Effect of Blockage Ratio on Detonation Flame Acceleration in Pulse Detonation Combustor Using CFD

Debnath, Pinku; Pandey, Krishna Murari

doi:10.4028/www.scientific.net/amm.656.64

Cited by 12 publications

(5 citation statements)

References 21 publications

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“…The effect of blockage ratio of 0.4, 0.5, 0.6 and 0.7 in channel for detonation wave acceleration are shown in Figure 4. The contour plot analysis shows the shock wave initiation and propagation time period in detonation tube is reduced by smaller blockage ratio of 0.5 [59]. Tripathi et al [60] computationally studied on effect of obstacle on flame propagation velocity.…”

Section: Results From Cfd Simulation and Calorimetric Analysismentioning

confidence: 99%

A State of Art Review on Thermodynamics Performance Analysis in Pulse Detonation Combustor

Debnath¹,

Pandey²

2022

Applications of Calorimetry

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Pulse detonation engines (PDEs) are most exciting for future propulsion generation. Detonation combustion in pulse detonation combustor is an energetic combustion process which is differs from other combustion process. The detonation wave propagation in detonation tube is a pulse setting combustion phenomena. Detonation combustion process is thousands times faster than deflagration combustion process. PDE utilizes several pulse of detonation wave to produce propulsive force. The potential applications of PDEs are drastically reduces the cost of orbit transfer vehicle system and flying mode applications. Of course it can be used as ground level applications also. Draw back are DDT in shortest possible time in the combustor. In this regards, worldwide researchers are focusing on scientific and technical issues related to improvement of PDC. The present chapter deals with review study on detonation combustion process, historical overview on chemical kinetics, calorimetric and entropy transport, energy and exergy analysis and factor effecting on deflagration to detonation transition with recommendable future research.

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Section: Results From Cfd Simulation and Calorimetric Analysismentioning

confidence: 99%

A State of Art Review on Thermodynamics Performance Analysis in Pulse Detonation Combustor

Debnath¹,

Pandey²

2022

Applications of Calorimetry

Self Cite

View full text Add to dashboard Cite

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“…The temperature contour plots of detonation wave in obstructed detonation tube having blockage ratio of BR = 0.4, 0.5, 0.6, and 0.7 at obstacle spacing of = 4 cm are shown in Figure 17. The strong detonation wave propagation temperature of 3185 K was found in obstacle spacing of = 4 cm and detonation wave acceleration temperature greatly depends on blockage ratio; the strong propagation temperature increases the thermodynamic performance, which was found in blockage ratio of BR = 0.4 [132].…”

Section: Effect Of Obstacle Geometry On Detonation Wavementioning

confidence: 94%

Review on Recent Advances in Pulse Detonation Engines

Pandey

Debnath

2016

Journal of Combustion

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Pulse detonation engines (PDEs) are new exciting propulsion technologies for future propulsion applications. The operating cycles of PDE consist of fuel-air mixture, combustion, blowdown, and purging. The combustion process in pulse detonation engine is the most important phenomenon as it produces reliable and repeatable detonation waves. The detonation wave initiation in detonation tube in practical system is a combination of multistage combustion phenomena. Detonation combustion causes rapid burning of fuel-air mixture, which is a thousand times faster than deflagration mode of combustion process. PDE utilizes repetitive detonation wave to produce propulsion thrust. In the present paper, detailed review of various experimental studies and computational analysis addressing the detonation mode of combustion in pulse detonation engines are discussed. The effect of different parameters on the improvement of propulsion performance of pulse detonation engine has been presented in detail in this research paper. It is observed that the design of detonation wave flow path in detonation tube, ejectors at exit section of detonation tube, and operating parameters such as Mach numbers are mainly responsible for improving the propulsion performance of PDE. In the present review work, further scope of research in this area has also been suggested.

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“…The effect of blockage ratio on detonation flame acceleration was studied computationally. 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.…”

Section: Introductionmentioning

confidence: 97%

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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Effect of Blockage Ratio on Detonation Flame Acceleration in Pulse Detonation Combustor Using CFD

Cited by 12 publications

References 21 publications

A State of Art Review on Thermodynamics Performance Analysis in Pulse Detonation Combustor

A State of Art Review on Thermodynamics Performance Analysis in Pulse Detonation Combustor

Review on Recent Advances in Pulse Detonation Engines

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

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