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Rotating Detonation Combustor Mechanics

Anand, Vijay G
http://orcid.org/0000-0003-0312-2591
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1530798871271548

Abstract Details

2018, PhD, University of Cincinnati, Engineering and Applied Science: Aerospace Engineering.
Recent years have witnessed a notable increase in endeavors resorted to investigating unsteady combustion/pressure processes that offer a prospective increase in stagnation pressure due to a more efficient combustion of fuel. One such pressure gain combustion (PGC) concept is a rotating detonation combustor (RDC). RDCs make use of a rotating detonation wave that travels circumferentially about a hollow or annular chamber at kilohertz frequencies, continually combusting the supplied reactants without the need for more than one initial ignition event. Due to its simplicity in design, which can be integrated into existing systems’ architecture, and the lack of moving mechanical components, RDCs are at the forefront of PGC research. The current dissertation deals with the basic mechanics of these combustors. Specifically, the diverse modes of detonative operation in annular and hollow combustor configurations are experimentally studied, and the variables dictating these modes are extracted. The question of what exactly constitutes a rotating detonation combustor is answered, by “converting” a conventional atmospheric deflagrative hollow combustor into an RDC. Further, based on this demonstration, the numerous kinships between RDC operation and decades of observations pertaining to high frequency combustion instabilities in rocket engines are presented and discussed. It is argued that most of the poorly understood phenomena of high frequency instabilities can be explained by detonation-based physics. Finally, evidence is presented that suggests rotating detonations to be type of near-limit detonation behavior. The findings of this study are proposed to be useful for the three different communities of RDC research, rocket engine instabilities and fundamental detonation physics.
Ephraim Gutmark, Ph.D. (Committee Chair)
Shaaban Abdallah, Ph.D. (Committee Member)
Mark Turner, Sc.D. (Committee Member)
398 p.
Aerospace Materials
Rotating Detonation Engine; Pressure Gain Combustion; Combustion Instability; Detonation Physics

Recommended Citations

Citations

  • Anand, V. G. (2018). Rotating Detonation Combustor Mechanics [Doctoral dissertation, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1530798871271548

    APA Style (7th edition)

  • Anand, Vijay. Rotating Detonation Combustor Mechanics. 2018. University of Cincinnati, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1530798871271548.

    MLA Style (8th edition)

  • Anand, Vijay. "Rotating Detonation Combustor Mechanics." Doctoral dissertation, University of Cincinnati, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1530798871271548

    Chicago Manual of Style (17th edition)

ucin1530798871271548
546
© 2018, some rights reserved.Creative Commons License Rotating Detonation Combustor Mechanics by Vijay G Anand is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.