Moscow Aviation Institute (MAI), Moscow, Russia
S. A. Borisov, Senior Lecturer, e-mail: bsa@cosmoc.com.ru
S. V. Dobrovolskiy, Cand. Eng., Engineer, e-mail: dobrovolskiy_s@mail.ru
Yu. I. Glukhovskaya, Specialist, e-mail: gljul@bk.ru
A. S. Myakochin, Dr. Eng., Prof., e-mail: amyakochin@gmail.com

The method for 3D modeling of variable-shaped steel patches on the outside of a steel pipe critical areas using the SolidWorks CAD system is considered. This method ensures the creation of patches that guarantee the specified service life of a pipeline subject to intense erosive wear during the transportation of high-speed air flow containing powdery or abrasive particles. The shape of the patch in each of its support cross-sections is changed parametrically using a developed computer program depending on results of the erosion rate simulation in the ANSYS Fluent, the pipeline wall thickness and the specified service life of the pipeline. Simulations and modeling performed on the base of pre-created basic parametric 3D models of the pipeline and patches. Considered patch modeling method is based on up-to-date CAD/CAE design techniques. As part of the work, a series of erosion simulations of a two-knee steel pipeline were carried out under different conditions of a heterogeneous air flow with an admixture of sand and nickel particles at different velocities and temperatures. The resulting 3D model of the variable-shaped patch can be used as a basis for setting up the cold-spray manufacturing of its layer-by-layer formation on a pipe.

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