Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Mechanics in Engineering》 2006-01
Add to Favorite Get Latest Update

EXPERIMENT OF SURFACE COATING DRAG REDUCTION MECHANISM IN GAS TRANSPORTATION PIPE

JIANG Nan SUN Wei Department of Mechanics, Tianjin University, Tianjin 300072, China  
The velocity time sequence at different vertical locations in a turbulent pipe flow with different surface coating was carefully measured by IFA300 constant-temperature anemometer with a resolution higher than the frequency with respect to Kolmogorov dissipative scale. A method is put forward to calculate the skin friction velocity by means of nonlinear iteration, in order to achieve a non-perturbed or micro-perturbed measurement of wall shear stress. The relationship among some inner-scale physical parameters, e.g., the mean-velocity profile, skin friction velocity and fluid dynamics viscosity, and the relationship between skin friction velocity and skin friction shear stress were used in accurately calculating the skin friction drag based on the precise measurement of logarithmic mean-velocity profile in the near wall region of turbulent boundary layer. The velocity signals were decomposed into multi-scale eddy structures by wavelet transform. A conditional sampling technique for the multi-scale coherent eddy structure detection from the simultaneous turbulent field was introduced using the multi-scale instantaneous intensity factor and multi-scale flatness factor of wavelet coefficients. Coherent eddy structures for different scales were extracted by this technique and the mechanism of surface coating drag reduction is investigated for gas transportation of turbulent pipe flow.
【Fund】: 国家自然科学基金项目(10472081 10232020)联合资助.
【CateGory Index】: TB126
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
【References】
Chinese Journal Full-text Database 1 Hits
1 CAI Shu-peng Institute of High Pressure Water Jet, Hunan University of Technology, Zhuzhou 421008, China,JIN Guo-yu, LI Da-mei State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China Yang Lin College of Mechanical and Electrical Engineering, Chongqing Jiaotong University, Chongqing 400074, China;DRAG REDUCTION EFFECT OF COUPLING FLEXIBLE TUBES WITH TURBULENT FLOW[J];水动力学研究与进展B辑(英文版);2008-01
【Citations】
Chinese Journal Full-text Database 1 Hits
1 FAN Xing JIANG Nan(Department of Mechanics, Tianjin University,Tianjin 300072, China);SKIN FRICTION MEASUREMENT IN TURBULENT BOUNDARY LAYER BY MEAN VELOCITY PROFILE METHOD[J];Mechanics and Engineering;2005-01
【Co-citations】
Chinese Journal Full-text Database 4 Hits
1 SONG Bao-wei,LIU Zhan-yi,HU Hai-bao,HUANG Ming-ming,HUANG Qiao-gao,MA Ji(College of Marine,Northwestern Polytechnical University,Xi'an 710072,Shaanxi,China);Research on Flow Field of Turbulent Boundary between Smooth and Riblet Surfaces[J];Acta Armamentarii;2009-06
2 TIAN Yan1,LIU Wei2,JIANG Nan1,TIAN Jun3(1.Tianjin Key Laboratory of Modern Engineering Mechanics,Tianjin University,Tianjin 300072,China;2.Air Traffic Management College,Civil Aviation University of China,Tianjin 300300,China;3.Department of Mechatronics and Information Engineering,Tianjin City Vocational College,Tianjin 300250,China);Drag reduction by periodic pressure/suction perturbations of wall turbulence[J];Journal of Harbin Engineering University;2009-12
3 CAI Shu-peng Institute of High Pressure Water Jet, Hunan University of Technology, Zhuzhou 421008, China,JIN Guo-yu, LI Da-mei State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China Yang Lin College of Mechanical and Electrical Engineering, Chongqing Jiaotong University, Chongqing 400074, China;DRAG REDUCTION EFFECT OF COUPLING FLEXIBLE TUBES WITH TURBULENT FLOW[J];水动力学研究与进展B辑(英文版);2008-01
4 LIU Zhan-yi,SONG Bao-wei,HU Hai-bao,HUANG Qiao-gao,HUANG Ming-ming(College of Marine,Northwestern Polytechnical University,Xi'an 710072,China);Experiment Investigation on the Drag-reduction Characteristics above Riblet Surface in Wind Tunnel[J];Journal of Experimental Mechanics;2008-05
【Co-references】
Chinese Journal Full-text Database 3 Hits
1 FAN Xing JIANG Nan(Department of Mechanics, Tianjin University,Tianjin 300072, China);SKIN FRICTION MEASUREMENT IN TURBULENT BOUNDARY LAYER BY MEAN VELOCITY PROFILE METHOD[J];Mechanics and Engineering;2005-01
2 CONG Qian, FENG Yun, REN Lu-quan(Key Laboratory for Terrain-Machine Bionics Engineering Ministry of Education,Jilin University,Changchun 130025,China);Affecting of riblets shape of nonsmooth surface on drag reduction[J];Journal of Hydrodynamics(Ser.A);2006-02
3 CAI Shu-peng~1,TANG Chuan-lin~1,LI Da-mei~2(1.Institute of High Pressure Water Jet,Zhuzhou Institute of Technology,Zhuzhou 412008,China;2.School of Water Resources and Hydropower,Wuhan University,Wuhan 430072,China);Experimental study on drag reduction effect by self-excited vibration of flexible tubes[J];Advances in Science and Technology of Water Resources;2006-01
【Secondary Citations】
Chinese Journal Full-text Database 3 Hits
1 Dai Ghanghui, Liu Tianshu, Teng Yongguang and Ming Xiao(Nanjing Aeronautical Institute);MEASURING TECHNIQUES FOR WALL SHEARING STRESS IN TURBULENT BOUNDARY LAYER[J];Acta Aeronautica Et Astronautica Sinica;1988-05
2 Zhou Xinghua;Zhou jianhe(Tianjin University);MEASUREMENTS OF VELOCITY DISTRIBUTION NEAR THE WALL WITH HOT WIRE ANEMOMETER[J];;1996-01
3 Shi Jianjun; Zhou Xinghua(Tianjin University);An Experimental Investigation on the Hot-Wire Anemometer Measurement Near Walls[J];JOURNAL OF EXPERIMENTAL MECHANICS;1995-03
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved