回転二重管内を通る流れ

概要

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In this paper the authors have calculated the loss of head of turbulent flow through rotating annular pipes and heat transfer coefficients on the both surfaces of pipes. In the calculation it has been assumed that the velocity distribution of flow from the wall followed the formula of 1/7th power. The results obtained are that the loss of head and heat transfer coefficients increase with the angular velocity of pipes and the ratio of the inner radius to the outer radius, and that heat transfer coefficient on the inner surface is larger than that on the outer surface, but the quantity of heat is transferred more from outer surface than from the inner surface. If the angular velocity contained in the equations mentioned above is put to zero, the equations for the loss of head, heat transfer coefficients and the quantity of heat in the case of flow through fixed annular pipes are obtained.