Small-Scale Supersonic Combustion Chamber with a Gas-Dynamic Ignition System

Marchan, Roman A.

doi:10.1080/00102202.2011.589874

Cited by 6 publications

(11 citation statements)

References 14 publications

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“…Using air, temperatures of 800. . .1600 K were achieved [40,45,66,67]; for helium, 1000 K [63,68]; for nitrogen, 870 K [69]; for hydrogen, 811 K [70,71], etc. The maximum temperature is usually reached near the dead-end wall of the resonator and is approximately at the same level for another 10% of the length from the bottom of the resonator.…”

Section: Results Of the Analysis Of Sourcesmentioning

confidence: 99%

“…Due to the possibility of reaching high temperatures (up to 1600 K [40]) and the rate of temperature growth (up to 160 K/ms [41]), the resonance effect is widespread in warhead detonation systems [42] and rocket engine fuel ignition systems [43][44][45]. In addition, it is used to generate electricity based on the utilization of temperature differences created by thermoelectric elements [46]; thermal desorption [47]; and magnetohydrodynamic energy conversion [48].…”

Section: Existing Developmentsmentioning

confidence: 99%

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Hartmann–Sprenger Energy Separation Effect for the Quasi-Isothermal Pressure Reduction of Natural Gas: Feasibility Analysis and Numerical Simulation

Belousov,

Lushpeev,

Sokolov

et al. 2024

Energies

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The present paper provides a brief overview of the existing methods for energy separation and an analysis of the possibility of the practical application of the Hartmann–Sprenger effect to provide quasi-isothermal pressure reduction of natural gas at the facilities within a gas transmission system. The recommendations of external authors are analyzed. A variant of a quasi-isothermal pressure regulator is proposed, which assumes the mixing of flows after energy separation. Using a numerical simulation of gas dynamics, it is demonstrated that the position of the resonators can be determined on the basis of calculations of the structure of the underexpanded jet without taking into account the resonator and, accordingly, without the need for time-consuming calculations of the dynamics of the processes. Based on the results of simulating the gas dynamics of two nozzle–resonator pairs installed in a single flow housing, it is shown that, in order to optimize the regulator length, the width of the passage between the two nearest resonators should be greater than or equal to the sum of diameters of the critical sections of the nozzles. Numerical vibroacoustic analysis demonstrated that the most dangerous part of the resonator is the frequency of its natural oscillations.

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Section: Results Of the Analysis Of Sourcesmentioning

confidence: 99%

Section: Existing Developmentsmentioning

confidence: 99%

Hartmann–Sprenger Energy Separation Effect for the Quasi-Isothermal Pressure Reduction of Natural Gas: Feasibility Analysis and Numerical Simulation

Belousov,

Lushpeev,

Sokolov

et al. 2024

Energies

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show abstract

“…This generated hot gas has the potential ability to ignite a combusting mixture. Starting combustion process as an "acoustic igniter" without using any moving part or electrical spark in space propulsion engines is one of the notable thermal applications of the device [4][5][6][7][8][9]. The Hartmann whistle also has other applications in active flow control devices [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…As mentioned before, one of the major applications of the Hartmann-Sprenger device is to use the generated heat in thermal devices such as acoustic igniters. Some notable methods which have been implemented by previous researchers for this kind of application include: extracting small amounts of hot gas from the tube closedend wall, using gap ignition, and placing the tube's hot surfaces in a premixed combustible flow [4]. In all of these methods, optimization of thermal performances of the device is of great importance to reach the highest 1 Total variation diminishing.…”

Section: Introductionmentioning

confidence: 99%

Effect of pipe geometry and material properties on flow characteristics and thermal performance of a conical Hartmann–Sprenger tube

Khoshkbijari

Karimi

2017

J Braz. Soc. Mech. Sci. Eng.

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“…References [22] and [23] developed new resonance ignition systems based on the HRT and used it for multiple ignitions without additional mechanical complexities. Ma [24] successfully implemented stable and high efficiency oil combustion in an industrial furnace with an ultrasonic atomizer based on a HRT.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Acoustic Field Induced by HRT on Oscillation Behavior of a Single Droplet

et al. 2017

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This paper presents an experimental and theoretical study on the effects of an acoustic field induced by Hartmann Resonance Tube (HRT) on droplet deformation behavior. The characteristics of the acoustic field generated by HRT are investigated. Results show that the acoustic frequency decreases with the increase of the resonator length, the sound pressure level (SPL) increases with the increase of nozzle pressure ratio (NPR), and it is also noted that increasing resonator length can cause SPL to decrease, which has rarely been reported in published literature. Further theoretical analysis reveals that the resonance frequency of a droplet has several modes, and when the acoustic frequency equals the droplet's frequency, heightened droplet responses are observed with the maximum amplitude of the shape oscillation. The experimental results for different resonator cavity lengths, nozzle pressure ratios and droplet diameters confirm the non-linear nature of this problem, and this conclusion is in good agreement with theoretical analysis. Measurements by high speed camera have shown that the introduction of an acoustic field can greatly enhance droplet oscillation, which means with the use of an ultrasonic atomizer based on HRT, the quality of atomization and combustion can be highly improved.

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Small-Scale Supersonic Combustion Chamber with a Gas-Dynamic Ignition System

Cited by 6 publications

References 14 publications

Hartmann–Sprenger Energy Separation Effect for the Quasi-Isothermal Pressure Reduction of Natural Gas: Feasibility Analysis and Numerical Simulation

Hartmann–Sprenger Energy Separation Effect for the Quasi-Isothermal Pressure Reduction of Natural Gas: Feasibility Analysis and Numerical Simulation

Effect of pipe geometry and material properties on flow characteristics and thermal performance of a conical Hartmann–Sprenger tube

The Influence of Acoustic Field Induced by HRT on Oscillation Behavior of a Single Droplet

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