The Dynamics Calculations and Research of Electronically Controlled Water Distribution Device

2012 ◽  
Vol 522 ◽  
pp. 342-346
Author(s):  
De Fu Xu ◽  
Ping Dong ◽  
Jun Fan ◽  
Shu Jun Guo
Keyword(s):  
Theoretical Basis ◽  
High Speed ◽  
Water Distribution ◽  
Pressure Field ◽  
Fluid Flows ◽  
Injection Wells ◽  
Structure Of Water ◽  
The Third ◽  
Fluent Software ◽  
Velocity Effect

There are four fluid flows in the water regulator of injection wells the first the second the third and the forth backwash flow.The four fluid flows are used to injection and backwash petroleum wells.Based on the reliability of the water regulator under the high-pressured high speed fluid's function.By using fluent software for the numerical analysis and fluid dynamics,get the velocity and pressure field contours and the cloud chart,under the high pressure and high velocity effect. Meanwhile analysis the results.It is provide a theoretical basis for the optimization of the structure of water distribution device.

Research on Tornado Effect of High-Speed Spiral Flow in the Lifting Pipe

2014 ◽  
Vol 955-959 ◽  
pp. 3544-3547
Author(s):  
Jun Tang ◽  
Rui Jie Gao ◽  
Shu Wen Hu
Keyword(s):  
Differential Equation ◽  
High Speed ◽  
Pressure Field ◽  
Tangential Velocity ◽  
Control Element ◽  
Simulation Test ◽  
Spiral Flow ◽  
Fluent Software ◽  
Velocity Equation ◽  
Simulation Results

Through stress analysis of micro control element,pressure differential equation of lifting pipe was deduced,and tornado effect of high-speed spiral flow was discussed. Secondly, fluent software was used, through which the simulation test of lifting pipe was conducted, pressure field and velocity field were got. The results showed that radial velocity equation and tangential velocity equation and axial velocity equation and pressure equation are consistent with the simulation results.

Design and Simulation of High-Speed Spiral Flow in Hydraulic Lifting System

2014 ◽  
Vol 538 ◽  
pp. 113-117
Author(s):  
Jun Tang ◽  
Rui Jie Gao ◽  
Shu Wen Hu
Keyword(s):  
Energy Consumption ◽  
High Speed ◽  
Pressure Field ◽  
Pipe Wall ◽  
Manganese Nodules ◽  
Simulation Test ◽  
Spiral Flow ◽  
Flow Generator ◽  
Fluent Software ◽  
Lifting System

The high-speed spiral flow generator was designed, by which can produce strong suction and penetration and strong adsorbent spiral flow of manganese nodules, it can form a centripetal pressure field. In the field, the manganese nodules move to the center of pineline and effectively gather near the pipe center, so probability of manganese nodules collision with the pipe wall will be reduced and energy consumption discreases and capability and efficiency of the system will be enhanced. Secondly, Fluent software was used, through which the simulation test of hydraulic lifting was conducted, pressure field and velocity field were got. The results showed that high-speed spiral flow hydraulic lifting is feasible and rational.

Design and Research on a Automatic Cleaning Device of Wind Turbine Blades

2013 ◽  
Vol 448-453 ◽  
pp. 3472-3475
Author(s):  
Tai Lv ◽  
Qiang Wang
Keyword(s):  
Wind Turbine ◽  
High Speed ◽  
Pressure Field ◽  
Turbine Blades ◽  
Positive Pressure ◽  
Wind Turbine Blades ◽  
Cleaning Device ◽  
Horizontal Axis Wind Turbines ◽  
Ash Deposit ◽  
Fluent Software

Aiming at ash deposit problem of wind turbine blades, a cleaning device for 10kW horizontal axis wind turbines was designed by applying the mechanism that ash deposit on blades surface was purged by high-speed flows from nozzle. Using fluent software, a numerical simulation was carried out in cleaning device, and its pressure field and velocity field in different cross section of wind turbine blades were simulated under cleaning state. The results showed that positive pressure zone created by cleaning device was formed on blades surface, and high-speed airflow purging blades surface was formed. As a result, the purpose of cleaning is achieved.

Application Of Elastic Layers To Register Pressure Field On The Model Surface In Supersonic Flow

2016 ◽  
Vol 11 (1) ◽  
pp. 23-33
Author(s):  
Maxim Golubev ◽  
Andrey Shmakov
Keyword(s):  
Surface Waves ◽  
High Frequency ◽  
High Speed ◽  
Pressure Pulsation ◽  
Pressure Field ◽  
Leading Edge ◽  
Supersonic Wind Tunnel ◽  
Register Pressure ◽  
Elastic Layers ◽  
Sharp Leading Edge

The work presents the results of application of panoramic interferential technique which is based on elastic layers (sensors) usage to obtain pressure distribution on the flat plate having sharp leading edge. Experiments were done in supersonic wind tunnel at Mach number M = 4. Sensitivity and response time are shown to be enough to register pressure pulsation against standing and traveling sensor surface waves. Applying high-frequency image acquiring is demonstrated to make possible to distinguish at visualization images high-speed disturbances propagating in the boundary layer from low-speed surface waves

scholarly journals Free boundary problems in shock reflection/diffraction and related transonic flow problems

2015 ◽  
Vol 373 (2050) ◽  
pp. 20140276 ◽  
Author(s):  
Gui-Qiang Chen ◽  
Mikhail Feldman
Keyword(s):  
Free Boundary ◽  
High Speed ◽  
Free Boundary Problems ◽  
Fluid Flows ◽  
Shock Reflection ◽  
Two Dimensional ◽  
Open Problems ◽  
Boundary Problems ◽  
Flow Problems ◽  
Concave Corner

Shock waves are steep wavefronts that are fundamental in nature, especially in high-speed fluid flows. When a shock hits an obstacle, or a flying body meets a shock, shock reflection/diffraction phenomena occur. In this paper, we show how several long-standing shock reflection/diffraction problems can be formulated as free boundary problems, discuss some recent progress in developing mathematical ideas, approaches and techniques for solving these problems, and present some further open problems in this direction. In particular, these shock problems include von Neumann's problem for shock reflection–diffraction by two-dimensional wedges with concave corner, Lighthill's problem for shock diffraction by two-dimensional wedges with convex corner, and Prandtl-Meyer's problem for supersonic flow impinging onto solid wedges, which are also fundamental in the mathematical theory of multidimensional conservation laws.

