Open Access. Powered by Scholars. Published by Universities.®
Navigation, Guidance, Control and Dynamics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Navigation, Guidance, Control and Dynamics
Experimental Investigation Of Active Control Of Bluff Body Vortex Shedding, Ilteris Koc
Experimental Investigation Of Active Control Of Bluff Body Vortex Shedding, Ilteris Koc
Mechanical & Aerospace Engineering Theses & Dissertations
Mean and fluctuating forces acting on a body are strongly related to vortex shedding generated behind it. Therefore, it is possible to obtain substantial reductions of at least the unsteady forces if vortex shedding is controlled or its regularity is reduced. While conventional active flow control methods are mainly concerned with direct interaction with, and alteration of, the mean flow about a body, modern techniques involve altering existing flow instabilities using relatively small inputs to obtain large-scale changes of mean flows. Aerodynamic flow control may be intended to delay or suppress boundary layer separation through creation of a boundary layer …
Micron-Level Actuator For Thermal-Fluid Control In Microchannels, Nurhak Erbas
Micron-Level Actuator For Thermal-Fluid Control In Microchannels, Nurhak Erbas
Mechanical & Aerospace Engineering Theses & Dissertations
Effectiveness of an actuator is investigated for thermal-flow control in microchannels. First, simulations of a single actuator in a quiescent external medium are performed in order to study the parameters characterizing the synthetic jet flow from the actuator. For this purpose, a simplified, two-dimensional configuration is considered. The membrane motion is modeled in a realistic manner as a moving boundary in order to accurately compute the flow inside the actuator cavity. The geometric and actuation parameters of the actuator are investigated to define the effectiveness of the jet flow. The study is done initially at macro scales. Then, the flow …