Browsing by Author "Lu, Frank"
Now showing items 1-20 of 41
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AN EXPLORATORY STUDY ON CONTINUOUS WAVE LASER AND HIGH-SPEED CAMERA COMBINATION IN PLANAR PARTICLE IMAGE VELOCIMETRY FOR LOW SPEED FLOWS
Gencler, Bunyamin; 0000-0001-8951-8452 (2019-09-06)This study investigates the feasibility of using continuous wave lasers and high-speed CMOS cameras together in 2D particle image velocimetry (PIV) which is a widely-used non-intrusive method in experimental aerodynamics. ... -
Analysis Of Pulse Detonation Turbojet Engines
Vutthivithayarak, Ronnachai (Aerospace Engineering, 2012-04-11)Research over the last two decades has shown the potential advantages of pulse detonation engines (PDEs) over existing aero-engines in terms of improved thermodynamics efficiency, improved thrust performance, simplicity ... -
Characterization Of UTA Hypersonic Shock Tunnel
Leamon, Derek Glenn (Aerospace Engineering, 2013-03-20)Characterization of a hypersonic shock tunnel was performed under low enthalpy conditions. A rake was designed and fabricated to measure pitot pressure and heat flux at three axial locations in the test section. Pitot ... -
Design, Calibration And Testing Of A Force Balance For A Hypersonic Shock Tunnel
Vadassery, Pravin (Aerospace Engineering, 2012-07-25)The forces acting on a flight vehicle are critical for determining its performance. Of particular interest is the hypersonic regime. Force measurements are much more complex in hypersonic flows, where those speeds are ... -
The Development And Testing Of Pulsed Detonation Engine Ground Demonstrators
Panicker, Philip Koshy (Aerospace Engineering, 2008-09-17)The successful implementation of a PDE running on fuel and air mixtures will require fast-acting fuel-air injection and mixing techniques, detonation initiation techniques such as DDT enhancing devices or a pre-detonator, ... -
Development Of Spectral And Wavelet Time-of-flight Methods For Propagating Shock And Detonation Waves
Ortiz, Alfredo Albert (Aerospace Engineering, 2009-09-16)An accurate time delay estimate for a propagating disturbance, including an estimate of its uncertainty, is important in many areas of science. Several techniques were developed for determining the propagation time of a ... -
Direct Numerical Simulation of Homogeneous Isotropic Turbulence - A Methodology and Applications
Hussein, Sarah Moussa (2018-12-13)Turbulence has been a topic of scientific research for years. Characterized by unorganized chaotic motion and irregular fluctuations, it persists as one of the most challenging topics in fluid mechanics despite volumes of ... -
Direct Numerical Simulation Of Interaction Of Detonation Wave With Homogeneous Isotropic Turbulence
Nagarajan, Hari Narayanan (Aerospace Engineering, 2009-09-16)The propagation of a shock or detonation wave through a reactive mixture has been the subject of research for over a century. The basic understanding has been shaped by one-dimensional Euler models, namely, those of ... -
Effect Of Friction On The Zel'dovich Von Neumann Doring To Chapman Jouguet Transition
Rao, Sushma (Aerospace Engineering, 2010-11-01)Detonation theory proposes Chapman-Jouguet state of equilibrium due to the sonic speed of the products relative to the wave. Experimental observations however indicated the existence of a sub-Chapman-Jouguet state. The ... -
Electromagnetic Flow Control: A Review And Experimental Development And Testing Of A Compact Actuator
Braun, Eric (Aerospace Engineering, 2009-09-16)This thesis is divided into two sections which both relate to the field of magnetohydrodynamics and particularly electromagnetic flow control (EMFC). The first section contains a review of recent research in EMFC. The ... -
Exergy Analysis of a Pulse Detonation Engine Linear Power Generator
Bello, Raheem Temitope (2016-05-11)The fuel efficiency of a power generator is a key metric for evaluating its performance. The common engineering practice is to determine the thermal efficiency of the system by applying the conservation of energy also known ... -
An Experimental Investigation Of Ionization Of Supersonic Air By A Corona Discharge
Satyanand, Udyavar S. (Aerospace Engineering, 2007-08-23)A technique is developed to ionize supersonic air flow in a shock tube by a weak corona discharge. The driven section of the tube is open to the atmosphere. The shock propagates in the driven section at about 1 km/s by ... -
Experimental Study Of Micro-vortex Generators At Mach 2.5
Pierce, Adam J. (Aerospace Engineering, 2011-03-03)Vortex generators are geometrical shapes that produce trailing vortices and are widely used for their ability to improve the flow quality over areas where flow separation may occur. Current topics involve utilizing the ... -
Exploratory Studies Of Convective Flows Due To Arc Tracking
Mitchell, Richard R (Aerospace Engineering, 2007-09-17)The objective of the research was to develop an understanding of how a flame propagates through an electronic enclosure. FLUENT®, a Navier-Stokes solver, was chosen due to its widespread commercial use, the availability ... -
Fiber-optic Pressure Sensor For Time-of-flight Measurements In A Shock Wave
Jagadevan, Karthikeyan (Aerospace Engineering, 2010-11-01)Fiber-optic sensors are widely employed to detect pressures and temperatures precisely. In particular, MEMS-based Ber-optic sensors are immune to electromagnetic interference but may have limitations at high temperatures ... -
Gasdynamic Phenomena and Propulsive Performance of Pulse Detonation Engines
Peace, James T. (2019-05-10)The pulsed detonation engine (PDE) is an advanced propulsion system that makes use of intermittent detonations to provide thrust. In recent decades, the PDE has been at the center of various propulsion research efforts ... -
Heat Transfer Analysis Of A Pulse Detonation Engine
Kalidindi, Neelima (Mechanical Engineering, 2010-03-03)A thermal analysis of the effect of sensible heat release on the walls of the detonation chamber for stoichiometric mixtures of hydrogen/air, octane/air and octane/oxygen was presented. The detonation tube was assumed to ... -
Ideal Cycle Analysis Of A Regenerative Pulse Detonation Engine For Power Production
Bellini, Rafaela (Mechanical Engineering, 2011-03-03)Over the last few decades, considerable research has been focused on pulse detonation engines (PDEs) as a promising replacement for existing propulsion systems with potential applications in aircraft ranging from the ... -
Image Processing of Triple Shock Wave Evolution
Yarbrough, Katherine (2016-05-10)Shock diamonds occur in over- or under- expanded supersonic flow. They occur in the unsteady jet of a pulse detonation engine, displaying an array of complex features. Due to the highly transient nature of the flow, it ... -
Investigation Of Side Wall Effects On An Inward Scramjet Inlet At Mach Number 8.6
Rolim, Tiago Cavalcanti (Aerospace Engineering, 2013-10-22)Experimental and computational studies were conducted to evaluate the performance of a scramjet inlet as the side cowl length is changed. A slender inward turning inlet with a total length of 304.8 mm, a span of 50.8 mm ...