نتایج جستجو برای: water hammer
تعداد نتایج: 553361 فیلتر نتایج به سال:
This paper compares the computational performance of two numerical methods for two models of Transient Flow. One model was defined by method of the Eulerian based expressed in a method of characteristics “MOC”, finite difference form. The other model was defined by method of Regression. Each method was encoded into an existing hydraulic simulation model. Results indicated that the accuracy of t...
We experimentally studied the propagation of coupled fluid stress waves and tube flexural waves generated through projectile impact along the axis of a water-filled tube. We tested mild steel tubes, 38–40 mm inner diameter and wall thicknesses of 0.8 mm, 6.4 mm, and 12.7 mm. A steel impactor was accelerated using an air cannon and struck a polycarbonate buffer placed on top of the water surface...
طی مطالعه فونستیکی در سال 1375 در مزارع پنبه دشت مغان تعداد 12 گونه و 12 جنس متعلق به 8 خانواده از اوریباتیدهای گروه pycnonotic brachypyline شناسایی گردید. از بین آنها ‘ خانواده ها‘جنس ها و گونه های : anderemaeidae: cristeremaeus humeratus balogh et csiszar, 1963; eremellidae: eremella ensifera balogh et mahunka, 1968; eremobelbidae: eremobelba sp. berlese, 1908; licnodamaeidae: licnodamaeidae...
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