Dynamic thermal and radiative behaviors of a high pressure sodium lamp plasma

Ahmed, Rafiuddin; Kazziz, S.; Troudi, L.; Charrada, K.; Helali, H.; Zissis, Georges; Saïd, Rachid

doi:10.1063/1.2001790

Cited by 12 publications

(5 citation statements)

References 14 publications

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“…The value corresponding to a monoatomic ideal gas is used for the specific heat C p mentioned by Chase et al 23 The transport coefficients calculated in the frame of the first-order approximation give a sufficient accuracy for a large number of plasma references 9,24 where the basic data needed are available, while more sophisticated calculations like those of Devoto 25 will require unaffordable efforts due to missing fundamental data.…”

Section: ͑6͒mentioning

confidence: 99%

A two-dimensional modeling of the warm-up phase of a high-pressure mercury discharge lamp

et al. 2010

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The main objective of this work is to provide a better understanding of the warm-up phase of high-intensity discharge lamps. As an example of application, we chose the high-pressure mercury lamp. Based on two-dimensional fluid model parameters, such as the electric current, the length and the diameter of the burner are modified and the effect of the convective transport is studied. This allows us to obtain a thorough understanding of the physics of these lamps in their transitory phase. The simulation of the warm-up phase is a must for the proper predictions of the lamp behavior and can be conducted by solving the energy balance, momentum, and Laplace's equations for the plasma, using the frame of the local thermodynamic equilibrium coupled with the energy balance of the wall.

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Section: ͑6͒mentioning

confidence: 99%

A two-dimensional modeling of the warm-up phase of a high-pressure mercury discharge lamp

et al. 2010

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“…The transport coefficients calculated in the frame of the first-order approximation gives sufficient accuracy for a large number of plasma references [2], [11] where the basic data needed are available, whereas more sophisticated calculations such as those of Devoto [20] will require unaffordable efforts due to missing fundamental data. An alternative to calculate the radiation energy transport term is to replace it by a simple function U rad = U emit − U abs representing the difference between the emitted and absorbed radiation in the lamp [21]- [23].…”

Section: Energy Conservation Equationmentioning

confidence: 99%

“…The choice of this discharge as a medium for the application of the model is due to, on one hand, the validation possibilities that offer, according to numerous experimental and theoretical studies, both, for which it serves as a support [1], [2]. On the other hand, even if the lamp begins to be replaced by other systems, it continues to be extensively studied because it is a reference system.…”

Section: Introductionmentioning

confidence: 99%

Contrast the Effect of the Mass of Mercury Between the Vertical and Horizontal Mercury Discharge Lamps

Hamida

Charrada

2012

IEEE Trans. Plasma Sci.

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This paper discusses the thermal behavior of a highintensity mercury lamp in a horizontal position, compared with that of a vertical lamp when the pressure of the lamp varies. The model adopted is 3-D, steady, and direct-current powered. After the model validation, we keep the supply current equal to 3.2 A, and we vary the pressure of the lamp to 10 5 -10 6 Pa. Then, we analyzed the temperature fields, the heat conduction flow, the convective flow, and the accumulation of mercury behind the electrodes for the case of the lamp in a horizontal position by comparing it with those of a lamp in a vertical position.

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“…1,2 We can find, in the literature, several modeling works for high-pressure discharge lamps and particularly the high-pressure mercury lamp. [3][4][5][6][7] Charrada et al [8][9][10] have studied the phenomenon of convection in a vertical high-pressure mercury lamp, supplied with a direct current.…”

Section: Introductionmentioning

confidence: 99%

Contrast between the vertical and horizontal mercury discharge lamps

et al. 2011

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This paper discusses the thermal behavior of a high pressure mercury lamp in a horizontal position, compared with that of a vertical lamp. The model adopted is three-dimensional, steady, and powered DC. After the model validation, we analyzed temperature fields and velocities for the case of the lamp in a horizontal position by comparing it with those of a lamp in vertical position. This setting initially fixed the wall temperature equal to 1000 K. However, the morphology of the temperature profile in the case of the horizontal lamp indicates that the temperature of the wall cannot be uniform. Thus, we have, in a second time, performed an energy balance at the wall to calculate its temperature. This aims to understand the influence of convection on the thermal properties of the source.

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Dynamic thermal and radiative behaviors of a high pressure sodium lamp plasma

Cited by 12 publications

References 14 publications

A two-dimensional modeling of the warm-up phase of a high-pressure mercury discharge lamp

A two-dimensional modeling of the warm-up phase of a high-pressure mercury discharge lamp

Contrast the Effect of the Mass of Mercury Between the Vertical and Horizontal Mercury Discharge Lamps

Contrast between the vertical and horizontal mercury discharge lamps

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