Topic
Diffuser (thermodynamics)
About: Diffuser (thermodynamics) is a research topic. Over the lifetime, 6731 publications have been published within this topic receiving 54738 citations.
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23 Aug 2018
TL;DR: In this article, the authors proposed an alternative model based on the approximation of the results of calculations of diffusers by CFD (Computational Fluid Dynamics)-methods, which showed several advantages and can be used in new versions of mathematical models.
Abstract: Mathematical modeling of gas dynamic characteristics of centrifugal compressor stages is an important part of the modern process of optimal gas-dynamic design. The mathematical model of the vaneless diffuser as of the stage calculates flow parameters at the diffuser exit. In the known Universal Modeling Method the vaneless diffuser model is based on the equations of the process and continuity, on momentum theorem. The objects of calculation are elementary parts of the diffuser. The pressure loss formulae use a number of empirical coefficients. The proposed alternative model is based on the approximation of the results of calculations of diffusers by CFD (Computational Fluid Dynamics)-methods. The model showed several advantages and can be used in new versions of mathematical models.
17 citations
Patent•
17 Jun 1998
TL;DR: An intraocular surgical tool for infusing fluid into an eye of a patient is provided with a housing having a longitudinal bore opening into an aperture, where a flow diffuser is positioned over the aperture to diffuse and slow the flow of fluid through the aperture as discussed by the authors.
Abstract: An intraocular surgical tool for infusing fluid into an eye of a patient. The tool is provided with a housing having a longitudinal bore opening into an aperture. A flow diffuser is positioned over the aperture to diffuse and slow the flow of fluid through the aperture. The flow diffuser may be a cone positioned over the aperture or a permeable cap fitted over the aperture. By diffusing and slowing the flow of fluid, the risk of damage to the interior of the eye is decreased and more fluid is maintained near the tip of the bore after being expelled from the aperture.
17 citations
TL;DR: In this paper, the airflow pattern and particle dispersion in a contaminated full-scale cleanroom are investigated numerically using both Eulerian and Lagrangian approaches, and the results reveal that the supply/exhaust openings arrangement has a significant influence on the particulate contaminant dispersion.
17 citations
Patent•
11 Nov 2010TL;DR: An exhaust diffuser system and method for a turbine engine is described in this article. But it does not specify the inner boundary of the diffuser, and the outer boundary is not considered in this paper.
Abstract: An exhaust diffuser system and method for a turbine engine. The outer boundary may include a region in which the outer boundary extends radially inwardly toward the hub structure and may direct at least a portion of an exhaust flow in the diffuser toward the hub structure. At least one gas jet is provided including a jet exit located on the outer boundary. The jet exit may discharge a flow of gas downstream substantially parallel to an inner surface of the outer boundary to direct a portion of the exhaust flow in the diffuser toward the outer boundary to effect a radially outward flow of at least a portion of the exhaust gas flow toward the outer boundary to balance an aerodynamic load between the outer and inner boundaries.
17 citations
TL;DR: In this article, an extension of Vaz & Wood's optimization in order to take into account the influence of the diffuser speed-up ratio regarding cavitation effect is presented.
17 citations