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Behaviour of Roofing Materials Facing to Micro-Organisms

Green and Sustainable Chemistry 2013年第1期3卷 8-14页

作者： Marielle Fassier Céline Faugeron Vincent Gloaguen Céline Ducroquetz olivier dupont Centre Technique de Matériaux Naturels de Construction Paris France Laboratoire de Chimie des Substances Naturelles Limoges France

An accelerated water-streaming test was used to evaluate several roofing materials regarding their behavior to colonization by algae, by closely reproducing the phenomenon of natural biological soiling. A set of roofing materials with defined physical and chemical characteristics was thus investigated against the colonization by algae. Porosity, roughness and chemical composition showed to be factors of influence in the establishment of those micro-organisms.

关键词： Building Materials Fired Clay Products Water-Streaming Test Micro-Organisms Colonization

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便携式微型发射光谱仪在金属工业中的应用(英文)

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冶金分析 2007年第5期27卷 8-13页

作者： TUSSET Victor LEMAIRE olivier ZEIMETZ Eva dupont Alain C.R.M. LiègeBelgium

通过有证参考物质对便携式在线发射光谱仪在不同金属类别的快速成分控制的应用进行了考察。分析了大量的不同样品(低碳和超低碳钢,不锈钢,铝、镍和铜基样品),并通过采用参考的化学分析方法如ICP-OES,XRF,C和S的燃烧等等方法对结果进行... 详细信息

通过有证参考物质对便携式在线发射光谱仪在不同金属类别的快速成分控制的应用进行了考察。分析了大量的不同样品(低碳和超低碳钢,不锈钢,铝、镍和铜基样品),并通过采用参考的化学分析方法如ICP-OES,XRF,C和S的燃烧等等方法对结果进行了评价。对于低碳钢中的C,S和P的分析,通过特别的校正方法,采用新型的便携式光谱仪能获得与传统的固定式光谱仪相当的分析效果。本文也列举了多种非进样直接分析的相关应用实例。

关键词：便携式在线发射光谱仪快速成分控制金属

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Comparisons between numerical calculations and measurements in vaned diffuser of SHF impeller

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排灌机械工程学报 2013年第12期31卷 1013-1020页

作者： Annie-Claude Bayeul-Lainé Patrick dupont Giovanna Cavazzini Patrick Cherdieu Antoine Dazin Gérard Bois olivier Roussette Laboratoire de Mécanique de Lille(UMR CNRS 8107) Arts et Métiers ParisTech Laboratoire de Mécanique de Lille(UMR CNRS 8107) Ecole Centrale de LilleVilleneuve D'Ascq Cedex 59651France Department of Industrial Engineering University of Padova

The paper presents analysis of the performance and the internal flow behaviour in the vaned diffuser of a radial flow pump using PIV(particle image velocimetry)and pressure probe *** measurements have already been performed at middle height inside one diffuser channel passage for a given speed of rotation and various mass flow *** results have been already presented in several previous *** experiments have been performed using a three-hole pressure probe traverses from hub to shroud diffuser width at different radial locations between the two diffuser geometrical *** simulations are also realized with the commercial codes Star CCM+7.02.011 and *** rotor and fully unsteady calculations of the whole pump have been *** between numerical results,previous experimental PIV results and new probe traverses one's are presented and discussed for one mass flow *** this respect,a first attempt to take into account fluid leakages between the rotating and fixed part of the pump has been checked since it may affects the real flow structure inside the diffuser.

关键词： vaned diffuser radial flow pump unsteady flow numerical calculations particle image velocimetry(PIV) three-hole probe

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Blockage and distortion effects on a vane-island type diffuser performance of centrifugal pumps for various flow rates

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排灌机械工程学报 2016年第12期34卷 1013-1021页

作者： SI Qiaorui DAZIN Antoine dupont Patrick ROUSSETTE olivier BOIS Gérard National Research Center of Pumps Jiangsu University Laboratoire de Mécanique de Lille (UMR CNRS 8107) Arts et Métiers ParisTech Laboratoire de Mécanique de Lille(UMR CNRS 8107) Ecole Centrale de Lille

Experimental investigation of mean flow velocity and pressure inside the vane-island type diffuser passage of a test centrifugal pump model is presented.A directional three-hole probe was used to investigate hub-to-shroud flow properties at diffuser leading and trailing edge *** addition,the mid-section between suction and pressure sides along the diffuser passage was also *** these measurements were performed at five different flow *** flow structures at the inlet section of the diffuser and along with the passage were analyzed in detail,with a focus on the flow distribution and the pressure recovery evolution of different diffuser *** and distortion effects were analyzed by using existing published particle image velocimetry(PIV)measurements in the outer part of the impeller and around the diffuser throat in order to get a better understanding of the overall performances and local flow structures of such a diffuser *** results show that back flows occur on the shroud region from impeller exit plane up to the semi-vaneless part of the diffuser at low flow *** blockage effects combining with blade thickness geometrical blockage tend to diminish the effects of theoretical high positive *** high flow rates,negative incidence effects induce high local velocity on the pressure side of the diffuser just after the *** aerodynamic blockage associated with low flow distortions are found to have a beneficial effect on pressure recovery for low flow *** the contrary,high flow distortions are found for increased flow rates,resulting in a low pressure recovery inside the semi-vane less part of the diffuser and after the throat.

关键词： vane island diffuser flow structure pressure recovery three-hole probe particle image velocimetry

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