Shuang Chen, Jan Kapusta Lukasz, Wubin Weng, Tie Su, Xiaobo Tu, Li Zhongshan
The simultaneous multi-species Planar Laser Induced Fluorescence technique plays an important role in studying the flame structure and the two-dimensional distribution of intermediate species in combustion. The experimental system of OH/CH2O/Acetone-PLIF was built in order to study the CH4-Air inverse diffusion jet (IDJ) flame. The system consists of two sets of lasers, two intensifier-CCD cameras, a temporal controller and several lenses. The strategy of fluorescence excitation, the method of synchronous timing control and image calibration procedures are discussed. The IDJ flame was studied using the simultaneous multi-species PLIF technique, and the reaction zone, pre-heating zone and fuel zone of IDJ flame were determined. Experimental results suggest that the IDJ flame is different from either the normal diffusion flame or the premixed jet flame. The behavior of this type of flame reveals similarity to the partially premixed flame. Compared to OH chemilumiscence images, simultaneous multi-species PLIF can provide more detail and information about the flame structure and it has huge potential in fundamental combustion studies and industrial burner experiments (Less)
{"title":"CH 4 /Air反扩散射流火焰多组分同步PLIF诊断","authors":"Shuang Chen, Jan Kapusta Lukasz, Wubin Weng, Tie Su, Xiaobo Tu, Li Zhongshan","doi":"10.11729/syltlx20170138","DOIUrl":"https://doi.org/10.11729/syltlx20170138","url":null,"abstract":"The simultaneous multi-species Planar Laser Induced Fluorescence technique plays an important role in studying the flame structure and the two-dimensional distribution of intermediate species in combustion. The experimental system of OH/CH2O/Acetone-PLIF was built in order to study the CH4-Air inverse diffusion jet (IDJ) flame. The system consists of two sets of lasers, two intensifier-CCD cameras, a temporal controller and several lenses. The strategy of fluorescence excitation, the method of synchronous timing control and image calibration procedures are discussed. The IDJ flame was studied using the simultaneous multi-species PLIF technique, and the reaction zone, pre-heating zone and fuel zone of IDJ flame were determined. Experimental results suggest that the IDJ flame is different from either the normal diffusion flame or the premixed jet flame. The behavior of this type of flame reveals similarity to the partially premixed flame. Compared to OH chemilumiscence images, simultaneous multi-species PLIF can provide more detail and information about the flame structure and it has huge potential in fundamental combustion studies and industrial burner experiments (Less)","PeriodicalId":35450,"journal":{"name":"Shiyan Liuti Lixue/Journal of Experiments in Fluid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72789094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The flow inside a vane-island diffuser has been studied experimentally using directional probe traverses and time-resolving stereoscopic particle image velocimetry. A classical three holes probe was used covering most of the complete section of the diffuser from hub to shroud and from the pressure to the suction side in order to evaluate the static pressure recovery at five mass flow rates. The difference between theoretical and measurement values of pressure recovery factors shows that the great loss of the static pressure comes from the vaned part when the flow rate is higher than the designed value of the diffuser. Previous 2C-2D PIV measurement results were also given to verify that flow separation area exists on the pressure side under the above two conditions. Six schemes of vortex generators were designed to control the boundary-layer separation. Mean flow characteristics of the scheme obtaining the best pump performance was then analyzed.
{"title":"Experimental investigation on the characteristics and controlling of flow separation inside the centrifugal diffuser","authors":"Q. Si, Y. Shouqi, P. Cherdieu, G. Bois","doi":"10.11729/SYLTLX20150038","DOIUrl":"https://doi.org/10.11729/SYLTLX20150038","url":null,"abstract":"The flow inside a vane-island diffuser has been studied experimentally using directional probe traverses and time-resolving stereoscopic particle image velocimetry. A classical three holes probe was used covering most of the complete section of the diffuser from hub to shroud and from the pressure to the suction side in order to evaluate the static pressure recovery at five mass flow rates. The difference between theoretical and measurement values of pressure recovery factors shows that the great loss of the static pressure comes from the vaned part when the flow rate is higher than the designed value of the diffuser. Previous 2C-2D PIV measurement results were also given to verify that flow separation area exists on the pressure side under the above two conditions. Six schemes of vortex generators were designed to control the boundary-layer separation. Mean flow characteristics of the scheme obtaining the best pump performance was then analyzed.","PeriodicalId":35450,"journal":{"name":"Shiyan Liuti Lixue/Journal of Experiments in Fluid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86366083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Three-dimensional vorticity and heat transport in a circular cylinder wake using phase-averaging method","authors":"H. Cao, J. Chen, T. Zhou, Y. Zhou","doi":"10.11729/SYLTLX20140062","DOIUrl":"https://doi.org/10.11729/SYLTLX20140062","url":null,"abstract":"","PeriodicalId":35450,"journal":{"name":"Shiyan Liuti Lixue/Journal of Experiments in Fluid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84147138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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