تاثیر زاویه کارگذاری لوله نیمه مدفون بر میزان آبشستگی و رسوبگذاری اطراف لوله در قوس ۹۰ درجه ملایم با استفاده از مدل آزمایشگاهی

Due to the importance of the subject in the fluid transfer industry, the way of pipelines across the width and bed of the rivers has been especially noticed in recent decades. In fluid transmission line projects, buried and semi-buried pipe passage through river arches is inevitable. This changes the pattern of scouring and sedimentation in the arch of the river. The scouring pattern around the pipeline is different from the case where the pipeline crosses a straight stream. Due to the expansion of transmission lines in recent years, in this research, the effect of the placement angle of the pipeline in a mild 90 degree arc was investigated in a laboratory. The experiments of this research were carried out in three different landing numbers, three different angles of 90, 67.5, and 45 degrees from the mild arc, and the position of the pipe was repulsive to the flow direction. The results showed that with the increase of the angle to the arc, the scour under and around the pipe increases. Also, by reducing the Froud number, the amount of scouring around and under the pipe is reduced; So that in some scenarios, scouring under the pipe was not observed.