انجمن هیدرولیک ایران نشریه علمی هیدرولیک 2345-4237 4 2 2009 08 23 Hydraulics of Air-Water Flow in a Pressurized Pipeline Model Using Image Processing بررسی هیدرولیکی جریان آب و هوا در مدل آزمایشگاهی مجرای تحت فشار به روش پردازش تصاویر 19 34 85520 10.30482/jhyd.2009.85520 FA عبدالرضا کبیری سامانی دانشیار، دانشکده مهندسی عمران، دانشگاه صنعتی اصفهان 0000-0002-5984-3892 سیدمحمود برقعی امیرحسین پیرقطاری Journal Article 2009 03 23 The study of two-phase fluid flow is of great importance in tunnels and pressurized pipelines, due to<br />the disturbances caused by pressure fluctuation, bubble bursting, energy release and erosion. The gas<br />releases from the water as the pressure reduces, and, hence, trapped in water pipelines. This effect has<br />been observed and found to be detrimental.<br />The image processing technique is applied for estimating different parameters such as; void fraction<br />and length, period and celerity of unstable two-phase slug flow, using Photoshop and Matlab software,<br />based on experimental model. Necessary images were collected using two digital cameras. It is shown<br />that, the image processing technique can be used as a good tool for determination of two-phase flow<br />characteristics. Results show that the slug flow characteristics including length, frequency and celerity<br />have significant effects on void fraction. By increasing the air/water discharge ratio the void fraction<br />increases and by in creasing the slug frequency the void fraction decreases. https://jhyd.iha.ir/article_85520_6fdbc4ed6d32bd540f526774523666e1.pdf