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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Numerical investigation of symmetry breaking and critical behavior of the acoustic streaming field in high-intensity discharge lamps
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Numerical investigation of symmetry breaking and critical behavior of the acoustic streaming field in high-intensity discharge lamps

机译：高强度放电灯声流场对称破坏和临界行为的数值研究

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摘要

For energy efficiency and material cost reduction it is preferred to drive high-intensity discharge lamps at frequencies of approximately 300 kHz. However, operating lamps at these high frequencies bears the risk of stimulating acoustic resonances inside the arc tube, which can result in low frequency light flicker and even lamp destruction. The acoustic streaming effect has been identified as the link between high frequency resonances and low frequency flicker. A highly coupled three-dimensional multiphysics model has been set up to calculate the acoustic streaming velocity field inside the arc tube of high-intensity discharge lamps. It has been found that the velocity field suffers a phase transition to an asymmetrical state at a critical acoustic streaming force. In certain respects the system behaves similar to a ferromagnet near the Curie point. It is discussed how the model allows to investigate the light flicker phenomenon. Concerning computer resources the procedure is considerably less demanding than a direct approach with a transient model.
机译：为了提高能源效率和降低材料成本，最好以大约300 kHz的频率驱动高强度放电灯。然而，在这些高频下操作灯具有刺激弧光管内部声共振的风险，这可能导致低频光闪烁，甚至损坏灯。流声效应已被确定为高频共振和低频闪烁之间的联系。建立了高度耦合的三维多物理场模型，以计算高强度放电灯弧光管内部的声速流场。已经发现，在临界声流作用力下，速度场经历到非对称状态的相变。在某些方面，系统的行为类似于居里点附近的铁磁体。讨论了该模型如何允许调查光闪烁现象。关于计算机资源，该过程比采用瞬态模型的直接方法的要求低得多。

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