Browsing Aerospace, Mechanical & Electronic Engineering ITC by Title
Now showing items 1-20 of 38
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An assessment of radiation models utilized in CFD for thermal and fluid analysis in interior building spaces with large glazing
(AIP Publishing, 2023)This paper investigates the effects of using the S2S and the DO method in the CFD simulation of a cavity to identify a convenient model for simulating radiative heat transfer. A 3D model for an office room fitted with a ... -
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 ... -
A concept of aerospike nozzle for cold spray additive manufacturing: towards a potential solution for preventing the issue of clogging
(ASM International, 2023-05-22)The clogging, a frequent gas passage deformation phenomenon because of powder accumulation on inner nozzle wall, is a major issue in long duration Cold Spray (CS) operations and a major challenge for Cold spray technology ... -
Detached eddy simulation of unsteady flow over a frontal cavity
(American Institute of Aeronautics and Astronautics, 2023)Frontal cavity consists of complex unsteadiness which causes bow shock instabilities when the body is moving at supersonic or hypersonic speed through a fluid. These complex unsteady flow fields are an important practical ... -
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. ... -
Effects of freestream disturbances in front of spiked blunt nose at hypersonic flow
(Council of European Aerospace Societies, 2021)The effects of high frequency slow and fast acoustic wave freestream disturbances are modelled in front of pulsating bow shock formed at spiked blunt nose in hypersonic flow. These disturbances are introduced as time-dependent ... -
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 ... -
Investigation of a modified circular nozzle for cold spray applications
(ASM International, 2023-05-22)The current work numerically evaluates the efficacy of a coflowing nozzle for cold spray applications with the aim to mitigate nozzle clogging by reducing the length of its divergent section. The high-pressure nitrogen ... -
Mach number dependence of flow instability around a spiked body
(AIP Publishing, 2023-05-05)A forward-facing aerospike have been identified as a passive flow control device for enhancing the aerodynamic efficiency and reducing the heat transfer in high-speed flows. In addition, it has been reported that the ... -
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 ...
