Browsing Aerospace, Mechanical & Electronic Engineering ITC by Title
Now showing items 1-20 of 23
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CFD-CRN Study of NOx formation in a high-pressure combustor fired with lean premixed CH4 / H2 - air mixtures
(The American Society of Mechanical Engineers, 2021-01)The main motivation of this study is to investigate detailed NOx and CO formation in high-pressure dump combustor fired with lean premixed methane-air mixture using CFD-CRN hybrid approach. Further, this study is extended ... -
Commencement measurements giving fundamental surface tension determinations in tensiometry
(IOP Publishing, 2011)This study provides experimental testing of a ray-tracing model of the tensiotrace that explores the measurement potential of a well-defined optical position in the tensiotrace signal known as the 'commencement'. This point ... -
Drag control by hydrogen injection in shocked stagnation zone of blunt nose
(IOP Publishing, 2021)The main motivation of the current study is to propose a high-pressure hydrogen injection as an hybrid active flow control technique in order to manipulate the flow-field in front of a blunt nose during hypersonic flight. ... -
Enabling models of Internet eXchange Points for developing contexts
(Elsevier, 2020-10-24)In 2009, fibre-optic cables landed on the East coast of Africa, the last major area of the world to be connected to the Internet triggering a decade of Internet development (Graham et al., 2015). During the same period, ... -
Experimental observations with ultra-speed imaging revealing new complex detail of drop separation processes from a large diameter drophead
(IOP Publishing, 2011)An ultraspeed (5000 frames a second) camera has been used to record the drop separating from the photometric instrument the tensiograph. New insights into drop separation processes which have been evaluated in terms of the ... -
Flow-field and performance study of coaxial supersonic nozzles operating in hypersonic environment
(Praise Worthy Prize, 2020)The integration of multiple propulsion systems in a coaxial configuration is one of the challenges to realize hypersonic passenger transportation. This study is an attempt to understand the performance of two co-axial jets ... -
Fundamental limits of measurement in telecommunications: Experimental and modeling studies in a test optical network on proposal for the reform of telecommunication quantitations
(IOP Publishing, 2011)Proposals for a review of the limits of measurement for telecommunications are made. The measures are based on adapting work from the area of chemical metrology for the field of telecommunications. Currie has introduced ... -
A game assessment metric for the online gamer
(Faculty of Electrical Engineering and Computer Science - Stefan cel Mare University of Suceava, Romania, 2007)This paper describes a new game assessment metric for the online gamer. The metric is based on a mathematical model currently used for network planning assessment. Beside the traditional network-based parameters such as ... -
High order mismatch shaping for low oversampling rates.
(IEEE, 2019-03-11)Delta Sigma data converters employing high order dynamic element matching (DEM) allow for accurate signal conversion in the presence of DAC mismatch. However, at low oversampling rates, current high order DEM decoders ... -
The impact of thermal degradation on properties of electrical machine winding insulation material
(IEEE, 2016)Interturn stator short circuits can develop quickly leading to serious damage of an electric machine. However, degradation mechanisms of winding insulation material are not yet fully understood. Therefore, the main ... -
The Internet in East Africa: a mixed methods study
(East African Journal of Science, Technology and Innovation, 2020)East Africa was the last major area of the world to gain access to the Internet when submarine fibre-optic cables landed at Mombasa, Kenya and Dar-es-Salaam, Tanzania in 2009. The region previously relied on satellite ... -
Microfluidics in haemostasis: A review
(MDPI, 2020)Haemostatic disorders are both complex and costly in relation to both their treatment and subsequent management. As leading causes of mortality worldwide, there is an ever-increasing drive to improve the diagnosis and ... -
A new optical method of continuously analysing the surface properties of a single pendant drop while obtaining quality bulk spectral and refractive index measurements of the liquid-under-test
(IOP Publishing, 2009)The classical stalagmometer has been replaced by the tensiometer to measure surface properties from drop volume. From the drop period T1, converted into volume, the surface properties of the liquid can be obtained. In the ... -
Novel mechanism of instability control using tapered spike in hypersonic flow
(American Institute of Aeronautics and Astronautics, 2021-08-02)A forward facing spiked blunt nose in high-speed flows is associated with pulsating flow behavior of varying amplitudes depending on spike-nose and length, the forebody geometry and flow conditions. A tapered spike has ... -
Numerical investigation of detonation propagation through small orifice holes
(Sciendo, 2021)Seeking to better understand the physical phenomena underlying detonation wave propagation through small holes (especially the phenomenon of detonation re-initiation or its failure), we investigated the propagation of a ... -
Oblique Detonation Wave Control with O3 and H2O2 Sensitization in Hypersonic Flow
(MDPI journals, 2022-06-04)This numerical study investigates the effects of adding a small amount of ignition promoters for controlling the wedge-induced oblique shock wave (OSW) to oblique detonation wave (ODW) transition in a premixed hydrogen–air ... -
On unsteady flow analysis of a round spike blunt nose afterbody in mach 6 flow
(IOP Publishing Ltd, 2021)An aerospike, in front of a blunt body, has largely been deemed as a key passive control device for effectively reducing the wave drag and aerodynamic heating associated with high-speed flows. In addition, it has been ... -
An Open-Source Testbed to Visualise ICS Cybersecurity Weaknesses and Remediation Strategies – A Research Agenda Proposal
(IEEE, 2021-07)Industrial Control Systems (ICS) are responsible for the control of several processes in various critical infrastructure deployments ranging from energy, power and water utilities, to manufacturing sectors such as ... -
Particle Acceleration Through Coaxial Co-Flow Nozzles for Cold Spray Applications
(ITSC 2022 Thermal Spray Conference and Exposition, 2022)The present study numerically investigates the effectiveness of co-flowing nozzle for cold spray application. A convergent - divergent axi-symmetric nozzles have been simulated with high-pressure nitrogen flow. The particle ... -
Pulsating flow investigation for spiked blunt-nose body in hypersonic flow and its control
(American Institute of Aeronautics and Astronautics, 2021-01)An aerospike, as a technique for drag reduction and heat transfer in high-speed flows, is associated with instabilities. To understand the pulsating flow behavior in front of forward facing spiked blunt nose, numerical ...
