پديد آورنده :
كيخسروي كياني لنباني، علي
عنوان :
بررسي آزمايشگاهي و عددي تأثير شيب وجوه بالادست و پايين‌دست سرريز لبه‌پهن بر ويژگي‌هاي هيدروليكي جريان
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
علوم و مهندسي آب
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي
صفحه شمار :
شانزده، ۱۱۱ص.: مصور، جدول، عكس(رنگي)، نمودار
استاد راهنما :
منوچهر حيدرپور
استاد مشاور :
اسماعيل لندي
توصيفگر ها :
سرريز لبه‌پهن , FLOW-3D , ديناميك سيالات محاسباتي , ضريب دبي(Cd) , محل تشكيل عمق بحراني
استاد داور :
سعيد اسلاميان، سعيد سلطاني كوپايي
تاريخ ورود اطلاعات :
1396/12/08
چكيده فارسي :
20 9 3 8 بررسي عددي فشار 83 9 3 3 برخي از نتايج سهبعدي به دست آمده از نرمافزار 220 فصل چهارم نتيجهگيري و پيشنهادها 4 0 نتيجهگيري 020 4 0 پيشنهادها 920 منابع 820 چكيده انگليسي 500 ازده
چكيده انگليسي :
009 Laboratory and Numerical Investigation of the Effect of Upstream and Downstream Slope of Broad crested Weir on Flow Hydraulic Characteristics Ali Keikhosravy Kiany Lonbany a keikhosravy@ag iut ac ir January 10 2018 Department of Water Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Manouchehr heidarpour heidar@cc iut ac ir Abstract Broad crested weirs are structures that are commonly used and exploited in open channels The purpose of using these weirs is to measure water discharge and also to control the flow through open channels trapezoidal broad crested weirs is one of a kind of broad crested weirs In this study eight experiments were conducted at the Hydraulic Laboratory of Isfahan University of Technology Experimental results such as water surface profiles and velocity profiles for four discharge on U 30 c D45 and U45 c D30 trapezoidal broad crested weirs were obtained Then using the FLOW 3D software version 10 0 1 7 and utilizing the RNG K e turbulence model the flow was simulated for eight existing experiments and numerical results and experimental results were compared The quantitative accuracy of the numerical results of this research was investigated by a variety of statistical indices including NRMSE agreement index d and also the coefficient of Determination R2 In the water surface profiles results the average of the NRMSE d and R2 indices for the eight existing experiments was 2 43 0 9995 and 0 9988 respectively In the velocity profile results the average of the NRMSE d and R2 indices for the eight existing tests was 5 59 0 9682 and 0 9779 respectively The values of statistical indices showed a high agreement between numerical and experimental results So after identifying the power of FLOW 3D in simulating the flow by choosing a discharge and performing simulations on different models a wider examination of numerical results was considered This means that the software was used as a virtual lab and other conditions that was hard to create in the laboratory were created in the software By simulating and obtaining numerical results the effect of different geometric conditions of the trapezoidal broad crested weirs including the upstream and downstream face slope weir crest length etc was investigated on various hydraulic parameters including the location of critical depth formation discharge coefficient head loss etc The results of these studies showed that decreasing upstream face slope increased discharge coefficient and lead the critical flow condition to take place Farther from the beginning of the weir crest but the change in the head loss of flows from the weir does not occur while the change in downstream face slope will not have much effect on the amount of discharge coefficient and the location of critical section but will lead to a change in the head loss By decreasing the downstream face slope of the weir the head loss decreases In addition increasing the weir crest length leads to The head loss decreases as well Keywords Trapezoidal broad crested weirs FLOW 3D RNG K e turbulence model computational fluid dynamics discharge coefficient Cd critical section
استاد راهنما :
منوچهر حيدرپور
استاد مشاور :
اسماعيل لندي
استاد داور :
سعيد اسلاميان، سعيد سلطاني كوپايي
