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Dissertations / Theses on the topic 'Ground effect'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Read, Gillian Margaret. "Extreme ground effect." Title page, contents and summary only, 1988. http://web4.library.adelaide.edu.au/theses/09PH/09phr284.pdf.

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2

Cai, Jielong. "Changes in Propeller Performance Due to Ground and Partial Ground Proximity." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1588164898961792.

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3

Doig, Graham Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "Compressible ground effect aerodynamics." Awarded by:University of New South Wales. Mechanical & Manufacturing Engineering, 2009. http://handle.unsw.edu.au/1959.4/44696.

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The aerodynamics of bodies in compressible ground effect flowfields from low-subsonic to supersonic Mach numbers have been investigated numerically and experimentally. A study of existing literature indicated that compressible ground effect has been addressed sporadically in various contexts, without being researched in any comprehensive detail. One of the reasons for this is the difficulty involved in performing experiments which accurately simulate the flows in question with regards to ground boundary conditions. To maximise the relevance of the research to appropriate real-world scenarios,

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4

Purvis, Richard. "Rotor blades and ground effect." Thesis, University College London (University of London), 2002. https://ueaeprints.uea.ac.uk/20790/.

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This thesis uses numerical, asymptotic and flow structural techniques to examine various aspects of rotor blade flows and ground effect. It explores two- and three-dimensional flows, generally concentrating upon regimes that have a degree of relevance to typical rotor blade flows. Chapter 2 considers, as a first step towards understanding a general rotor blade system in ground effect, a finite rotating disc near horizontal ground. More specifically, it concentrates on determining the layer shape beyond the disc rim that, due to the presence of the ground, cannot remain flat without violating a

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5

Kusmarwanto, I. "Ground effect on a rotor wake." Thesis, Cranfield University, 1985. http://dspace.lib.cranfield.ac.uk/handle/1826/4545.

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The effect of the ground on a rotor wake in forward flight has been investigated experimentally in the working section of an 8ft x Oft straight-through wind tunnel. A three bladed fully articulated rotor with a solidity ratio of 0.07 and diameter of 1.06m, powered by a hydraulic motor, has been tested at a height of 0.47 rotor diameter above a solid ground board which has an elliptical leading edge. Tests have been run at various low advance ratios (<0.1) with two collective pitch settings. A three-element hot wire anemometer probe has been used to measure the average value of the three compon

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6

Jones, Marvin Alan. "Mechanisms in wing-in-ground effect aerodynamics." Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343624.

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An aircraft in low-level flight experiences a large increase in lift and a marked reduction in drag, compared with flight at altitude. This phenomenon is termed the 'wing-in-ground' effect. In these circumstances a region of high pressure is created beneath the aerofoil, and a pressure difference is set up between its upper and lower surfaces. A pressure difference is not permitted at the trailing edge and therefore a mechanism must exist, which allows the pressures above and below to adjust themselves to produce a continuous pressure field in the wake. It is the study of this mechanism and it

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7

Pulla, Devi Prasad. "A study of helicopter aerodynamics in ground effect." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1149869712.

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8

Molina, Juan. "Aerodynamics of an oscillating wing in ground effect." Thesis, University of Southampton, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.582653.

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This research intends to provide new insight into the aerodynamics of wings in ground effect under dynamic motion. This work represents a new step forward in the field of race car aerodynamics, in which steady aerodynamics are well understood. As the first comprehensive study on oscillating wings in ground effect, several modes of oscillation were studied numerically, including heaving, pitching and combined motion of an airfoil and heaving of a wing fitted with endplates. A wide range of reduced frequencies were tested for the simulations at different ride heights, which showed appreciable di

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9

Roberts, L. S. "Boundary-layer transition on wings in ground effect." Thesis, Cranfield University, 2017. http://dspace.lib.cranfield.ac.uk/handle/1826/12789.

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The competitiveness of a high-performance racing car is extremely reliant on aerodynamics. Due to the current economic climate, track testing is often forsaken and the majority of aerodynamic development carried out using sub-scale wind tunnel testing and computational simulations. It is important, therefore, that experimental and computational approaches represent real-world conditions as closely as possible. Although racing cars travel at much higher speeds than typical passenger cars, in comparison to aircrafts they still operate at relatively low Reynolds numbers and, consequently, laminar

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10

Igue, Roberto T. "Experimental Investigation of a lift augmented ground effect platform." Wright-Patterson AFB, OH : Air Force Institute of Technology, 2005. http://handle.dtic.mil/100.2/ADA440437.

