; Sezer Uzol, Nilay; Kurtuluş, Dilek Funda (null; 2019-11-02)
In this work, the ground effect phenomena for a rotary wing is investigated both numerically and experimentally. For this purpose, a test setup with scaled model helicopter rotor is established. The experimental setup give the opportunity to investigate the rotor aerodynamics both with inclined ground and without any inclination. The thrust and torque values are obtained for different rotational speeds with constant collective pitch. The effects of the inclined ground and the effects of the ground with extr...
Numerical and experimental investigation of damping in a dam-break problem with fluid-structure interaction
Demir, Abdullah; Dincer, Ali Ersin; Bozkuş, Zafer; Tijsseling, Arris S. (Zhejiang University Press, 2019-04-01)
There have been few experimental and numerical studies on damping effects in fluid-structure interaction (FSI) problems. Therefore, a comprehensive experimental study was conducted to investigate such effects. In experiments, a water column in a container was released and hit a rubber plate. It continued its motion until hitting a downstream wall where pressure transducers had been placed. The experiments were repeated using rubber plates with different thickness and material properties. Free-surface profil...
Numerical and experimental investigation of radar absorbing performance of composite materials with frequency selective surface
Subaşı, Buse; Şimşir, Caner; Department of Metallurgical and Materials Engineering (2022-11-18)
Materials having radar absorbing property show critical importance for space vehicles in defense industry. Among all of the radar absorption mechanisms, use of frequency selective surface has become prominent. In this thesis, composite material having frequency selective surface was developed, manufactured and characterized. Designing of frequency selective surface operating in 8.2 – 12.4 GHz frequency range was conducted by means of finite element analysis method. In addition to radar absorbing performance...
Citation Formats
F. Canatan, “Numerical and experimental investigation of the scattering of electromagnetic waves by perfectrly conducting ensebles,” Middle East Technical University, 1971.