Development of a Robust 3-D Model for HID Lamps and Comparison of Predicted and Measured Electrode Temperatures

Paul, K.C.; Takemura, T.; Hiramoto, Tatsumi; Yoshida, Masaki; Igarashi, Tatsushi; Horikawa, Yoshiaki; Tsukamoto, Takeo; Sugitani, Akihiko

doi:10.1109/tps.2007.892137

Cited by 8 publications

(4 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The lower momentum arc region was strongly affected by the buoyancy. This result was the same tendency as other studies [10,27]. The volume-averaged and maximum gas temperatures of the 2D model [12] and 3D model were the almost same.…”

Section: Discussionsupporting

confidence: 88%

“…The radiation absorption on the bulb wall, which increases the bulb wall temperature, is taken into account. The P-1 or DO radiation model using the net radiative coefficient is generally applied to take into account the radiation transport of the short arc lamp [19,27]. The radiation energy transported to the inner bulb wall is partly absorbed by the bulb to increase the bulb temperature.…”

Section: Mathematical Formationmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of the influence of buoyancy on gas convection of a horizontal xenon short arc lamp through 3D numerical simulation

Maenaka¹,

Tashiro²,

Murphy³

et al. 2020

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

When operating a xenon short arc lamp, tungsten vapour that evaporates from the electrodes is transported by gas convection to blacken the inner bulb wall. Since this reduces the output light intensity and increases the risk of lamp breakage, it is crucial to thoroughly understand the factors that govern gas convection to optimally control it to reduce blackening. Gas convection is complex, especially in horizontal lamps, because it is strongly affected by buoyancy. This study used 3D numerical simulation to investigate buoyancy’s influence on the gas convection of a horizontal xenon short arc lamp, which directly affects the blackening location. Gas convection, especially in the low flow velocity region, was strongly affected by the buoyancy, whose strength was mainly determined by the anode surface temperature. The gas convection in turn affected the bulb wall temperature and the W vapour transport and was reflected in the blackening location. This result indicates that the surface temperature of the anode, which was determined by the energy balance between the gas and anode, also affected the blackening location. Therefore, the emissivity of the anode surface was an important factor controlling the horizontal lamp’s gas convection.

show abstract

Section: Discussionsupporting

confidence: 88%

Section: Mathematical Formationmentioning

confidence: 99%

Investigation of the influence of buoyancy on gas convection of a horizontal xenon short arc lamp through 3D numerical simulation

Maenaka¹,

Tashiro²,

Murphy³

et al. 2020

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…where j s is the current density in the cathode sheath region [A/m 2 ], U s is the potential drop in the cathode sheath region [V] and Δy = 0.1 mm is the maximum value of the experimentally observed thickness of the cathode sheath [29,39,40].…”

Section: Cathode Sheath Modelmentioning

confidence: 99%

“…Paul et al [28][29][30][31] improved the sheath model proposed by Benilov and Marotta [32] and determined the radiative efficiency of the HID lamp by calculating the basic lamp characteristics such as the temperature of the region and the velocity of the gas. The improvements included the use of powerful radiative transport models, namely the P-1 model [33] and the DO (Discrete Ordinates) model [14,34] in different studies.…”

Section: Introductionmentioning

confidence: 99%

Modeling of a xenon short arc lamp considering the behavior of tungsten vapour evaporated from electrodes

Maenaka¹,

Tashiro

Murphy

et al. 2019

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

The tungsten vapour produced from the electrodes during short arc lamp operation is transported by gas convection and then deposited on the inner quartz bulb wall to form a tungsten thin film, causing the wall to blacken. We have been able to consider important phenomena for the first time by developing a unified numerical simulation model incorporating relevant sub-models. These include the absorption of the radiant energy due to blackening of the lamp and the temporal variation in the lamp parameters. The validity of the numerical simulation model is first evaluated by comparison with experimental results. The basic characteristics of the lamp obtained using the model is found to be in good agreement with the experimental results and other research results. The influence of the bulb wall blackening is then examined. The temperature of the bulb is shown strongly affected by convective heat transfer from the hot gas, and the temperature rise of the bulb after blackening is found to be primarily governed by the absorption of the radiant energy by the tungsten thin film. Through the increase in the bulb temperature, the gas temperature in the bulb is also increased. This raises the operating pressure, which increases the stress on the bulb wall. Consequently, it is demonstrated that the probability of breakage gradually increases with time due to the blackening by tungsten vapour deposition.

show abstract

Influence of Electrode Energy Balance on Gas Convective Pattern of a High-Pressure Xenon Short Arc Lamp

Maenaka¹,

Tashiro

Murphy

et al. 2020

Plasma Chem Plasma Process

View full text Add to dashboard Cite

Development of a Robust 3-D Model for HID Lamps and Comparison of Predicted and Measured Electrode Temperatures

Cited by 8 publications

References 32 publications

Investigation of the influence of buoyancy on gas convection of a horizontal xenon short arc lamp through 3D numerical simulation

Investigation of the influence of buoyancy on gas convection of a horizontal xenon short arc lamp through 3D numerical simulation

Modeling of a xenon short arc lamp considering the behavior of tungsten vapour evaporated from electrodes

Influence of Electrode Energy Balance on Gas Convective Pattern of a High-Pressure Xenon Short Arc Lamp

Contact Info

Product

Resources

About