Rotary wave-ejector enhanced pulse detonation engine

Nalim, M. Razi; Izzy, Zuhair; Akbari, Pezhman

doi:10.1007/s00193-011-0348-5

Cited by 9 publications

(3 citation statements)

References 48 publications

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“…The details of flow field of detonation wave propagation inside the detonation tube and injection into the ejectors were studied. The rotary wave ejector concept has highly significant potential for thrust augmentation relative to a basic pulse detonation engine [91]. Yi et al [92] studied the effect of ejector in pulse detonation rocket propulsion system.…”

Section: Reviews On Computational Analysismentioning

confidence: 99%

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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Section: Reviews On Computational Analysismentioning

confidence: 99%

Review on Recent Advances in Pulse Detonation Engines

Pandey

Debnath

2016

Journal of Combustion

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“…The bulk of early studies focused on pressure exchangers with straight passage profiles for gas turbine topping cycles [1][2][3][4][5][6][7][8] and supercharging devices for internal combustion engines [9][10][11][12][13][14][15][16]. In recent years the application to refrigeration cycles [17][18][19] and pressure-gain combustors [20][21][22] has come into the focus of consideration.…”

Section: Introductionmentioning

confidence: 99%

Validation of a Numerical Quasi-One-Dimensional Model for Wave Rotor Turbines With Curved Channels

Tüchler

Copeland

2020

Journal of Engineering for Gas Turbines and Power

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A wave rotor is a shock-driven pressure exchange device that, while relatively rarely studied or indeed, employed, offers significant potential efficiency gains in a variety of applications including refrigeration and gas turbine topping cycles. This paper introduces a quasi-one-dimensional (Q1D) wave action model implemented in matlab for the computation of the unsteady flow field and performance characteristics of wave rotors of straight or cambered channel profiles. The purpose here is to introduce and validate a rapid but reliable method of modeling the performance of a power-generating wave rotor where little such insight exists in open literature. The model numerically solves the laminar one-dimensional (1D) Navier–Stokes equations using a two-step Richtmyer time variation diminishing (TVD) scheme with minmod flux limiter. Additional source terms account for viscous losses, wall heat transfer, flow leakage between rotor and stator endplates as well as torque generation through momentum change. Model validation was conducted in two steps. First of all, unsteady and steady predictive capabilities were tested on three-port pressure divider rotors from open literature. The results show that both steady port flow conditions as well as the wave action within the rotor can be predicted with good agreement. Further validation was done on an in-house developed and experimentally tested four-port, three-cycle, throughflow microwave rotor turbine featuring symmetrically cambered passage walls aimed at delivering approximately 500 W of shaft power. The numerical results depict trends for pressure ratio, shaft power, and outlet temperature reasonably well. However, the results also highlight the need to accurately measure leakage gaps when the machine is running in thermal equilibrium.

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“…It is furthermore noted that the internal gas dynamics strongly interact with the combustion characteristics leading to potentially higher sensitivity to variations in operating conditions and in particular the fuelling strategy. Additional investigation of the interaction of wave action with combustion dynamics by Nalim et al [30,31] found that both premixed and non-premixed combustion require high levels of turbulence to establish complete combustion.…”

Section: Introductionmentioning

confidence: 99%