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11

McDarby, John Michael. "Modelling of turbulent rotor-blade flow and ground effect." Thesis, University College London (University of London), 2005. http://discovery.ucl.ac.uk/1444821/.

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Rotor blade flows occur in numerous physical systems from helicopters to fans, and from propellers to food mixers. Many previous studies have concentrated on the laminar flow generated by a set of rotors but in many practical cases the flow is turbulent, a setting in which previous research appears to be mainly experimental or purely numerical. The thesis examines turbulent rotor flow as its prime feature, before moving on to the impact of the ground and side structures on the flow. Whilst there exists a wide variety of rotor blade flows in industry, the present research is motivated by the ap

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12

Law, Rachel Hoi-chee. "Effect of existing building on tunneling-induced ground movements." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74406.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 113-115).<br>The goal of this thesis is to assess the influence of an existing structure on tunneling-induced ground movements. This is accomplished through 2D numerical simulations that are compared with similar prior studies reported by Potts and Addenbrooke (1997). The current study uses the Plaxis finite element code together with the Hardening Soil (HS and HSS) family of constitutive models in order

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13

Mahon, Stephen Alexander. "The aerodynamics of multi-element wings in ground effect." Thesis, University of Southampton, 2005. https://eprints.soton.ac.uk/47619/.

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14

Ehirim, Obinna Hyacinth. "Aerodynamics and performance enhancement of a ground-effect diffuser." Thesis, Cranfield University, 2018. http://dspace.lib.cranfield.ac.uk/handle/1826/13211.

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This study involved experimental and equivalent computational investigations into the automobile-type 3―D flow physics of a diffuser bluff body in ground-effect and novel passive flow-control methods applied to the diffuser flow to enhance the diffuser’s aerodynamic performance. The bluff body used in this study is an Ahmed-like body employed in an inverted position with the slanted section together with the addition of side plates along both sides forming the ramped diffuser section. The first part of the study confirmed reported observations from previous studies that the downforce generated

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15

Mirghasemi, Seyed Alireza. "Fractional Order Controller for Quadcopter Subjected to Ground Effect." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39252.

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Although the concept of fractional calculus was known for centuries, it was not considered in engineering due to the lack of implementation tools and acceptable performance of integer order models and control. However, recently, engineers and researchers started to investigate the potentially high performance of fractional calculus in various fields among which are acoustics, conservation of mass, diffusion equation and specifically in this thesis control theory. The intention of this thesis is to analyze the relative performance of fractional versus integer order PID controller for a quadcopt

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16

Caporaletti, Paola. "Tunnelling in layered ground and its effects on pre-existing masonry structures." Doctoral thesis, La Sapienza, 2005. http://hdl.handle.net/11573/917015.

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The research described in this dissertation concerns the soil movements due to tunnelling in two layers ground condition and its effects on pre-existing historical structures. In this introductory chapter the objectives and background of the work are presented, followed by an overview of the methodology used to investigate the problem and an outline of the following chapters.

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17

Pouloupatis, Panayiotis. "Determination of the thermal characteristic of the ground in Cyprus and their effect on ground heat exchangers." Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/10982.

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Since the ancient years, human beings were using holes and caves to protect themselves from weather conditions making it the first known form of exploiting ground’s heat, known as Geothermal Energy. Nowadays, geothermal energy is mainly used for electricity production, space heating and cooling, Ground Coupled Heat Pump (GCHP) applications, and many other purposes depending on the morphology of the ground and its temperature. This study presents results of investigations into the evaluation of the thermal properties of the ground in Cyprus. The main objectives were i) to determine the thermal

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18

Zhou, Jian Mei. "Effect of nonlinear soil modeling on ground response at Macau." Thesis, University of Macau, 2010. http://umaclib3.umac.mo/record=b2182936.

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19

Phillips, Catriona. "Computational study of rotorcraft aerodynamics in ground effect and brownout." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/1783/.

