The rotational velocity rpm in all versions tested are summarized in Figures 8 , 9 and 10 , measured over nine radius of a cup current meter. From these figures it can be inferred that the versions of the device where the vortex reached the maximum rotational velocity were the V8D and V9D; however, in the first of these two alternatives, the vortex displayed maximum values for that variable in the two largest flow rates. Because of this, it was selected as the best.
The experiment also revealed that the rotation velocity increases with decreasing diameter and the distance to the discharge orifice, figure In the absence of a suitable torque meter for the tests, the power of the vortex in the cylindrical chamber was estimated using the integral analysis, considering as the control volume the inside of the vortex chamber, with tangential opening and side discharge orifice. This analysis was done for steady state incompressible flow and uniform velocity of the flow in any section, regardless of energy losses.
Thus equation 1 was found to estimate the power in the first vortex P. Where: p water density, A device width, e height of the smallest section of the nozzle and V 3 velocity at the inlet orifice of the cylinder chamber. In the laboratory, a device was tested in order to known if it was able to form a vortex when immersed in a flow open channel. Its size was deter mined by testing twelve versions of it for finding which generates the most intense vortex and captures the highest flow rate in different hydrodynamic conditions.
Height of the orifice fed vortex chamber or the discharge orifice diameter in each device was varied. From the results it is concluded that: a The device was able to form a vortex with the water captured in the channel, because it does not produce stagnation despite being intrusive and highly form resistance, b The vortex rotation velocity vary based on the captured flow rate, the dimensions of vortex chamber entry width, and the discharge orifice diameter, c the rotation velocity of the vortex depends on radius and its axial position, being greater when the radius is smaller and closer to the discharge orifice d the captured flow rate also depends on the width and height vortex chamber entry and the diameter of the discharge orifice.
The authors stress that the estimated power values are a first approximation based upon an elemental analysis that did not take into account the energy losses due to the high resistance of shape of the device. This vortex generator opens the possibility of harnessing the energy of natural currents to generate mechanical power to drive a turbine impeller, the impeller of a submersible pump, and other processes not yet identified. The authors acknowledge the support of the Vice-Rector of Research at the Uni versity del Valle through the granting research project CI Lugt, Vortex flows in nature and technology.
Malambar, Krieger: Alekssenko, P. Kuibin and V. Childs, Rotating Flow. Oxford, UK: Elsevier, Church and J. Church, D. Burgess, C. Doswell and R. Davies-Jone , Ed. Geophysics Union, Washington, D.
C, , pp. Doi: Nolan and B. June Farag, "An investigation of the confined vortex flow of liquids". George Williams Univ. Li and H. Chen, "Formation and influencing factors of free surface vortex in a barrel with a central orifice at bottom", J. Ogawa, T. Ikari, H. Murakami and K. Ezure, N. Kimuraa, K.http://trampolina.pro/components/localiser-mon/fimy-espionner-un-mobile.php
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Hayashia, and H. Heat Trans. Lewellen, "A review of confined vortex flow", Nat. Aeronautics Space admin. CR, July Goglia and D.
Aeronautics Space ad min. New Brunswick Rutgers, Sta. Chapokpour, "Flow Visualization in Vortex Chamber".
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Civil Eng. Egarr, M. G Faram, T. O'Doherty, and N. Syred, "Experimental study of a hydrodynamic vortex separator", J.
Order from chaos: Vortex studies are first proof of decades-old theory
McCann, "An experimental study on the free surface verti cal vortex", Exp. Fluids , vol. Guidice, C. Gisonni, and G. Hong Kong, Hong Kong, Zhao, D. Zhu, S. Sun, and Z. Or consider the hyperlink, invented independently by Mr. Engelbart and the computing evangelist Ted Nelson in the mids. It took roughly three decades to reach the public in the form of the World Wide Web. Seeing a plasma display engineered for the Plato educational computing project, he realized that a portable computer with a flat panel display was possible.
Harman, who pronounces himself an incurable optimist. And things appear to be turning his way. With the help of the entrepreneur and environmentalist Paul Hawken, he has established a subsidiary, PaxIT, that is designing quieter and more energy-efficient fans for the computer industry. It is one of a series of five spin-off businesses that Mr.
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Newsletter Sign Up Continue reading the main story Please verify you're not a robot by clicking the box. Invalid email address. Please re-enter. You must select a newsletter to subscribe to. At certain times, negative friction was noted; that is to say, the water seemed to leave the walls of the pipe and flow freely. It remains to be seen how this last result should be interpreted. Basically, it may be said that the technology involving self-organising flow used in the Stuttgart experiments is based on the water rotating around its own axis, while flowing in a spiralling course with a decreasing radius.
The rotation speed increases towards the centre, where a sub-pressure forms. If the flow is sufficiently slow, the water runs more or less straight down the drain. When the flow goes beyond a critical level there is a change, a bifurcation, and the water starts flowing in a vortex.
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In order to get the water to organise itself into this type of flow, it is necessary to provide the right conditions by shaping the geometry or, for example, by introducing different types of guiding rails or pumps, and by taking into account the interaction with the surrounding system - among other things, Schauberger stresses the importance of the vegetation to the temperature of a freely flowing stream. The system is in a state of dynamic stability where there is constant change, but where the structure still remains stable. This is an approach that has a very close affinity with Viktor Schauberger's way of thinking.
Early on, Schauberger noticed that natural, untouched streams have such a structural stability. With these observations as a starting-point, he suggested methods for regulating rivers. These methods are based on the principle of stimulating the water towards self-organisation. By using appropriately chosen guiding devices and vegetation that regulates temperature, he was able to get streams to organise themselves into stable riverbeds. This method of regulating rivers and streams differs from the usual one, according to which an attempt is made to control the water, while the "ecosystem" that is formed by the flowing water and its interaction with the riverbed and the vegetation is ignored - with floods and the erosion of river banks as a natural result.
As an example, Schauberger mentions the supporting capacity of the flow, which influences the structure of riverbanks and sandbanks, which in its turn has an influence on vegetation, which again in its turn has an influence in shaping the water's flow by, for example, cooling it down. The systems are interlocked, each gripping the other by the tail, as it were.
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