Method for calculating flow pressure loss of flexible hose

• Main Authors: WANG SHANSHAN, LIU WEIXIN, GAO LIANG, GU AOLIN, HUANG FAN, WANG YONG, TIAN HAOYU
• Format: Patent
• Language: Chinese; English
• Published: 08.11.2022
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention discloses a method for calculating the flow pressure loss of a flexible hose. The method comprises the following steps: (1) determining the relationship between the pipe wall tensile stress and the internal pressure of the hose based on material mechanics; (2) on the basis of a Labbin head loss theory, an iterative calculation method and a material and fluid coupling relationship, determining on-way pressure loss under the condition of considering the deformation of the hose; (3) determining local pressure loss under hose deformation based on hose deformation characteristics; (4) predicting the lowest point position of the hose in use based on the fluid momentum theorem to prevent the hose from being touched; and (5) calculating the total pressure loss of the hose. The method has the advantage that the prediction result is accurate and comprehensive. 本发明公开了一种柔性软管的流动压力损失计算方法，包括以下步骤：(1)基于材料力学确定软管管壁拉应力与内压的关系；(2)基于列宾宗水头损失理论、迭代计算方法与材料、流体耦合关系，确定考虑软管发生变形下的沿程压力损失；(3)基于软管变形特点确定软管发生变形下的局部压力损失；(4)基于流体动量定理预