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This paper presents a numerical model of High Pressure Sodium (HPS) lamps including the acoustic streaming. The model is implemented in COMSOL and based on the finite elements method using a D2 axi-symmetric geometry. Moreover, a revision concerning AR experimental characterizations of HPS lamps will also be provided. The obtained results will be provided and discussed. The studies in this paper will...
Summary form only given:In this study we describe the design of a strategy based on a number of selection rules that led us to the identification of materials that could potentially replace mercury and play the role of the active medium in low-pressure discharge lamps. The selection rules focus on the emission and thermodynamic characteristics of species as well as safely considerations and the strategy...
A two-dimensional fluid model has been used to investigate the thermal and dynamic behavior of a high pressure mercury lamp during the high pressure phase. Among the various important mechanisms present in the arc, natural convection effect plays a pivotal role in determining the qualitative as well as quantitative distribution of the temperature field. By being able to contrast the solutions with...
In this work, radiation transport in high intensity discharge lamps is calculated by using 3D ray tracing techniques. The volume of the discharge is meshed into small cuboids elements. From each cell, a number of probe rays are chosen to sample the radiation for different directions, and then discretized radiation transport equation is solved along each ray. Local thermodynamic equilibrium for a cylindrical...
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