Engineering ITC
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Numerical investigation of non-premixed oblique detonation operations in scramjet combustor
(ICJWSF, 2024-09-23)The present study aims to develop strategies for hydrogen injection to operate scramjet combustor configuration in detonation mode at higher Mach number flights conditions. The reactive multi-species unsteady Navier-Stokes ... -
Numerical study of hydrogen injection to initiate oblique detonation wave
(CEAS, 2024-04-14)With the motivation of operating scramjet in shock induced combustion ramjet (shcramjet) or oblique detonation wave mode, the current study aims to develop strategies for non-premixed oblique detonation wave configuration ... -
Numerical studies of ram-air Intake for near-earth satellites
(American Institute of Aeronautics and Astronautics, Inc., 2024-01)The operation of satellites in Earth orbits with altitudes lower than 450 km involves dealing with rarefied atmosphere environment. To compensate for the aerodynamic drag present in this low-density atmosphere, satellites ... -
Studying the influence of aluminium in ADN/HTPB-based solid propellants
(American Institute of Aeronautics and Astronautics, Inc., 2024-01)Ammonium Dinitramide (ADN) combustion has been the subject of great interest over the past few years due to consideration as a green oxidizer in solid rocket propellants. This study is focused on predicting the flame ... -
Numerical investigation of the impact of injectors location on fuel mixing in the hifire 2 scramjet combustor
(2023)In scramjets, the position and direction of the injectors plays a crucial role for fuel/air mixing and combustion efficiency. Fuel injection is still a potential topic of research to be addressed, in fact an effective ... -
Numerical study of oblique detonation wave control for fuel blends
(2023)The current study is motivated to develop control strategies for oblique detonation wave formation on a finite length wedge in a premixed methane-air mixture. The effectiveness of hydrogen blends (0 - 100%) to methaneair ... -
Unsteady DSMC Simulation of blunt nose with spike at hypersonic rarefield flows
(2023-03-29)To design an efficient ram-air intake for an air-breathing propulsion system for VLEO (Very-Low) / SLEO (Super Low) Earth Orbit satellites requires consideration of the unsteady effects in the hypersonic low-density or ... -
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 ... -
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 ... -
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 ... -
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 ... -
QUBIC : exploring the primordial universe with the q&u bolometric interferometer
(MDPI, 2019-01-23)In this paper, we describe QUBIC, an experiment that will observe the polarized microwave sky with a novel approach, which combines the sensitivity of state-of-the-art bolometric detectors with the systematic effects control ... -
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 ... -
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 ... -
Numerical study of an aerospike nozzle in retropropulsion
(Council of European Aerospace Societies, 2021)The primary motivation of this numerical study is to explore the feasibility of drag enhancement using aerospike nozzle for retropropulsion in hypersonic flow. An external expansion contoured aerospike nozzle with design ... -
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 ... -
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 ... -
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, ... -
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 ... -
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 ...
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