Unsteady Heat Transfer Analysis to Predict Combustor Wall Temperature in Rotating Detonation Engine

Roy, Arnab; Strakey, Peter; Sidwell, Todd; Ferguson, Donald H.

doi:10.2514/6.2015-4191

Cited by 13 publications

(8 citation statements)

References 14 publications

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“…The comparison shown in Fig. 4 and as presented in Roy et al 8 with the 2-D model exhibit similar trends, however implementing the periodic gas temperature transients experienced by the outer body wall is a more logical approximation compared to a periodic heat flux boundary condition. Again it should be reiterated that the wall heat transfer coefficient used in convective boundary condition is expected to vary significantly within the entire combustor domain and be strongly influenced by wall temperature rise over time; however, it is kept constant for simplicity in the present study.…”

Section: Figure 2: Unwrapped Rde 2d Gas Temperature Profilesupporting

confidence: 69%

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Development of a Three-dimensional Transient Wall Heat Transfer Model of a Rotating Detonation Combustor

Roy

Strakey

Sidwell

et al. 2016

54th AIAA Aerospace Sciences Meeting

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Numerical simulation of transient heat transfer characteristics of a Rotating Detonation Combustor (RDC) is presented in this paper. A three-dimensional transient conduction model was developed to study the effect of large variation, periodic gas temperature exposed to the inner walls of the rotating detonation combustor outer body. The objective of the simulation is to predict heat flux transients and the interior wall surface temperatures from start up to 10s operation. The time varying, three-dimensional periodic convective boundary condition used for the heat transfer simulation is representative of the detonation wave propagation and other physical characteristics of RDC operating around 3000Hz and is derived from a separate computational fluid dynamics (CFD) simulation. The complex flow distribution downstream of the detonation/fill region results in a wall temperature and fluid dynamics that varies temporally and spatially in all directions. Simulation results were compared with experimental temperature data from literature on the outer body of an uncooled RDC. Combustor wall temperature variation in the axial direction indicates effect of non-uniformity on gas temperature distribution in the combustor for a non-premixed geometry. The simulation provides an estimate of transient heat load and hot spot locations that are critical to design efficient combustor cooling strategies.

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Section: Figure 2: Unwrapped Rde 2d Gas Temperature Profilesupporting

confidence: 69%

“…The first step is to carry out 3-D unsteady RANS simulation of the RDC flowfield using ANSYS-Fluent © up to stable detonation operation of 2-3 cycles. Details of the CFD mesh and simulation are provided in Roy et al 8 and therefore are not repeated here.…”

Section: Introductionmentioning

confidence: 99%

Development of a Three-dimensional Transient Wall Heat Transfer Model of a Rotating Detonation Combustor

Roy

Strakey

Sidwell

et al. 2016

54th AIAA Aerospace Sciences Meeting

Self Cite

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“…In addition to IDDES studies, viscous and diffusive effects may be accounted for in unsteady RANS modelling [107] and facilitate the inclusion of detailed chemistry (see Section 5.4) with significantly lower computational overhead than IDDES or DNS. Such RANS models cannot, however, capture the turbulent fluctuations in the instantaneous flow-field, although there is evidence that they may be able to provide sufficient accuracy for parametric studies of mixing, detonation wave structure and loss mechanisms in RDEs [119,120]. The interactions between detonations, deflagration and viscous and thermal wall-effects add further complexity to producing RDE models which can accurately reproduce experimentally measured engine characteristics, although the computational resources may currently prohibit broad parametric studies using high fidelity modelling approaches.…”

Section: Turbulence Modelling In Rde Simulationsmentioning

confidence: 99%

A Theoretical Review of Rotating Detonation Engines

Shaw¹,

Kildare²,

Evans³

et al. 2021

Direct Numerical Simulations - An Introduction and Applications

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Rotating detonation engines are a novel device for generating thrust from combustion, in a highly efficient, yet mechanically simple form. This chapter presents a detailed literature review of rotating detonation engines. Particular focus is placed on the theoretical aspects and the fundamental operating principles of these engines. The review covers both experimental and computational studies, in order to identify gaps in current understanding. This will allow the identification of future work that is required to further develop rotating detonation engines.

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“…lant to overcome competing dissipative effects, such as the rapid expansion of the flow downstream (a flameout) [8][9][10] and heat transfer out of the combustion chamber [11][12][13].…”

Section: A Experiments Geometry and Dynamicsmentioning

confidence: 99%

Modeling Thermodynamic Trends of Rotating Detonation Engines

Koch,

Kutz

2020

Preprint

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The formation of a number of co-and counter-rotating coherent combustion wave fronts is the hallmark feature of the Rotating Detonation Engine (RDE). The engineering implications of wave topology are not well understood nor quantified, especially with respect to parametric changes in combustor geometry, propellant chemistry, and injection and mixing schemes. In this article, a modeling framework that relates the time and spacial scales of the RDE to engineering performance metrics is developed and presented. The model is built under assumptions of backpressure-insensitivity and nominally choked gaseous propellant injection. The Euler equations of inviscid, compressible fluid flow in one dimension are adapted to model the combustion wave dynamics along the circumference of an annular-type rotating detonation engine. These adaptations provide the necessary mass and energy input and output channels to shape the traveling wave fronts and decaying tails. The associated unit processes of injection, mixing, combustion, and exhaust are all assigned representative time scales necessary for successful wave propagation. We find that the separation, or lack of, these time scales are responsible for the behavior of the system, including wave co-and counterpropagation and bifurcations between these regimes and wave counts. Furthermore, as there is no imposition of wave topology, the model output is used to estimate the net available mechanical work output and thermodynamic efficiency from the closed trajectories through pressure-volume and temperature-entropy spaces. These metrics are investigated with respect to variation in the characteristic scales for the RDE unit physical processes.

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Unsteady Heat Transfer Analysis to Predict Combustor Wall Temperature in Rotating Detonation Engine

Cited by 13 publications

References 14 publications

Development of a Three-dimensional Transient Wall Heat Transfer Model of a Rotating Detonation Combustor

Development of a Three-dimensional Transient Wall Heat Transfer Model of a Rotating Detonation Combustor

A Theoretical Review of Rotating Detonation Engines

Modeling Thermodynamic Trends of Rotating Detonation Engines

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