A Review Towards the Design Optimization of High Performance Additively Manufactured Rotating Detonation Rocket Engine Injectors

Teasley, Thomas W.; Protz, Christopher S.; Larkey, Andrew; Williams, Benjamin B.; Gradl, Paul R.

doi:10.2514/6.2021-3655

Cited by 12 publications

(1 citation statement)

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“…Here we introduce an AM-enabled, backflow-resistant flow-path geometry termed a "fluidic diode" [4]. Analogous to an electrical diode, which allows electric current to flow in a single forward direction while impeding flow in the opposite direction, this fluidic diode feature serves as a means of resisting the backflow of combustion gases up into the propellant manifold.…”

Section: B Design Of a Fluidic Diodementioning

confidence: 99%

High-diodicity impinging injector design for rocket propulsion enabled by additive manufacturing

Keller

Otomize

Nair

et al. 2022

AIAA SCITECH 2022 Forum

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This work examines novel impinging injector designs enabled by additive manufacturing that reduce forward pressure loss while maintaining high relative back-flow resistance (diodicity). A steady, non-reacting computational fluid dynamics (CFD) model is used to assess the hydraulic characteristics of fluidic diode features in a liquid bi-propellant impinging doublet-type injector configuration relevant to rocket propulsion applications. A design trade study is conducted to determine an effective fluidic diode feature to be implemented within the injector elements, constrained by practical considerations for additive manufacturing. Noteworthy increases in diodicity are achieved within the constraints of producibility relative to conventional designs. A complimentary transient, multiphase CFD model is used to evaluate propellant backflow behavior when subject to a high-pressure impulse within a downstream chamber. Preliminary results suggest that the diodicity is a relevant predictor of transient performance as injector stiffness decreases.

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Section: B Design Of a Fluidic Diodementioning

confidence: 99%