Bent pipe parameter determination method

Abstract

The invention relates to a bent pipe parameter determination method and belongs to the technical field of fluid dynamics and mechanical vibration. The method comprises the steps of dividing a bent pipe into a plurality of bending sections, wherein a to-be-determined parameter of each bending section includes a curvature radius and a bending angle; creating a bent pipe model by use of an original curvature radius of the bent pipe, a port position coordinate, and the curvature radius and the bending angle of each bending section; setting a constraint condition and optimizing the bent pipe modelby use of the constraint condition; and determining the to-be-determined parameter of each bending section by use of the optimized bent pipe model. According to the method, the bent pipe is divided into the plurality of bending sections, the purposes of reduction of vortexes inside a high-pressure and high-speed pipeline and secondary flow can be achieved only through the detailed tubular design of the bending part on the premise of not modifying the structure size of the bent pipe, and the working efficiency of a hydraulic system is improved while reducing the pressure loss of the bent pipe.

Description

technical field [0001] The present disclosure relates to the technical field of fluid dynamics and mechanical vibration, in particular, to a method for determining parameters of a bent pipe. Background technique [0002] The right-angle (90°) curved conduit is a curved layout form often used in hydraulic and fuel pipeline structures in the aviation and aerospace fields, and can be used to connect two sections of fluid medium transmission in perpendicular directions. Among them, the aircraft design manual and the relevant pipeline standards require that the curved pipeline of the aircraft should be bent at a right angle of 90° as much as possible, and the bending radius should be at least twice the outer diameter of the conduit (Outer Diameter, OD), that is, 2*OD. [0003] The traditional right-angle elbow adopts a one-piece direct bending form. However, the analysis of hydrodynamics shows that a one-piece direct bending elbow tends to form a large eddy current in the right-...

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Problems solved by technology

Therefore, affected by it, it is prone to failures such as pipeline noise, cracks, fatigue fractures, and loosening and leakage of pipeline connection parts.

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