All Outputs (16)

Mixing Enhancement Study in Axisymmetric Trapped-Vortex Combustor for Propane, Ammonia and Hydrogen (2024)
Journal Article
Uluk, H. S., Dakka, S. M., & Singh, K. (2024). Mixing Enhancement Study in Axisymmetric Trapped-Vortex Combustor for Propane, Ammonia and Hydrogen. Modelling, 5(2), 600-624. https://doi.org/10.3390/modelling5020032

The trapped-vortex combustor (TVC) is an alternative combustor design to conventional aeroengine combustors. The separate fuel and air injection of this combustor and its compact design make it a perfect candidate for conventional fuel usage. Moreove... Read More about Mixing Enhancement Study in Axisymmetric Trapped-Vortex Combustor for Propane, Ammonia and Hydrogen.

Towards isolated roughness induced boundary layer transition at supersonic speeds (2024)
Journal Article
González, L. E. M., & Dakka, S. M. (2024). Towards isolated roughness induced boundary layer transition at supersonic speeds. International Journal of Scientific and Technical Research in Engineering, 9(2), 1-16

The height of surface roughness elements affects the onset of laminar to turbulent transition in a boundary layer. CFD studies have been accomplished using RANS models at very low speeds, as a first step towards the understanding of this technology i... Read More about Towards isolated roughness induced boundary layer transition at supersonic speeds.

Non-reacting Numerical Simulation of Axisymmetric Trapped Vortex Combustor (2023)
Presentation / Conference Contribution
DAKKA, S., Singh, K., Jefferson-Loveday, R., & Serhat, H. (2023). Non-reacting Numerical Simulation of Axisymmetric Trapped Vortex Combustor.

This paper will focus on suitability of trapped vortex combustor as a candidate for gas turbine combustor objective to minimize pressure drop across combustor and investigating aerodynamic performance. Non-reacting simulation of axisymmetric cavity t... Read More about Non-reacting Numerical Simulation of Axisymmetric Trapped Vortex Combustor.

Numerical Analysis of Aerospike Engine Nozzle Performance at Various Truncation Lengths (2021)
Journal Article
Dakka, S., & Dennison, O. (2021). Numerical Analysis of Aerospike Engine Nozzle Performance at Various Truncation Lengths. International Journal of Aviation, Aeronautics, and Aerospace, 8(2), Article 12. https://doi.org/10.15394/ijaaa.2021.1601

The aerospike engine was first devised in the early 1960s where it provided new means of reaching orbit in a single stage. The paper aimes to demonstrate the viability of the technology by showcasing the increased nozzle thrust efficiency over the co... Read More about Numerical Analysis of Aerospike Engine Nozzle Performance at Various Truncation Lengths.

Analysis of the tribological interaction of a polytetrafluoroethylene-lined radial lip oil seal, shaft and lubricant sample (2021)
Journal Article
Shabbir, S., Garvey, S. D., Dakka, S. M., Rothwell, B. C., Su, R., Leach, R., & Weston, N. (2022). Analysis of the tribological interaction of a polytetrafluoroethylene-lined radial lip oil seal, shaft and lubricant sample. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 236(1), 123-143. https://doi.org/10.1177/13506501211005876

To investigate the tribological interaction and wear mechanisms of polytetrafluoroethylene-lined radial lip oil seals in service, a sleeve, seal and lubricant sample taken off a rotating rig are studied. The test was terminated at 72 h, after severe... Read More about Analysis of the tribological interaction of a polytetrafluoroethylene-lined radial lip oil seal, shaft and lubricant sample.

Seal Failure In Aerospace Applications -- Creating A Global Open-source Database (2021)
Journal Article
Shabbir, S., Garvey, S., Rothwell, B., & Dakka, S. (2021). Seal Failure In Aerospace Applications -- Creating A Global Open-source Database. Sealing Technology, 2021(2), 7-9. https://doi.org/10.1016/S1350-4789%2821%2900076-3

Seal failure in aerospace applications-creating a global open-source database Seals are essential components used in numerous applications across engineering. A seal is a component that impedes the flow of fluid through a given system. The word 'impe... Read More about Seal Failure In Aerospace Applications -- Creating A Global Open-source Database.

Performance Characteristics Design of Pulsed Plasma Thrusters for Drag Counter-Reacting (2020)
Journal Article
Dakka, S. (2020). Performance Characteristics Design of Pulsed Plasma Thrusters for Drag Counter-Reacting. International Journal of Aviation, Aeronautics, and Aerospace, 7(4), Article 1. https://doi.org/10.15394/ijaaa.2020.1530

Determining the performance characteristics of off the shelf pulsed plasma thrusters to enhance the life time of low earth orbiting platforms was investigated theoretically. Pulsed plasma thruster analysis was accomplished through development of corr... Read More about Performance Characteristics Design of Pulsed Plasma Thrusters for Drag Counter-Reacting.

Investigation the Stability of Water in Oil Biofuel Emulsions Using Sunflower Oil (2020)
Journal Article
Sahota, R., & Dakka, S. M. (2020). Investigation the Stability of Water in Oil Biofuel Emulsions Using Sunflower Oil. ChemEngineering, 4(2), Article 36. https://doi.org/10.3390/chemengineering4020036

Targets to reduce CO2 emissions by 75% and NOx emissions by 90% by 2050 in aviation have been set by The Advisory Council for Aviation Research and Innovation in Europe. Sustainable fuels, e.g., emulsified biofuel, have demonstrated promise in reduci... Read More about Investigation the Stability of Water in Oil Biofuel Emulsions Using Sunflower Oil.

