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Primary And Secondary Flow Structures In A Model Cerebral Aneurysm, Morgan A. Nowak
Primary And Secondary Flow Structures In A Model Cerebral Aneurysm, Morgan A. Nowak
Honors Capstone Projects - All
Cerebral aneurysms affect 5% of western populations and can cause morbidity and mortality if they rupture. Various treatments can be used to minimize the risk of rupture, with new diagnostics and treatments under development that require information from non-invasive techniques such as Particle Imaging Velocimetery (PIV). The current study focused on developing a setup as a basis for future experiments and work on intracranial aneurysms involving PIV. PIV experimentation and data collection were carried out during the summer of 2010 at Ohta Labs of Tohoku University in Sendai, Japan. The experimental setup consisted of a pulsatile flow system, which was …
Development Of A New Mixed Mode I-Ii-Iii Delamination Toughness Test, Ruben Hortensius
Development Of A New Mixed Mode I-Ii-Iii Delamination Toughness Test, Ruben Hortensius
Honors Capstone Projects - All
Optimal use of laminated composite materials can only be achieved if its most common failure mechanisms are well understood. One of the most common modes of failure in laminates is delamination, or the separation of adjacent material layers. Therefore, there is a need to be able to predict a laminated composite’s resistance to delamination growth due to the complex real-world application loadings that it may experience. These complex loadings are made up of three primary modes of delamination growth, known as modes I, II, and III. Test fixtures for a new mixed mode I-II-III delamination toughness test were designed, built, …
Optimization Of Zero Net-Mass Flow Actuators For Aero-Optics Applications, Moira L. Denatale, Jonathan M. Mihaly
Optimization Of Zero Net-Mass Flow Actuators For Aero-Optics Applications, Moira L. Denatale, Jonathan M. Mihaly
Honors Capstone Projects - All
Using experimental methods, zero net-mass flow actuators were optimized to manipulate flow around an airborne laser turret in order to reduce destructive aero-optics effects. Synthetic jets are created by 50 mm and 27 mm piezoelectric disk actuators. Our optimization process involved identifying an actuator’s cavity size, driving frequency, and amplitude to achieve the strongest, most consistent jet possible. The effects of driving a single actuator versus driving two actuators in or out of phase with one another were also investigated. An initial cavity depth was determined using the Helmholtz resonator cavity approximation which estimates the ideal cavity depth for a …