HYDRODYNAMIC UNIT Russian patent published in 2000 - IPC

FIELD: hydrodynamics. SUBSTANCE: invention is related to field of hydrodynamic and magnetohydrodynamic tests and can be used to study dynamics of nonstationary flow of liquid while it passes over various objects and to create flow of specified configuration, for instance, helical one, for magnetodynamic study with large Reynolds numbers. Hydrodynamic stand includes leak-tight closed conduit with rotation axis fitted with electric motor drive and braking system. Test is conducted by way of sudden braking of conduit driven up to speed in advance. In this case liquid moves in conduit under its own momentum and passes over tested object. Characteristic time of braking of liquid amounts to the order of 0.5 s which is sufficient to take necessary measurements, for example, in experiments in modeling of excitation of magnetic field by traveling conducting medium (MHD dynamo). Speed of travel of flow of liquid can achieve 200 m/s and more at initial moment of braking. Maximum speed is determined by strength characteristic of materials of conduit. Conduit can be sped up with the aid of low-power drive which leads to compactness, low cost and low energy consumption by testing stand. EFFECT: compactness of unit, low energy consumption and cost. 1 dwg