Aerodynamic Design and Exploration of a Blended Wing Body Aircraft at Subsonic Speed (2019)
Journal Article
Dakka, S., & Johnson, O. (2019). Aerodynamic Design and Exploration of a Blended Wing Body Aircraft at Subsonic Speed. International Journal of Aviation, Aeronautics, and Aerospace, 6(5), Article 17

Blended Wing Body (BWB) is a novel aircraft concept which provides many different aerodynamic benefits over conventional aircrafts design. This research investigated the BWB design, L/D characteristics, surface pressure distribution and span-wise lif... Read More about Aerodynamic Design and Exploration of a Blended Wing Body Aircraft at Subsonic Speed.

Feasibility of Utilizing Current Propulsion Technologies in Support of Very Low Earth Observation Space Platforms (2019)
Presentation / Conference Contribution
Dakka, S. (2019). Feasibility of Utilizing Current Propulsion Technologies in Support of Very Low Earth Observation Space Platforms.

An emerging low earth orbit spacecraft platform is being sought after due to many advantages of operation at low earth orbits of altitude less than 450Km. These encompasses better imagery and enhanced communications capabilities in addition of space... Read More about Feasibility of Utilizing Current Propulsion Technologies in Support of Very Low Earth Observation Space Platforms.

Numerical analysis of flame characteristics and stability for conical nozzle burner (2019)
Journal Article
Al-Mawali, J., & Dakka, S. M. (2019). Numerical analysis of flame characteristics and stability for conical nozzle burner. Journal of Thermal Engineering, 5(5), 422-445. https://doi.org/10.18186/thermal.624070

The stability and the mean structure of methane partially premixed conical burner flames was investigated numerically using ANSYS Fluent. The study presents and discusses the stability curves of the partially premixed flame and maps the mean flame st... Read More about Numerical analysis of flame characteristics and stability for conical nozzle burner.

Design of power, propulsion, and thermal sub-systems for a 3U CubeSat measuring Earth’s radiation imbalance (2018)
Journal Article
Claricoats, J., & Dakka, S. M. (2018). Design of power, propulsion, and thermal sub-systems for a 3U CubeSat measuring Earth’s radiation imbalance. Aerospace, 5(2), Article 63. https://doi.org/10.3390/aerospace5020063

The paper presents the development of the power, propulsion, and thermal systems for a 3U CubeSat orbiting Earth at a radius of 600 km measuring the radiation imbalance using the RAVAN (Radiometer Assessment using Vertically Aligned NanoTubes) payloa... Read More about Design of power, propulsion, and thermal sub-systems for a 3U CubeSat measuring Earth’s radiation imbalance.

Computational fluid dynamics investigation into flow behavior and acoustic mechanisms at the trailing edge of an airfoil (2018)
Journal Article
Jackson, B. R., & Dakka, S. M. (2018). Computational fluid dynamics investigation into flow behavior and acoustic mechanisms at the trailing edge of an airfoil. Noise and Vibration Worldwide, 49(1), 20-31. https://doi.org/10.1177/0957456517751455

© The Author(s) 2018. Airfoil self-noise or trailing edge noise and shear noise were investigated computationally for a NACA 0012 airfoil section, focusing on noise mechanisms at the trailing edge to identify and understand sources of noise productio... Read More about Computational fluid dynamics investigation into flow behavior and acoustic mechanisms at the trailing edge of an airfoil.

Design, development and testing of shape shifting wing model (2017)
Journal Article
Ninian, D., & Dakka, S. M. (2017). Design, development and testing of shape shifting wing model. Aerospace, 4(4), Article 52. https://doi.org/10.3390/aerospace4040052

The design and development of morphing (shape shifting) aircraft wings—an innovative technology that has the potential to increase the aerodynamic efficiency and reduce noise signatures of aircrafts—was carried out. This research was focused on reduc... Read More about Design, development and testing of shape shifting wing model.

Theoretical Prediction of Critical Pyrolysate Mass Fluxes of a Material to Mitigate Spacecraft or Planetary Habitat Fire (2017)
Journal Article
Dakka, S. (2017). Theoretical Prediction of Critical Pyrolysate Mass Fluxes of a Material to Mitigate Spacecraft or Planetary Habitat Fire. Journal of the British Interplanetary Society, 70, Article 12-18

Future deep space exploration and plans for planetary settlements prompted researchers to address variety of challenging engineering problems. One problem is developing materials that can mitigate an event of interplanetary spacecraft fire. A numeric... Read More about Theoretical Prediction of Critical Pyrolysate Mass Fluxes of a Material to Mitigate Spacecraft or Planetary Habitat Fire.

An investigation into flow behavior and acoustic mechanisms at the trailing edge of an airfoil (2016)
Journal Article
Dakka, S. M., Jackson, B. R., Jackson, B. R., & Dakka, S. M. (2016). An investigation into flow behavior and acoustic mechanisms at the trailing edge of an airfoil. Noise and Vibration Worldwide, 47(7-8), 99-111. https://doi.org/10.1177/0957456516683004

© 2016, © The Author(s) 2016. The aerodynamic and acoustic testing of a NACA0012 airfoil section was performed in an open wind tunnel, focusing on noise mechanisms at the trailing edge to identify and understand sources of noise production. The sound... Read More about An investigation into flow behavior and acoustic mechanisms at the trailing edge of an airfoil.