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Now showing items 11-20 of 24
Near Wall Structure and Deviation from Equilibrium in Wavy Channel Turbulence
(2019-07)
The structure of turbulent flow over non-flat surfaces is a topic of major interest in practical applications in both engineering and geophysical settings. A lot of work has been done in the fully rough regime at high ...
Quadcopter Trajectory Prediction and Wind Estimation Using Machine Learning
(2019-07)
Small unmanned aerial systems are heavily impacted by wind disturbances. Wind causes deviations from desired trajectories, potentially leading to crashes. In this thesis, we consider two inherently related problems: ...
Investigation of SOLIDWORKS Flow Simulation as a Valid Tool for Analyzing Airfoil Performance Characteristics in Low Reynolds Number Flows
(2019-05-01)
The majority of unmanned aerial vehicles active currently and projected to be active in the future, operate within a low Reynolds number flow regime due to their size and flight envelope. As their popularity and applicability ...
Investigation of Low-Profile Vortex Generators via Experimental Methods
(2019-07)
A novel low-profile vortex generator has recently demonstrated fuel savings of 1% on commercial aircraft. It has been termed a Conformal Vortex Generator (CVG) and consists of a backward facing step where the chord position ...
Portable Recovery System for an Unmanned Aircraft with a Straight Wing and a Tractor Propeller
(2019-07)
The recovery system development effort for an unmanned aircraft (UA) has been documented and examined. The development effort existed to satisfy a customer's need to recover an 80 lb aircraft on unimproved terrain. The ...
Design and development of a controllable wing loading unmanned aerial system
(2019-12)
Vertical takeoff and landing (VTOL) unmanned aerial systems (UAS) offer all the benefits of wing borne flight without the need for conventional takeoff and landing (CTOL) infrastructure. There exists many effective VTOL ...
Turboprop performance and acoustic evaluation for a small unmanned aircraft variable-cycle engine
(2019-05)
Range and endurance of small unmanned aircraft systems (sUAS) driven by gas turbine engines are constrained by high thrust specific fuel consumption (TSFC) resulting from low overall efficiency. This study evaluates the ...
Characterization of degraded drag-reducing polymer solution and its impact on the structure of turbulence
(2019-12)
Turbulence is often described in terms of either a random process or interacting coherent structures, which is really a choice of which parts of the turbulence to ignore. Focusing on coherent structures reducing the ...
Development of a Detailed Heat Pump Simulation Controls Testbed
(2019-07)
In order to increase energy efficiency, it is desirable to reduce power consumption of HVAC systems. One way to reduce power consumption is through careful control of system components. To this end, this work covers the ...
Design, development, and validation of a low-cost measurement system for residential ground source heat pump systems
(2019-12)
There is still relatively little data available to properly analyze the performance of Ground Source Heat Pump (GSHP) systems in residential applications. While commercial-grade instrumentation is available, it is often ...