STATIC BLADE FOR AXIAL FLOW FLUID MACHINE

摘要

PURPOSE:To convert fluid energy into work efficiently with dynamic blade by gradually decreasing the inclined angle of mounting in the direction of contact line of a static blade rear edge from the base of the static blade toward the tip to meet the specified condition and so setting the inclined angle as to have positive inclined angle at the tip. CONSTITUTION:The shape of a static blade rear edge 6 is so set as to meet the following condition, in the step of an axial flow fluid machine consisting of a group of static blades and a group of dynamic blades. That is, when the rotating direction 9 of the dynamic blade is defined as positive, the inclined angle of the base of the static blade, as thetar and the inclined angle of the tip of the static blade, as thetat, the inclined angle of mounting in the direction of contact line of the static blade rear edge 6 is, so that they may be thetarthetat0, gradually decreased from the base of the static blade toward the tip of the static blade and so set as to have a positive inclined angle even at the tip. Further when the rotating direction 9 of the dynamic blade is defined as positive and the radial position in each section in the length direction of the static blade is defined as R, the inclined angle theta is made to change under the condition of Rtheta k (k is constant).