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22.10.2012 20:43:55
23.08.2011
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8.1. Experimental investigation of efficiency of the laboratory setup in the aquatic environment.

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The next stage of the study was to investigate the effects obtained by setting performance WHD-1 in the "mover" in the hydro test installation of mooring modes in the period 1995-1997
Operating environment - water.
The purpose of this test:
   1) development of methods of investigation of flexural-torsion flutter of oscillating in the aquatic environment of the array of work items;
   2) making a stand for the research laboratory unit WHD-1 in the "mover" in the hydro test installation of mooring modes;
   3) development of methods of measurement in the study setting WHD-1 in the "propeller" on mooring conditions;
   4) checking of the test device (work items in their geometric parameters and the location are the same as in previous studies in an air stream) in an aqueous medium;
   5) verification of the hypothesis under study increase the capacity of the device with the number of work items;
   6) testing the hypothesis of power change depending on the test device from the change of the surface area of work items.

The device was assembled on the platform, and consisted of eight modules, the number of work items, their geometry and location relative to each other are the same as in the investigation of air flow. Furthermore, it was manufactured and assembled another similar device, which when tested was connected to a serial circuit working with the first device.
Work items are investigated devices have the same drive, in addition, there is the possibility of transmission of energy flow (or movement) from one object to another working on a common drive.

Study design efficiency of the laboratory setup WHD-1 in the flow of water in the mode of propulsion is shown in Fig. 16.

Two identical devices under study are modular with eight work items. They gathered on a common platform and share a common drive shaft 2 is connected to a DC motor 3.
The engine is driven by two sources of DC 4, connected in series (total voltage is 24 V).
The engine, a common drive, transmits the movement to work items studied devices. Working elements (in Fig. not shown) in this experiment is the driver and the interaction with the aqueous medium, add the translational motion of the platform 1, collected from the study modules. The platform is suspended by thin metal strings 5, with work items are immersed in water, filling the pool 6. Platform 1 is connected to a dynamometer 7 bed 8, having the freedom of movement relative to platform 1. On the far wall of the pool 6 has a pointer to a zero level of 9 movement of the platform 1.
Work items are immersed in water, not shown.
In all experiments, the number of revolutions of the DC motor does not change.

In the course of experiments related to the definition of the interaction under study work items, performing as part of an array of reciprocating and rotational oscillations, with an aqueous medium, changed the number of work items and the surface area of the working elements .
Measured parameters: traction force developed by the device.

The essence of the experiment is as follows.
The force of the DC motor 3 through a common drive shaft 2 is transmitted to the work items that are in contact with water set in motion the platform 1. During this process, a pointer is moved relative to the zero level 9. In order to eliminate the effect of strings on which the suspended platform one, working hard to frame 8, the opposite movement of the platform 1, and return the front edge of the platform 1, on one level with a pointer to a zero level 9 . At the same time scale dynamometer 7 defines the tractive force developed by the working elements.

In the first experiment of the first series were employed sixteen working elements of both devices and platforms, which are connected in series, with the work items developed force equal to 115 conventional units on the scale of the dynamometer.
In the second experiment, twelve were involved in the work item, two items have been disabled. In this developed power equal to sixty-two standard units on the scale of the dynamometer.
In the third experiment, one unit was completely disabled (left eight slave. Elements ..) In this developed power equal to thirty-seven standard units on the scale of the dynamometer.
In the fourth experiment were used only four working element. Stem force equal to fourteen standard units.

In the second series of experiments, almost twice the surface area reduces the work items. The experiments were similar to the first series of experiments. With this growing effort equaled seventy, thirty-eight, twenty-one and nine standard units on the scale of the dynamometer.

Plots of pull efforts "P" on the number of «n» and the area «s» work items are presented on FIG. 17 (work environment - water).

On the above chart clearly traced directly increasing traction effort, depending on the number of «n» and the area «s» a work item.

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