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When helicopters operate close to the ground in desert conditions, the rotor wake can entrain large amounts of dust into the flow field surrounding the aircraft. This entrainment of dust can result in the potentially dangerous condition known as brownout where the pilot loses situational awareness. Understanding the physics that governs the entrainment of dust from the ground may eventually allow the condition of brownout to be avoided completely. To enable the formation of dust clouds around helicopters to be investigated, Brown's Vorticity Transport Model~(VTM) has been enhanced to include t

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20

Han, Wu M. Eng Massachusetts Institute of Technology. "Effect of ground motion frequency on non-structural seismic damage." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/99622.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 88).<br>The need for economic consideration in structural design triggered the emergence of performance-based design to minimize material waste while achieving better performance. The displacement measurements of structures are significant to structural damage evaluation, and most seismic design methods consider the effect of peak ground acceleration, while the frequency content of seismic activiti

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21

Schembri-Puglisevich, Lara. "Large eddy simulation for automotive vortical flows in ground effect." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12555.

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Large Eddy Simulation (LES) is carried out using the Rolls-Royce Hydra CFD code in order to investigate and give further insight into highly turbulent, unsteady flow structures for automotive applications. LES resolves time dependent eddies that are modelled in the steady-state by Reynolds-Averaged Navier-Stokes (RANS) turbulence models. A standard Smagorinsky subgrid scale model is used to model the energy transfer between large and subgrid scales. Since Hydra is an unstructured algorithm, a variety of unstructured hexahedral, tetrahedral and hybrid grids are used for the different cases inve

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22

Fohring, Dora. "The effect of scintillation on ground-based exoplanet transit photometry." Thesis, Durham University, 2014. http://etheses.dur.ac.uk/10954/.

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In this thesis, the effect of scintillation arising from atmospheric optical turbulence on exoplanet transit and secondary eclipse photometry is examined. Atmospheric scintillation arises from the propagation of phase aberrations resulting from wavefront perturbations due to optical turbulence high in the atmosphere. Scintillation causes intensity variations of astronomical targets, which is a problem in exoplanet transit photometry, where the measurement of a decrease in brightness of 1% or less is required. For this reason, ground-based telescopes have inferior photometric precision compared

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23

Ockfen, Alex Earle. "Viscous modeling of ground effect aerodynamics of airfoil and jet." Pullman, Wash. : Washington State University, 2008. http://www.dissertations.wsu.edu/Thesis/Fall2008/a_ockfen_112408.pdf.

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Thesis (M.S. in mechanical engineering)--Washington State University, December 2008.<br>Title from PDF title page (viewed on Dec. 31, 2008). "School of Mechanical and Materials Engineering." Includes bibliographical references (p. 149-154).

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24

Zerihan, Jonathan. "An investigation into the aerodynamics of wings in ground effect." Thesis, University of Southampton, 2001. https://eprints.soton.ac.uk/426058/.

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The aerodynamics of wings in ground effect has been studied using experimental and computational methods. Wind tunnel tests were used to quantify the effect of the ground on the aerodynamic performance of a wing, with the suction surface nearest to the ground. Features of the flowfield around the wing were investigated using Laser Doppler Anemometry and Particle Image Velocimetry to map the wake at the centre of the wing, and the state of the tip vortex. Initially, a single element configuration was used, both under transition free and transition fixed conditions. The application of Gurney fla

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25

Adhynugraha, Muhammad Ilham. "Longitudinal dynamics of wing in ground effect craft in waves." Thesis, Cranfield University, 2017. http://dspace.lib.cranfield.ac.uk/handle/1826/13095.

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An assessment of the longitudinal motion of a hybrid configuration called the aerodynamically alleviated marine vehicle (AAMV) with the presence of waves, is demonstrated in the thesis. The development of this type of vehicle requires a mathematical framework to characterise its dynamics with the influence of external forces due to the waves’ motion. An overview of the effect of waves towards the models of dynamics developed for wing in ground effect (WIGE) craft and high-speed marine vehicles (planing craft) is carried out. However, the overview only leads to a finding that the longitudinal s

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26

Standingford, David William Fin. "Optimal lifting surfaces, including end plates, ground effect & thickness /." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phs785.pdf.

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27

Walter, Daniel James, and Daniel james walter@gmail com. "Study of aerofoils at high angle of attack in ground effect." RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2007. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080110.145138.

