Numerical Simulation of Supersonic Mixing Enhanced by a Three-Dimensional Cavity Flow

Oka, Takayuki; Akagi, Fujio; Handa, Taro; Ando, Youichi; Yamaguchi, Sumio

doi:10.1115/ajkfluids2015-13140

Cited by 2 publications

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“…Even with equivalence ratio of lower success rate for supersonic combustion, initiator tube in position P3 which is near the open end is still able to successfully initiate rotating supersonic wave in the engine. To further improve mixing of reactants, studies such as 24,25) which uses technique of wall mounted cavity could be implemented in the annulus combustion chamber.…”

Section: Discussionmentioning

confidence: 99%

Initiation Characteristics of Rotating Supersonic Combustion Engine

Mazlan¹,

Yasin²,

Saat³

et al. 2021

Evergreen

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A rotating supersonic combustion engine (RSCE) is tested with various initiator tube positions along the combustion chamber to determine its impact on the ignition process. The type of fuel used is methane with oxygen as the oxidizer. The initiation of RSCE is assessed for nearstoichiometric methane-oxygen mixture to slightly rich mixture. Successful initiation of rotating supersonic combustion in the RSCE was obtained when the position of the initiator tube is located higher end of the combustion chamber that indicates a proper mixing of reactants. The mixing of reactants improves further up the annulus chamber of the RSCE.

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Section: Discussionmentioning

confidence: 99%

Initiation Characteristics of Rotating Supersonic Combustion Engine

Mazlan¹,

Yasin²,

Saat³

et al. 2021

Evergreen

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show abstract

“…Secondary Flow Generator -Cavity with Pseudo Sub-Cavities [19] A 3-D wall mounted cavity has been proposed (see figure below) which utilises the idea of secondary flows to enhance main flow fuel-air mixing through increased fuel jet penetration. This design is expected to generate the intense pressure waves generally associated with cavity-induced flow oscillations as well as a secondary flow, induced by a pressure gradient along the duct span caused by the generation of bow shock waves appearing in front of the trailing edge step structures of the cavity.…”

Section: Novel Designsmentioning

confidence: 99%

“…Injection ports are located downstream of the cavity device at the onset of duct divergence. Figure 4: Novel Cavity Design [19] From the numerical analysis conducted, bow shock waves were seen to form at the front of the cavity rear face along the non-cut edges due to flow impingement. A spanwise pressure gradient is generated as a result, which in turn produces a secondary flow that moves around the jet.…”

Section: Novel Designsmentioning

confidence: 99%

UQ eSpace

Joshi¹

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The numerous challenges, issues and tasks experienced throughout this project could not have been faced and overcome in any way without the unmeasurable guidance and support, abundant feedback and brilliant advice I was fortunate enough to receive from the following group of individuals. I would therefore like to acknowledge, My supervisor, Dr. Ananthanarayanan Veeraragavan, who has relentlessly made an effort to ensure I was able to complete the project to my level of satisfaction. At every challenge faced by me and my colleague, his input, in any shape, way or form, enabled us to rapidly overcome the associated hindrances and difficulties. Mr. Will Landsberg, the PhD research fellow I was corresponding with. Although he had mentioned many times that this was "just his job", the degree to which he involved and committed himself to ensuring our work could be completed successfully was unparalleled. Along with Anand, the collective amount of knowledge and understanding that I had the privilege to access and receive from both of them has been nothing less than priceless and of immense significance to me as a developing engineer. My highly understanding and intelligent colleague and friend, Lachlan Arundell, for his never-ending entertainment and humor, support, advice, feedback and will to tackle and overcome seemingly never-ending challenges. Witnessing his dedication has driven and enabled me to produce the standard of work presented here. Dr. Rowan Gollan, Dr. Peter Jacobs and Mr. Will Landsberg for their rapid responses to issues/bugs/limitations in the Eilmer4 source code and dedication to updating the code for immediate use in project related tasks. Dr. Vincent Wheatley for swiftly providing us with access to both GridPro and Raijin so that we could conduct our work without delay. This research study/project was undertaken with the assistance of resources and services from The University of Queensland's Tinaroo HPC and The National Computational Infrastructure's (NCI) Raijin HPC, without which the results presented here could not be obtained. I would finally and ultimately like to acknowledge my family for the continuous support and understanding I have received from them throughout.

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Numerical Simulation of Supersonic Mixing Enhanced by a Three-Dimensional Cavity Flow

Cited by 2 publications

References 0 publications

Initiation Characteristics of Rotating Supersonic Combustion Engine

Initiation Characteristics of Rotating Supersonic Combustion Engine

UQ eSpace

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