Simulation of Hypersonic Viscous Flow Past a 2D Circular Cylinder Using Lattice Boltzmann Method

2010 ◽  
Author(s):  
R. Kamali ◽  
A. H. Tabatabaee Frad
Keyword(s):  
Circular Cylinder ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
High Speed ◽  
Fluid Flows ◽  
Boltzmann Distribution ◽  
Equilibrium Distribution Function ◽  
Complex Flows ◽  
Compressible Viscous Flows ◽  
Boltzmann Method

It is known that the Lattice Boltzmann Method is not very effective when it is being used for the high speed compressible viscous flows; especially complex fluid flows around bodies. Different reasons have been reported for this unsuccessfulness; Lacking in required isotropy in the employed lattices and the restriction of having low Mach number in Taylor expansion of the Maxwell Boltzmann distribution as the equilibrium distribution function, might be mentioned as the most important ones. In present study, a new numerical method based on Li et al. scheme is introduced which enables the Lattice BoltzmannMethod to stably simulate the complex flows around a 2D circular cylinder. Furthermore, more stable implementation of boundary conditions in Lattice Boltzmann method is discussed.

scholarly journals Trzy typy manipulacji z punktu widzenia teorii działania

2016 ◽  
Author(s):  
Janusz Maciaszek
Keyword(s):  
Theoretical Basis ◽  
Theory Of Action ◽  
Short Term ◽  
The Third ◽  
Practical Syllogism

By manipulation one can understand an abuse of the influence on other people. As the term ‘abuse’ is vague and unclear, one cannot decide in every instance whether it is an abuse of influence or whether the influence on other people is justified. In the paper I distinguish three types of actions consisting in exercising influence on other people. The theoretical basis for this typology is Donald Davidson’s theory of action, and in particular his notion of reason of action and practical syllogism. The first type of influence consists in modification of rather constant beliefs, preferences, and values. The typical example of an action of this type is brain-washing, The second type of action is modification of short-term attitudes, e.g. beliefs about the environment, wishes and preferences in special situations, etc. The typical example is advertising. In the third type the manipulator does not try to modify attitudes but he intends to provoke “acratic” actions, i.e. actions being the result of week will. The typology permits, at least partially, to precise what the abuse consists in for every type of influence.

scholarly journals Kinematic parameters of goats walking on different slopes and biomimetic walking mechanisms

2017 ◽  
Author(s):  
Fu Zhang ◽  
Yafei Wang ◽  
Wei Wang ◽  
Keyword(s):  
Experimental Data ◽  
Theoretical Basis ◽  
High Speed ◽  
Rate Of Change ◽  
Kinematic Parameters ◽  
High Speed Video ◽  
Experimental Image ◽  
Displacement Speed ◽  
Walking Mechanism ◽  
Uphill Walking

A comparative analysis of the kinematic parameters of a goat on different slopes was conducted to study the kinematic parameters of goats on different slopes with walking mechanics. The uphill walking processes on different slopes (0°, 5°, 10°, 15°, 20°, 25° and 30°) were recorded by a high speed video system (VRI Phantom M110). The experimental image results were processed and analyzed using PCC and MATLAB software. The kinematic parameters were obtained from the goat walking on different slopes; these parameters are the changes of centroid with displacement, speed with time, and acceleration with time. As the gradient in the uphill process increases, the range of centroid fluctuation ranges from 0.079 to 0.59 and the rate of change ranges from 0.4 to 2.2 m/s, while the acceleration of the goat slope decreases. The present research can provide theoretical basis and experimental data for the design of a biomimetic agricultural slope walking mechanism.

scholarly journals Numerical simulation and experimental research of cavitation nozzle based on equation curve

2021 ◽  
Author(s):  
Lifu Wang ◽  
Dongyan Shi ◽  
Zhixun Yang ◽  
Guangliang Li ◽  
Chunlong Ma ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Flow Field ◽  
High Speed ◽  
Quadratic Equation ◽  
Outer Contour ◽  
Study Results ◽  
Fluent Software ◽  
The Impact ◽  
Better Than

Abstract To further investigate and improve the cleaning ability of the cavitation nozzle, this paper proposes a new model that is based on the Helmholtz nozzle and with the quadratic equation curve as the outer contour of the cavitation chamber. First, the numerical simulation of the flow field in the nozzle chamber was conducted using FLUENT software to analyze and compare the impact of the curve parameters and Reynolds number on the cleaning effect. Next, the flow field was captured by a high-speed camera in order to study the cavitation cycle and evolution process. Then, experiments were performed to compare the cleaning effect of the new nozzle with that of the Helmholtz nozzle. The study results demonstrate that effective cavitation does not occur when the diameter of the cavitation chamber is too large. For the new nozzle, with the increase of the Reynolds number, the degree of cavitation in the chamber first increases and then decreases; the cleaning effect is much better than that of a traditional Helmholtz nozzle under the same conditions; the nozzle has the best cleaning effect for the stand-off distance of 300 mm.

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