Finite element estimation of acoustical response functions in HID lamps

Baumann, Bernd; Wolff, Marcus; Hirsch, J. Seth; Antonis, Piet; Bhosle, Sounil; Valdivia-Barrientos, R.

doi:10.1088/0022-3727/42/22/225209

Cited by 11 publications

(10 citation statements)

References 15 publications

(25 reference statements)

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“…On the basis of the temperature profile the acoustic modes are calculated. Using a well-established procedure [15], we then calculate the acoustic pressure inside the arc tube near and at the specific eigenfrequency. In this step viscous loss and heat conduction loss at the inner wall as well as in the interior of the arc tube are taken into account.…”

Section: Model and Coupling Via Recursionmentioning

confidence: 99%

Nonlinear behavior in high-intensity discharge lamps

Baumann

Schwieger

Wolff

et al. 2016

J. Phys. D: Appl. Phys.

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Section: Model and Coupling Via Recursionmentioning

confidence: 99%

Nonlinear behavior in high-intensity discharge lamps

Baumann

Schwieger

Wolff

et al. 2016

J. Phys. D: Appl. Phys.

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“…[1][2][3][4][5][6][7][8][9][10]14,46 The presence of the azimuthal mode and the absence of the longitudinal mode is confirmed in a running HID lamp by using a spatially resolved optical method. [1][2][3][4][5][6][7][8][9][10]14,46 The presence of the azimuthal mode and the absence of the longitudinal mode is confirmed in a running HID lamp by using a spatially resolved optical method.…”

Section: A Azimuthal Waves In a Horizontally Running Lampmentioning

confidence: 99%

Two-dimensional streaming flows in high-intensity discharge lamps

Dreeben

Chini

2011

Physics of Fluids

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High-intensity discharge (HID) lamps embody a practical application in which acoustically generated streaming flows are used to significantly improve energy efficiency. Streaming in these lamps is examined using finite-element simulations in conjunction with available experimental results on the basis of the assumption that the streaming motion is excited by two-dimensional acoustic standing waves. Neither the magnitude nor the direction of the time-averaged flows is adequately explained by existing theory. Consequently, a modified streaming analysis is proposed in which the fluctuating flow is driven by an oscillating pressure field rather by a moving boundary and convective terms in both the instantaneous and streaming flows are included. Density variations are also shown to be important to the generation of the observed and simulated streaming. This analysis highlights the differences between streaming flows in HID lamps and those described in canonical problems appearing elsewhere in the literature.

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“…In frequency space the resonance exhibit a Lorentzian profile [25,26] with side bands which in principle allow a coupling of the resonance to distant excitation frequencies. This means that a lamp should be operated in a region far away from its acoustic resonances.…”

Section: Resultsmentioning

confidence: 99%

Investigation of acoustic resonances in high-power lamps

Kettlitz

Rarbach²,

Zalach

2011

J. Phys. D: Appl. Phys.

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Abstract. High power, medium pressure, mercury containing lamps are used as UV sources for many industrial applications. Lamps investigated in this paper are driven with an electronic ballast with a non-sinusoidal current waveform at a fixed frequency of 20 kHz and a maximum power output of 35 kW. Instabilities can occur if the input power is reduced below 50%. The reason is identified as acoustic resonances in the lamp. Comparison of calculated and measured resonance frequencies shows a good agreement and explains the observed lamp behavior. This led to a development of a new ballast prototype which is able to avoid instabilities by changing the driving frequency in dependence on the applied power.

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Finite element estimation of acoustical response functions in HID lamps

Cited by 11 publications

References 15 publications

Nonlinear behavior in high-intensity discharge lamps

Nonlinear behavior in high-intensity discharge lamps

Two-dimensional streaming flows in high-intensity discharge lamps

Investigation of acoustic resonances in high-power lamps

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