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flow deflection in Intersected Tubes

Journal of Earth Science 2000年第4期19卷 54-56页

作者： Tian Kaiming Wan Li Department of Water Resources and Environmental Science, China University of Geosciences, Beijing 100083

In order to verify the flow interference at the fracture intersections, a group of hydraulic simulations of crossing flow was carried out. The manifold interference effects at the intersection of fractures on water flow has been confirmed extensively either in the normal or in the oblique intersected tubes as well as in the intersected tubes of either equal or variant diameters. Consequently, suggest that the fissure network can no longer be taken as a set of solitary fractures, but as a set of elementary intersected fractures. The deflection effect at fracture intersections on the water flow should be taken into consideration when is dealt with any theory related to the water migration in fractures.

关键词： crossing flow intersected tube flow deflection flow interference at intersection hydraulic simulation.

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Numerical study of camber and stagger angle effects on the aerodynamic performance of tandem-blade cascades

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Propulsion and Power Research 2018年第1期7卷 30-42页

作者： Behshad Ghazanfari Mahdi Nili-Ahmadabadi Ashkan Torabi-Farsani Mohammad Hossein Noorsalehi Department of Mechanical Engineering Isfahan University of TechnologyIsfahan ***Iran

Jet engine manufacturers and designers are seeking for lighter and smaller type of axial *** the aerodynamic characteristics of blades is carried out by controlling the boundary *** way to control the boundary layer is using tandem ***-blade cascades are capable of using highly loaded stages for axial compressors because they provide more works than single-blade *** other words,tandem blades help to achieve a specified total pressure ratio with less number of ***,one of the most important problems for researchers is to optimize the aerodynamic parameters of tandem *** the geometrical parameters of blades is a method to achieve this *** this work,the stagger and camber angle of each blade are first changed while the other geometrical parameters such as overall camber,total stagger angle,the axial overlap,percent pitch and chord ratio are ***,the overall camber angle of tandem blade is changed by increasing the difference between the stagger angle of the first and second blade while the type of two airfoils,axial overlap and percent pitch,overall chord length and overall stagger angle are *** aerodynamic performances of the generated tandem-blade cascades are obtained using two-dimensional numerical solution of *** this,a viscous turbulent flow solver is used for solving the Navier-Stokes *** these simulations,inlet Mach number is fixed to 0.6.

关键词： Tandem blade Axial compressors Cascade Camber angle Stagger angle flow deflection Loss coefficient

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