2013 1(12)

HYDRODYNAMIC HEATING OF TINY LIQUID

Burov A.A., Burov A.I., Gamolich V.Ya., Didyk D.A.

Odessa national polytechnic university, Odessa, Ukraine

The purpose carried out researches is to prove the possibility of heat and movement water the rotating spring in the tube. The analytical dependences determining the rotating spring water heating in a closed cylindrical vessels and closed circuits. The algorithm for estimating temperature field includes: determining the velocity field, the rate of deformation tensor calculation, calculation of the value of the dissipative function at this time and heating temperature calculation. The analytical dependence for finding the productivity of the spring pump - flow circulating in a closed loop flow.

Experimental researches heating of water in the length of a spring of different length closed loops at different frequencies of rotation and consumption of the circulating flows in all cases showed a monotonic dependence on the temperature difference from the heating time. Dual reduction the length of the circulating flow and amount of heated water double the speed of its heat. Such same increase in heating rate achieved by doubling the frequency of rotation the spring and flow rate of the circulating water.

Time of heating in all cases is divided into three approximately equal interval: before the appearance of cavitation cavity; the emergence of discrete zones of cavitation and low-temperature boiling of water; occurrence of throughout length of the spring a continuous reverse flow vapor mixture. The cross section of the arising central vortex is approximately equal one third of the diameter of the pipe. Continuous reverse flow moves from top to bottom, steam and gas bubbles float up in a vertical tube at the bottom to upwards in the spring. The short spring with two turns revolved in a closed cylindrical vessel with different frequencies. RPM springs were measured by laser tachometer. With increasing rotational speed of the spring is accelerating the heating of the same, compared with the length closed contour the number of water. In all modes, the water heated faster than closed circuits. Monotonicity raise the temperature of the vessel walls is enhanced by acceleration of a rotation of water. Cavitation central region with a transverse dimension of about one third of the diameter of the vessel is formed by increasing the RPM of water. It confirms the correctness of the vortex model of swirling flow with a honeycomb structure.

First proved the feasibility and effectiveness of combining movement, twisting, heat and low temperature boiling liquid drops by rotating the spring in the tube.

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