Roughness Effect on an Unsteady Flow in Pipelines by Profilometry and Imaging Techniques

摘要: Problem statement: Currently the aero dynamical calculation in gas pipes is carried out under assumption of steady state conditions. However real a network scarcely quasisteady. Approach: The unsteady governed by non-linear partial differential equations leading to mathematical difficulties. And there are fore pipe dimensions computed at extreme Results: In order precisely describe flow closely conditions, we suggest characterizing roughness two pieces removed during repair damaged from transport network. Samples characterization profilometry (using stylus instrument) and imaging techniques procedures show effect its impact for dynamic state. approach considered cases construct model then proceeded through extensive simulation twenty four hours build graphical means comparing measurement data. Conclusion/Recommendations: obtained results good agreement with those analysis our interpretation express that high rates energy lose due friction inner walls characterized this loose more important as turbulent. Differences shown between data values figures usually exploited. Design parameter settings should be after thorough study.