Scholarlink

<p>We describe disadvantages of the flow part of a&#xa0;typical pressure pipeline system and the design of the flow meter block used in the composition of verification facilities. An important problem encountered in the analysis of a&#xa0;water flow through a&#xa0;complex-shaped flow section of a&#xa0;pressure pipeline system is connected with the separation of flow on the walls, initiation of cavitation in the water flow and vibration of the pipeline system. We propose an approach that excludes the possibility of cavitation in the water flow and vibration of the walls of sections of complex geometric shape of pressure pipeline systems. This is realized by creating a&#xa0;vortex structure of the water flows formed in the receivers of the flow meters with passive flow swirl. We construct geometric models of the flow sections of pressure pipeline systems and flow meter blocks (both typical and promising (with passive flow swirl)). High-resolution grid models with denser near-wall regions adapted for numerical analyses are generated. We determine dimensionless coordinates (local Reynolds numbers in the cells) that can be used to compute the models of turbulence based on the averaging of the Navier-Stokes equations over the Reynolds number. The process of verification of the results of numerical predictions is carried out according to the results of experimental investigation of pressure losses in the flow-meter block of a&#xa0;typical pipeline system. Numerical simulation of pressure losses in the flow-meter block with passive flow swirl of a&#xa0;promising pipeline system is carried out. Based on the results of this simulation, the investigated system is designed, constructed, and experimentally studied. The quality of the turbulent profile of the water-flow velocity in the outlet cross-section of the promising pipeline system is estimated and the influence of coupled vortex structure in the pressure pipeline on the flow structure and the formation of velocity profile in the measuring line is analyzed. The hydraulic efficiency of the flow-meter block with passive flow swirl is justified. A&#xa0;single-phase (cavitation-free) pressure water flow is formed. The proposed approach and the accumulated results can be used either for the development of new verification rigs or for updating the existing devices.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Modeling the hydrodynamic characteristics of water flow in the flow meter block with passive flow swirl in the pipeline system of verification facility

  • 期刊论文

  • 发表日期：

    2026年5月6日

查看全文
  • A. V. Shchelchkov,
  • Yu. B. Alexandrov,
  • R. R. Minnullin,
  • A. R. Tukhvatullin,
  • A. A. Korneev

摘要

We describe disadvantages of the flow part of a typical pressure pipeline system and the design of the flow meter block used in the composition of verification facilities. An important problem encountered in the analysis of a water flow through a complex-shaped flow section of a pressure pipeline system is connected with the separation of flow on the walls, initiation of cavitation in the water flow and vibration of the pipeline system. We propose an approach that excludes the possibility of cavitation in the water flow and vibration of the walls of sections of complex geometric shape of pressure pipeline systems. This is realized by creating a vortex structure of the water flows formed in the receivers of the flow meters with passive flow swirl. We construct geometric models of the flow sections of pressure pipeline systems and flow meter blocks (both typical and promising (with passive flow swirl)). High-resolution grid models with denser near-wall regions adapted for numerical analyses are generated. We determine dimensionless coordinates (local Reynolds numbers in the cells) that can be used to compute the models of turbulence based on the averaging of the Navier-Stokes equations over the Reynolds number. The process of verification of the results of numerical predictions is carried out according to the results of experimental investigation of pressure losses in the flow-meter block of a typical pipeline system. Numerical simulation of pressure losses in the flow-meter block with passive flow swirl of a promising pipeline system is carried out. Based on the results of this simulation, the investigated system is designed, constructed, and experimentally studied. The quality of the turbulent profile of the water-flow velocity in the outlet cross-section of the promising pipeline system is estimated and the influence of coupled vortex structure in the pressure pipeline on the flow structure and the formation of velocity profile in the measuring line is analyzed. The hydraulic efficiency of the flow-meter block with passive flow swirl is justified. A single-phase (cavitation-free) pressure water flow is formed. The proposed approach and the accumulated results can be used either for the development of new verification rigs or for updating the existing devices.