Turbulator and mode of turbulating a flow

FIELD: the invention refers to experimental hydrodynamics and may be used for definition of the resistance of small objects to a running flow at tests.

SUBSTANCE: the arrangement is fulfilled in the shape of a grate with the width Bt. and the height ht, deepened at the height T formed by rods with a step ▵ fixed in the supporting contour and is located at a certain distance in front of the tested object. At that it is installed with possibility of independent displacement relatively to the tested object and is fastened on the object and/or the body or probably on the bodies moving together with the tested object relatively to the test gondola. It is also may be formed by a system of private turbulators fulfilled in the shape of grates with a different size of cells, with possibility of their independent displacement relatively to each other including the fastening on different bodies and located primary in-series. The private turbulators may be fulfilled in the shape of grates particularly with different main direction of the rods of the grate. The mode is in locating the turbulator in front of the tested object with possibility of independent displacement relatively to the tested object and fastening on the object and/or on the body probably on the bodies moving together with the tested object particularly to test gondola. At that the position of the turbulator relatively to the tested object particularly the distance and displacement relatively to the tested object and also deepening and probably dimensions are chosen on the basis of comparison of results of the trial run of tarring of objects of different scales.

EFFECT: possibility of investigating of small models and revelation of the influence of resistance of the surface of the model.

6 cl, 3 dwg

 

The invention relates to the field of engineering, namely the determination of the resistance of the incident flow of small models of objects under test.

Known energizers [1]which represents the wire diameter 1,0-1,5 mm, mounted on the model surface of the hull in the area of the first theoretical frame or pin tumbler cylinder with a diameter of 3 mm and a height of 2.5 mm These energizers do not allow us to study the model of small scale and impact of the local resistance of the body, such as local defects of the hull in the form of the corrugation of the outer skin.

The task on which the invention is directed, is a preliminary provision of turbulence in the flow, incident on the test sample.

Technical result achieved at the same time, the opportunity to study small models and determine the effect of the local resistance of the surface of the model.

To achieve the technical result used external (relative to the test sample), in particular, lattice design turbulizer, possibly with different main direction of the lattice. This turbulator can be formed as a system of private turbulizer.

Turbulator (system turbulizer) have before the test object at some distance, on the way of flow. Priceman can be mounted either on the test object, and separately, and to move away from him at a certain (possibly variable) distance, this may change and its depth. As mechanisms of change in distance can be used, in particular, the screw mechanisms and supply chain. To determine the effort flow effects on turbulator can be separate from the test object by the dynamometer. When applying turbulizer, as a system of consecutive private turbulizer, each of them can have independent drive and logger effort, be attached to different bodies, including several. Moreover, private energizers can be mutually perpendicular to the base location of the rods. The order and move turbulizer (turbulizer) and possibly dimensions are determined on the basis of the results of checks of the calibration objects of different scales.

Figure 1 shows the test model of the ship hull with fixing turbulizer cart (gandola) of the water tank; figure 2 - diagram of the test model of the ship hull with turbulization fixed on the model; figure 3 is a variant of the lattice remote turbulizer with vertical slots (cells).

The experimental device consists of (1, 2) of the truck 1, the towing wheels 2, the driven wheel , test gondolas 4 dynamometer 5 model 6, the knife 7, the sheath 8, turbulizer 9, equipped with a dynamometer 10 with the bracket 11 and the mechanisms of change in the distance to the examined object is made, in particular, in the form of a screw feeder 12, the console 13. Turbulator 9 (figure 3) consists of a lattice of widthTheight hTthat deepens on the height of the T formed by the rods 13 with the step Δenshrined in the reference circuit 14.

Turbulator works as follows. Incoming flow, passing through the grating turbulizer 9, pre-turbulized that allows you to get away from laminar flow in most of the surface of the test object. When modeling the acceleration and deceleration of the tested objects you can change the distance from the remote turbulizer to the test object by means of the feed mechanism 12. When attaching turbulizer 9 on the examined object readings of the dynamometer 10 (in the absence of the turbulizer of the dynamometer may be a separate driving to mount on the sheath 7) are subtracted from the readings of the dynamometer test object 5, and the result is the actual resistance of the test object. Provides for the application of turbulizer in the form of a system of consecutive private turbulizer with gratings of different geometry, in particular with different cells is/or direction of the rods 1. The distance from the turbulizer 9 to the test object 6 and the distance between private energizers is selected based on the comparison of the results of checks of the calibration objects of different scales.

Sources of information

1. A guide to theory of the ship. In three volumes. Edited Aigosthena, Hydromechanics. The resistance to movement of ships. Ship propulsion. That first. Leningrad: Sudostroenie, 1895. - S-322.

1. Turbolister, characterized in that it is made in the form of a lattice width InTheight hTthat deepens to a height of T formed by rods with step Δenshrined in the reference path, is located in front of the test object with the possibility of independent movement relative to the test object and is attached to the object and/or body, perhaps the bodies moving together with the test object, in particular to test the gondola.

2. Turbulator according to claim 1, characterized in that it can be formed by a system of private turbulizer, made in the form of grids with different cell sizes, with the possibility of independent movement relative to each other, including by posting on different bodies, and located mostly in sequence.

3. Turbulator according to claim 2, characterized in that private energizers are in the form of lattices, in particular, with different main example is the implementation of the rods of the grid.

4. Turbulator according to claim 3, characterized in that private energizers, consistently placed, are mutually perpendicular to the main direction of the rods.

5. The way turbulence in the flow, characterized in that turbulator is located in front of the test object with the possibility of independent movement relative to the test object and is attached to the object and/or body, perhaps the bodies moving together with the test object, in particular to test the gondola.

6. The method according to claim 5, characterized in that the position of the turbulizer relative to the test object, and the depth and possibly dimensions are selected on the basis of comparison of results of checks of the calibration objects of different scales.



 

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