The nonlinear dynamical system generated by the AKT pulse combustor model

Bloom, Frederick; Ahrens, F. W.; Patterson, Tim

doi:10.1016/j.na.2005.01.017

Cited by 14 publications

(6 citation statements)

References 2 publications

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“…Tang et al (1995) showed the oscillations in a pulse combustor to be a consequence of coupling of several acoustic and hydrodynamic factors. Bloom et al (2005Bloom et al ( , 2010Bloom and Patterson, 2009) studied the nonlinear dynamics of a pulse combustor, but focused their study on valved pulse combustors. With the exception of Daw et al (1995), none of the above works applied the tools of nonlinear dynamics systematically to experimental results.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characterization of a Laboratory-Scale Pulse Combustor

Mondal

Mukhopadhyay

Sen

2014

Combustion Science and Technology

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Pulse combustion is a self-sustained and self-oscillating process driven by combustion, coupled with resonant oscillation of the flow in the tailpipe. This article describes the investigation of the effects of different parameters in a laboratory-scale pulse combustor and analyzes them using concepts of nonlinear dynamics. Two orientations of the fuel injection holes were used. In one orientation, the fuel comes in vertically in parallel and counter-flow with the air stream, while in the other orientation the fuel is injected horizontally at cross-flow with the air stream. For the vertical orientation, the frequency slightly decreased with decrease of global equivalence ratio and inlet flow rate. With change of lean to rich air/fuel mixture, the dynamics changes from non-pulsating to pulsating combustion. The transition from noise-dominated to periodic oscillation has also been verified by evaluating the correlation dimension. In the horizontal orientation of the fuel inlet, the pulsating behavior has been obtained even under fuel-lean conditions due to better mixing of air and fuel, and phase and fast Fourier transform plots indicate quasi-periodic behavior.

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Section: Introductionmentioning

confidence: 99%

Dynamic Characterization of a Laboratory-Scale Pulse Combustor

Mondal

Mukhopadhyay

Sen

2014

Combustion Science and Technology

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“…The development of the pulse combustor was largely based on trial and error before the 1980s. Since that time, considerable research has been performed in the field, both experimentally and theoretically , to reveal the driving mechanism of pulse combustion. Several problems were solved, but more questions remain; the stability, dependability, and noise control of the pulse combustor should be ensured before it is widely used.…”

Section: Introductionmentioning

confidence: 99%

Experimental and modeling studies of a multi-tailpipe on a pulse combustor system

Yang

Yin³

2016

Int. J. Energy Res.

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Summary The effect of a multi‐tailpipe structure on a pulse combustor with an exhaust decoupler and a vent pipe is investigated. A nonlinear theoretical model is established, and corresponding experiments are made to verify the theoretical model. The results show that the multi‐tailpipe structure has two effects: It enhances the exhaust gas resistance and decreases exhaust gas velocity in the tailpipe; it also expands the tailpipe heat dissipation area and increases the heat loss. The amplitude of pressure fluctuations in the combustion chamber and exhaust decoupler is determined by competition between the strengthening effect of tailpipe resistance and the weakening effect of heat loss from the tailpipe. Frequency and pressure characteristics are dominated by tailpipe resistance and tailpipe heat loss. The working region is divided into three parts for different structure parameters: low frequency inphase zone, unstable zone, and high‐frequency antiphase zone. Tailpipe resistance only affects the unstable zone, and the necessary value of tailpipe friction exists to minimize the unstable zone. Heat loss from the tailpipe can reduce the unstable zone and cause it to squeeze the inphase zone, resulting in shrinkage of the inphase zone. Copyright © 2016 John Wiley & Sons, Ltd.

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“…Despite its advantages, lack of thorough understanding of the dynamics complicates the design of pulse combustors and is one of the main reasons for lack of adequate interest in the combustion engineering community. Many researchers have investigated the dynamic behaviour of pulse combustors both experimentally [4][5][6][7] and theoretically [4,6,[8][9][10][11][12]. Barring a few [4,9,10], most of these works have concentrated on the qualitative aspects of the combustor dynamics and combustor performance in terms of emission and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Non-linear dynamics in pulse combustor: A review

2015

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The state of the art of non-linear dynamics applied to pulse combustor theoretically and experimentally is reviewed. Pulse combustors are a class of air-breathing engines in which pulsations in combustion are utilized to improve the performance. As no analytical solution can be obtained for most of the nonlinear systems, the whole set of solutions can be investigated with the help of dynamical system theory. Many studies have been carried out on pulse combustors whose dynamics include limit cycle behaviour, Hopf bifurcation and period-doubling bifurcation. The dynamic signature has also been used for early prediction of extinction.

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The nonlinear dynamical system generated by the AKT pulse combustor model

Cited by 14 publications

References 2 publications

Dynamic Characterization of a Laboratory-Scale Pulse Combustor

Dynamic Characterization of a Laboratory-Scale Pulse Combustor

Experimental and modeling studies of a multi-tailpipe on a pulse combustor system

Non-linear dynamics in pulse combustor: A review

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