Browsing CE Theses and Dissertations by Title

Now showing items 311-330 of 481

A new multi-channel MAC protocol for wireless ad hoc networks with single transceiver

Canbolat, Musa Aykut (Wichita State University, 2007-07)

Although IEEE 802.11a/b/g standards allow use of multiple channels, only a single channel is popularly used, due to the lack of efficient protocols that enable use of Multiple Channels. There are some papers challenging ...
Numerical analysis of effects of leading-edge protuberances on aircraft wing performance

Malipeddi, Anil Kumar (Wichita State University, 2011-07)

This thesis investigates the effects of biologically inspired leading-edge protuberances on aircraft wings. The study of humpback whales and their flipper performance was the impetus to modifying the leading edge of an ...
Numerical and experimental investigation of ice shedding

Shimoi, Koji (Wichita State University, 2010-05)

The shedding of ice accreted on aircraft surfaces poses a serious threat to flight safety as it can cause severe damage to downstream aircraft components such as aft-mounted engines. While there is strong need for ice ...
Numerical and experimental studies on the use of a Split Hopkinson Pressure Bar for high strain rate tension testing

Acosta, Juan Felipe (Wichita State University, 2012-07)

The Split Hopkinson Pressure Bar (SHPB) technique is widely used to dynamically characterize metals and is increasingly being used to characterize non-metallic materials such as fiber reinforced polymeric composite materials. ...
Numerical investigation of a jet flow with a hatch and an opening

Nagrecha, Mrinal V. (Wichita State University, 2011-12)

The goal of this project was to establish a datum for acoustics generated in an exhaust flow from a jet pipe, due to the presence of an opening with a hatch at an angle, by using the Computational Fluid Dynamics (CFD) tool ...
Numerical investigation of a wing hot air ice protection system

Rodríguez, Alonso Oscar Zamora (Wichita State University, 2009-12)

Aircraft icing is a recurrent aviation safety concern. In the past eight years alone, eight icing accidents involving business jets and other aircraft have occurred. The accumulation of ice on critical aerodynamic surfaces, ...
Numerical investigation of self-piercing riveted dual layer joint

Krishnappa, Uma Shankar (Wichita State University, 2008-12)

Self-piercing riveting (SPR) is a high-speed mechanical fastening technique for point joining of sheet-material components. SPR is becoming important in automotive applications for aluminium vehicle body assembly. However, ...
Numerical method for compressible turbulence with shock waves

Arshed, Ghulam Murshed (Wichita State University, 2012-07)

This dissertation proposes improvements in the numerical algorithm for the dynamics of flows that involve discontinuities and broadband fluctuations simultaneously. These two flow features suggest numerical strategies of ...
Numerical simulation of blood flow in arterial stenosis under steady and pulsatile flow conditions

Dave, Parth Pranavbhai (Wichita State University, 2011-05)

Cardiovascular diseases (CVDs) are among the leading causes of death in the world. In this study, an attempt was made to model the flow dynamics of blood in abnormally narrowed artery. Finite volume solver FLUENT was ...
Numerical simulation of pulsatile blood flow across a tilting–disk mechanical heart valve

Nejadmalayeri, Alireza (Wichita State University, 2007-07)

To overcome several clinical challenges involving mechanical heart valves, accurate numerical simulation of blood flow through these devices has been of interest. Since heart disease is the leading cause of death around ...
Numerical simulation of steady and pulsatile flow in stenosed tapered artery and abdominal aortic aneurysm using κ-ω model

Tala, Chiragkumar D. (Wichita State University, 2010-12)

The effect of hemodynamics on cardiovascular disease (CVD) is very important since CVD is the number one killer nationwide and around the globe. Coronary artery disease (CAD), also called arteriosclerosis, is a common ...
Numerical simulation of wall-pressure fluctuations due to turbulent boundary layer

Mahmoudnejad, Niloufar (Wichita State University, 2011-12)

Pressure fluctuations associated with turbulent boundary layer have been a prominent issue over the past few decades. In order to simulate pressure fluctuations beneath a turbulent boundary layer, a numerical investigation ...
Numerical simulations of blood flow in arteries using fluid-structure interactions

Shaik, Eleyas (Wichita State University, 2007-07)

Cardiovascular disease (CVD) is the number one cause of death in the United States and worldwide. Among the various CVDs, coronary artery disease (CAD) is the leading cause of death among both men and women. Of the various ...
Numerical study of the occurrence of adiabatic shear banding without material failure

Swaminathan, Palanivel (Wichita State University, 2010-12)

Segmented chips that arise as a result of formation of adiabatic shear bands are common in high-speed machining of harder alloys. Analytical models describing the mechanics of segmented chip formation have been developed, ...
Oblique machining of uni directional carbon fiber reinforced polymer composites

Gudimani, Gurusiddeshwar (Wichita State University, 2011-05)

Composite materials have a wide range of applications in aerospace and automotive industries due to the advantage of their tailorability when manufacturing. These materials are manufactured near net shape but post-production ...
Obstacle adaptive approaches for distributed task assignment in autonomous mobile robots

Kavala, Syam (Wichita State University, 2009-07)

It has many challenges to assign a group of mobile robots to individual targets according to the specific constraints. In addition to the group behavior constraints (one-toone or one-to-many) of the task assignment, some ...
Online aerodynamic parameter estimation for a fault tolerant flight control system

Singh, Balbahadur (2005-12)

Wichita State University (WSU) and Raytheon Aircraft Company are working toward the development of a flight control system to reduce the workload for a pilot under normal as well as deteriorated flight conditions. An ’easy ...
On the improvement of permeability assessment of fibrous materials

Sharma, Sanjay (Wichita State University, 2010-05)

The focus of this work is to understand the current state of permeability measurement and prediction methods for fibrous, porous media and to suggest improvements. For this purpose the most widely used and accepted ...
An ontology for a lean supply chain

Khanna, Nitin (Wichita State University, 2007-12)

In today’s completive manufacturing environment supply chains are spread across the oceans. For a large number of companies lean effort means closely examining the factory floor processes to pull the work. In reality the ...
Operational methods and models for minimization of energy consumption in a manufacturing environment

Mouzon, Gilles C. (Wichita State University, 2008-05)

This dissertation develops operational methods for minimization of energy consumption of manufacturing equipments. Using the frameworks developed, a significant amount of energy can be saved when non-bottleneck and/or ...