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Aerodynamic devices, such as wings, are used in higher levels of motorsport (Formula-1 etc.) to increase the contact force between the road and tyres (i.e. to generate downforce). This in turn increases the performance envelope of the race car. However the extra downforce increases aerodynamic drag which (apart from when braking) is generally detrimental to lap-times. The drag acts to slow the vehicle, and hinders the effect of available drive power and reduces fuel economy. Wings, in automotive use, are not constrained by the same parameters as aircraft, and thus higher angles of attack can b

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28

Al-Hammoud, Abdullah. "Effect of joint design on vehicle bodyshell stiffness." Thesis, Loughborough University, 1985. https://dspace.lboro.ac.uk/2134/10336.

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The work presented in this thesis is an investigation into vehicle bodyshell structural joints, with the aim of improving their stiffness. The bodyshell joint is defined to be an area or sub-structure containing the intersection of beam-type members, the behaviour of which may be defined by a matrix determined experimentally or analytically by using the finite element method. An actual bodyshell was tested on a suitably designed rig and the primary displacement modes affecting the steady state and vibration response of a bodyshell were identified and the relevant stiffness measured by using a

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29

Ganesh, Balakrishnan. "Unsteady aerodynamics of rotorcraft at low advance ratios in ground effect." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-03072006-145825/.

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Thesis (Ph. D.)--Aerospace Engineering, Georgia Institute of Technology, 2006.<br>Narayanan Komerath, Committee Chair ; Lakshmi Sankar, Committee Member ; JVR Prasad, Committee Member ; Mark Costello, Committee Member ; A. Terrence Conlisk Jr., Committee Member.

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30

Senior, Andrea Elizabeth. "The aerodynamics of a diffuser equipped bluff body in ground effect." Thesis, University of Southampton, 2002. https://eprints.soton.ac.uk/47113/.

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An investigation of the flow physics of a diffuser equipped bluff body in ground effect has been undertaken. Situated at the rear of a racing car undertray, the diffuser is an important component and the least understood part of the vehicle. Diffuser performance can change dramatically with vehicle ride height. This includes a significant loss in performance at low ride heights which can also be a serious vehicle safety issue. An increased understanding of the diffuser behaviour in ground effect is required to assist design improvements. An accurate experimental database of the flow field is n

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31

Raikhola, Sagar Singh. "EFFECT OF DIFFERENT BASELINE CORRECTION METHODS ON THE GROUND ACCELERATION SIGNAL." OpenSIUC, 2019. https://opensiuc.lib.siu.edu/theses/2526.

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The main objective of this study is to compare the effect of different baseline correction methods on the ground acceleration signal and on the seismic response of structures. Three for strong ground motion processing methods, namely, Chiu, Akkar and EERL methods were selected in this study. For each method, a MATLAB code was written, and used in processing ground motions recorded at Belmont, IL and Gorkha, Nepal. The processed acceleration, velocity and displacement time histories obtained from the MATLAB Code were compared to the time histories provided on the USGS website. Next, the eff

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32

Fairbanks, Bonnie Marie Dobson F. Stephen. "Vigilance in Columbian ground squirrels the effects of kinship and mechanisms of the group-size effect /." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2005%20Fall/Thesis/FAIRBANKS_BONNIE_53.pdf.

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33

Archila, Manuel. "Nonlinear response of high-rise buildings: effect of directionality of ground motions." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/33949.

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The response of high-rise buildings to strong ground shaking depends on ground motion parameters namely: intensity, frequency content, duration and horizontal ground motion directionality. The latter has been a concern to engineers for several decades in seismic design. The prediction of the direction where ground motion will hit the building is rendered difficult because in many regions faults are not mapped to a great extent, and for regions were fault locations are known accurate prediction of ground motion directionality is impeded because ground motions have unique wave propagation charac

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34

Xin, Hong. "Development and validation of a generalized ground effect model for lifting rotors." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/11880.

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35

Chierico, Paul Stephen. "An Investigation into Ground Effect for an Underwater Biologically Inspired Flapping Foil." Thesis, University of Rhode Island, 2014. http://hdl.handle.net/10945/44417.

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CIVINS<br>The topic that was investigated was whether there is a lift and thrust benefit to flapping an underwater, biologically inspired three dimensional foil near the solid bottom surface (so that it was in ground effect). The experimental method used a dual canister device that allowed actuation in roll and pitch, with force sensors attached to the pitch shaft, in order to record the forces produced by the foil as it flapped. The dual canister was towed on a carriage at a constant speed in a large tow tank that had been configured to have a long run of constant, deep water depth, a

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36

Nishino, Takafumi. "Dynamics and stability of flow past a circular cylinder in ground effect." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/49931/.

