Numerical analysis of detonation combustion wave in pulse detonation combustor with modified ejector with gaseous and liquid fuel mixture

Debnath, Pinku; Pandey, Krishna Murari

doi:10.1007/s10973-020-09842-1

Cited by 16 publications

(3 citation statements)

References 28 publications

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“…Recently, pulse detonation engines have received interest from researchers. For instance, Debnath et al [52] studied by means of LES simulations the effect of different half angles of the ejector on detonation combustion wave propagation for liquid kerosene and gaseous hydrogen-air mixture. Investigations on the feasibility of pulse detonation combustion with alternative and carbon-free fuels [43,53] and on NO x reduction methods [54,55] have been conducted by several research groups.…”

Section: Pulse Detonation Engine (Pde)mentioning

confidence: 99%

Recent Combustion Strategies in Gas Turbines for Propulsion and Power Generation toward a Zero-Emissions Future: Fuels, Burners, and Combustion Techniques

et al. 2021

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The effects of climate change and global warming are arising a new awareness on the impact of our daily life. Power generation for transportation and mobility as well as in industry is the main responsible for the greenhouse gas emissions. Indeed, currently, 80% of the energy is still produced by combustion of fossil fuels; thus, great efforts need to be spent to make combustion greener and safer than in the past. For this reason, a review of the most recent gas turbines combustion strategy with a focus on fuels, combustion techniques, and burners is presented here. A new generation of fuels for gas turbines are currently under investigation by the academic community, with a specific concern about production and storage. Among them, biofuels represent a trustworthy and valuable solution in the next decades during the transition to zero carbon fuels (e.g., hydrogen and ammonia). Promising combustion techniques explored in the past, and then abandoned due to their technological complexity, are now receiving renewed attention (e.g., MILD, PVC), thanks to their effectiveness in improving the efficiency and reducing emissions of standard gas turbine cycles. Finally, many advances are illustrated in terms of new burners, developed for both aviation and power generation. This overview points out promising solutions for the next generation combustion and opens the way to a fast transition toward zero emissions power generation.

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Section: Pulse Detonation Engine (Pde)mentioning

confidence: 99%

Recent Combustion Strategies in Gas Turbines for Propulsion and Power Generation toward a Zero-Emissions Future: Fuels, Burners, and Combustion Techniques

et al. 2021

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“…The obtained computational results showed that small blockage ratio is suitable for detonation flame acceleration and transition Debnath, P. et al [25]. Debnath P. et al [26,27] studied the ejector effect on detonation combustion wave in pulse detonation combustor. In this study it was observed that ejector can enhances the detonation wave velocity up to 2226 m/s in detonation tube, which is near about C-J velocity.…”

Section: Introductionmentioning

confidence: 98%

Computational fluid dynamics simulation of detonation wave propagation in modified pulse detonation combustor

Debnath,

Pandey

2023

E3S Web Conf.

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In this paper effect of Schelkin spiral material on thermal load and detonation combustion wave propagation in pulse detonation combustor has been simulated. As detonation combustion is supersonic combustion process and energy release rate is very high. In this regards present researches are focusing on flame acceleration process to reduce the DDT run up length. Hence the Schelkin spiral is inserted in detonation tube, which creates a bluff body and enhanced the turbulence of flame propagation. During simulation three turbulence models are used to carry out the reliable and repeatable detonation wave in pulse detonation combustor near thin boundary layer of helical shape Shchelkin spiral. The computational fluid dynamics (CFD) simulation has been performed using Ansys fluent platform. The Large Eddy Simulation (LES), detached eddy simulation with realizable k-ε turbulence model and detached eddy simulation with SST k-ω turbulence model are used for reacting flow simulation. From this simulation the LES turbulence model shows better turbulence initiation of detonation wave with velocity magnitude of 3040 m/s in detonation tube compared to other two turbulence models. This velocity is higher than C-J velocity of 1800 m/s. Further computational result shows that deflagration to detonation transition take place at several waves traveling region, in presence of Shchelkin spiral in detonation tube.

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“…Debnath et al 19 carried out numerical simulation on the pulse detonation engine with ejector and found that the ejector enhanced the detonation wave velocity which reaches up to 2226 m/s in the detonation tube at the same time step, which was near about Chapman-Jouguet (C-J) velocity. Debnath et al 20 researched the influence of the improved ejector at different half angles on detonation combustion wave propagation. The results show that the shrouded ejector with a taper angle of α = +4°performed the strong starting vortex generation and shortest possible time of 0.032 s for fully developed detonation waves.…”

Section: Introductionmentioning

confidence: 99%

Oxygen concentration distribution in a pulse detonation engine with nozzle–ejector combinational structures

Wang

Wei

Qin

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part G:

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Pulse detonation engines (PDEs) with three different types of nozzle–straight ejector combinational structures at three different ejector positions were simulated by the unsteady 2-D axisymmetric method to understand the influence of nozzle–ejector combinational structures on the performance of PDEs. Three types of nozzles included the straight nozzle, convergent nozzle, and convergent–divergent (CD) nozzle. Three ejector positions were considered according to the ratio of the distance between the nozzle outlet and the ejector inlet to the diameter of PDEs (Δx/d). Propane was used as the fuel and air as the oxidizer. The simulation results indicated that for the PDE with the straight nozzle, it took the shortest time for high-temperature burnt gas to exhaust from the detonation tube. For the PDE with the CD nozzle, the time at which the ejector was filled with external air was the fastest. Within the time range of t = 0–10 ms, the ejected air was less than the original air in the ejector among all the nine combinational structures. The maximum ejected air was obtained with the convergent nozzle, followed by the CD nozzle, and the minimum with the straight nozzle. For certain nozzles, the maximum air was ejected at the ejector position of Δx/d = +1, followed by the ejector position of Δx/d = 0, and the minimum at the ejector position of Δx/d = −1. For the convergent nozzle–ejector combinational structure, the air ejection speed was the fastest. Oxygen concentration distribution in the PDE with the CD nozzle was more uniform along the axial direction than the other nozzles.

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Numerical analysis of detonation combustion wave in pulse detonation combustor with modified ejector with gaseous and liquid fuel mixture

Cited by 16 publications

References 28 publications

Recent Combustion Strategies in Gas Turbines for Propulsion and Power Generation toward a Zero-Emissions Future: Fuels, Burners, and Combustion Techniques

Recent Combustion Strategies in Gas Turbines for Propulsion and Power Generation toward a Zero-Emissions Future: Fuels, Burners, and Combustion Techniques

Computational fluid dynamics simulation of detonation wave propagation in modified pulse detonation combustor

Oxygen concentration distribution in a pulse detonation engine with nozzle–ejector combinational structures

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