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A combined experimental, computational and theoretical study is presented on the dynamics and stability characteristics of turbulent flow past a circular cylinder placed near and parallel to a moving ground. The study consists of four main parts: (i) wind tunnel experiment, (ii) numerical simulation, (iii) linear stability analysis, and (iv) proper orthogonal decomposition (POD) analysis. The main focus of the study is on the cessation of large-scale, von Karman-type vortex shedding in 'ground effect', i.e., the cessation observed when the cylinder comes close to the ground. The experiments, p

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37

Pavlenko, Vasily. "Ground motion variability and its effect on the probabilistic seismic hazard analysis." Thesis, University of Pretoria, 2016. http://hdl.handle.net/2263/60850.

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The majority of injuries and casualties during earthquakes occur as a result of partial or complete collapse of buildings. The assessment of possible seismic ground motions for the purposes of earthquake-resistant design can be performed by following the deterministic or probabilistic methodology. Chapter 1 presents an overview of the current practice in seismic hazard analysis with emphasis on PSHA. At present, the Cornell-McGuire method prevails in PSHA studies. Despite significant development and modifications, this method has several controversial aspects. Absence of an upper bound

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38

Fernández, Prats Rafael. "Hydrodynamics of pitching foils: flexibility and ground effects." Doctoral thesis, Universitat Rovira i Virgili, 2015. http://hdl.handle.net/10803/296444.

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En termes de propulsió la rigidesa flexural i l'efecte terra en una placa rectangular en piteig pur han estat investigats. Velocimetria per imatges per partícules, mesures de forces i moments amb una cèl·lula de carga de 6 eixos, mesures de velocitat i adquisició d'imatges de la cinemàtica de la placa han estat realitzades per estudiar els patrons de flux i les forces hidrodinàmiques en plaques de diferent flexibilitat. La presència de la paret va millorar la velocitat de creuer fins a un 25% i l'empenta fins a un 45% per angles escombrats de 160 i 240 graus. El mecanisme físic sota aquest e

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39

Adam, Fatima. "Quantification of the effect of air traffic on terminal precinct ground traffic and the corresponding ground traffic effect on kerbside and parking infrastructure requirements at O.R. Tambo International Airport." Master's thesis, University of Cape Town, 2008. http://hdl.handle.net/11427/9991.

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The sharp increase in travel demand at ORTIA in recent years has been translated into frequent parking supply and kerbside pick-up/drop-of bay shortages, particularly during peak periods. This often results in long delays and increased frustration among those using these facilities. In an attempt to solve the terminal precinct congestion problems currently experienced at O.R.Tambo International Airport (ORTIA), a need exists to understand parking and kerbside drop-off/pick-up bay demand, so that infrastructure investment corresponds to this demand.

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40

Smith, Justin L. "Computational analysis of airfoils in ground effect for use as a design tool." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5291.

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Thesis (M.S.)--West Virginia University, 2007.<br>Title from document title page. Document formatted into pages; contains viii, 59 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 51-52).

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41

Nathan, Nita Darshini. "The rotor wake in ground effect and its investigation in a wind tunnel." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/1821/.

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Rotorcraft operating in ground effect have been known to experience beneficial performance effects as well as operational difficulties during low speed forward flight. While these have been attributed to the formation of the ground induced wake, limited experimental investigations of the wake have been conducted. Difficulties in re-creating representative forward flight ground boundary conditions in wind tunnels have meant a lack of quantitative information on the ground effect wake. This research is based on experimentally investigating the ground effect wakes of rotors in forward flight, to

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42

Moore, Nicholas John. "An experimental investigation into wing in ground effect over flat and wavy surfaces." Thesis, University of Southampton, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419402.

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43

Black, Sean C. E. "The effect of abrasive properties on the surface integrity of ground ferrous materials." Thesis, Liverpool John Moores University, 1996. http://researchonline.ljmu.ac.uk/5100/.

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The effect of the thermal properties of alumina and CBN abrasives on workpiece temperatures in grinding was investigated. A review of the literature revealed a lack of knowledge of the thermal properties of CBN limiting the accuracy of theoretical predictions of the heat conduction in CBN grinding. A grain contact analysis was developed to predict the energy partitioning between the workpiece and wheel. The analysis takes into account two dimensional transient heat transfer in the grain and maintains temperature compatibility at the grain wear flatworkpiece interface. The proportion of the tot

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44

Heyder-Bruckner, Jacques. "The aerodynamics of an inverted wing and a rotating wheel in ground effect." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/207263/.

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This study investigates the aerodynamics of nil inverted wing in ground effect, a race car wheel and the interaction between the two components, using numerical and experimental methods. The wheels were located behind the wing at flU overlap and gap of 20mm, and the wing ride height. iu the vertical direction was the primary variable. Models of 50% scale were used , giving a Reynolds number of 5.8 x 105 based on the wing chord . The Detached-Eddy Simulation model was validated against wind tunnel measurements including PIV, surface pressures and forces , where it was found to outperform a Reyn

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45

Bleischwitz, Robert. "Fluid-structure interactions of membrane wings in free-flight and in ground-effect." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/397261/.

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Currently, there is a growing demand to improve the aerodynamic performance of Micro-Air-Vehicles for extended mission time, higher payload capacity and improved agility. Their wings have to operate within a challenging Reynolds number regime of Re =10(4)-10(5) which is known for its low energy content in the boundary layer, causing early flow separation and loss in lift production. Flexible wings, inspired from bats, could potentially exploit given flow separations by forming lift carrying shedding structures close to the upper wing surface. The aspect-ratio is one key parameter which modifie

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46

Kim, Changmin. "Effect of Iron on Residual Nitrite Level in Ground Pork and Model Systems." DigitalCommons@USU, 1985. https://digitalcommons.usu.edu/etd/5302.

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The effects of iron, temperature, and presence of botulinal spores or sodium ascorbate on depletion of nitrite level were determined in meat and model systems. Higher temperature and presence of botulinal spores definitely increased nitrite depletion in a meat system. Added hemoglobin also significantly increased nitrite depletion, while ferrous iron and ferric iron did not significantly decrease nitrite level in a meat system. High temperature and presence of sodium ascorbate increased nitrite depletion in a model system. Only ferrous iron significantly decreased nitrite level in the absence

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47

Eberhart, Gina M. "Modeling of Ground Effect Benefits for Multi-Rotor Small Unmanned Aerial Systems at Hover." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1502802483367365.

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48

Mondal, Partha. "Wing in Ground Effect." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/2848.

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The thesis presents a two pronged approach for predicting aerodynamics of air- foils/wings in the vicinity of the ground. The ﬁrst approach is eﬀectively a model for ground eﬀect studies, employing an inexpensive Discrete Vortex Method for the 2D pre- dictions and the well known Numerical lifting line theory for the 3D predictions. The second one pertains to the dynamic ground eﬀect analysis which employs the state of the art moving mesh methodology based time accurate CFD. In that sense, the thesis deals with two ends of spectrum in the ground eﬀect analysis; one, a model to be used in the co

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49

Mondal, Partha. "Wing in Ground Effect." Thesis, 2013. http://etd.iisc.ernet.in/handle/2005/2848.

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Abstract:

The thesis presents a two pronged approach for predicting aerodynamics of air- foils/wings in the vicinity of the ground. The ﬁrst approach is eﬀectively a model for ground eﬀect studies, employing an inexpensive Discrete Vortex Method for the 2D pre- dictions and the well known Numerical lifting line theory for the 3D predictions. The second one pertains to the dynamic ground eﬀect analysis which employs the state of the art moving mesh methodology based time accurate CFD. In that sense, the thesis deals with two ends of spectrum in the ground eﬀect analysis; one, a model to be used in the co

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50

Chen, Hen-Chung, and 陳恆權. "Ground Effect of 3D Subsonic Flying Vehicle." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/20365210365714526486.

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Abstract:

碩士<br>國立成功大學<br>航空太空工程學系<br>84<br>The objective of the present research is to study the ground effect of a low-flying three-dimensional subsonic vehicle. Morino''s panel method and the method of image were used as the analysis tool. The ground effect can be decomposed into steady and unsteady parts using the superposition principle. The steady ground effect is attributed to the height of a flying vehicle in the proximity over a flat ground. It was found in the s

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