Journal of South China University of Technology(Natural Science) >

2023 , Vol. 51 >Issue 3: 41 - 52

DOI: https://doi.org/10.12141/j.issn.1000-565X.220306

Energy, Power & Electrical Engineering

Optimization of Body Profile Line of Axial Flow Control Valve Based on Surrogate Model

  • LI Shuxun ,
  • HU Yinggang ,
  • LI Cheng ,
  • WU Hanlin ,
  • SHEN Hengyun
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  • College of Petrochemical Technology/Machinery Industry Pump and Special Valve Engineering Research Center，Lanzhou University of Technology，Lanzhou 730050，Gansu，China
李树勋（1973-），男，教授，博士生导师，主要从事控制类阀门等研究。

Received date: 2022-05-20

  Online published: 2022-11-03

Supported by

the National Natural Science Foundation of China(51569012)

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Abstract

Aiming at the problems of long optimization cycle and mechanical repetition of the optimization process for large-diameter natural gas pipeline valves at home and abroad, this paper proposed a method for optimizing the profile of axial flow control valves using Kriging surrogate model combined with NSGA-Ⅱ algorithm. Taking the DN600 axial flow regulating valve as the research object, after preliminary evaluation of its performance by Fluent and ANSYS software, it selected the flow value, maximum stress level and maximum deformation as the optimization goals. First, the B-spline curve was used to analyze the valve body type. By changing the coordinates of the control points, the parameterization of the valve body profile could be realized, and the automatic modeling of the valve body profile could be realized. The Latin hypercube sampling method was used to design 100 types of profiles, and the structural optimization sample library was obtained through numerical simulation. Kriging surrogate model for an axial flow control valve was established. Then, the NSGA-Ⅱ algorithm was used to optimize the surrogate model to obtain the Pareto front solution set, and the optimal profile was determined by studying the front solutions of the three profiles and the velocity and pressure variation curves of the horizontal section inside the initial profile. The opening-resistance characteristics, flow-resistance characteristics and internal flow of the pipeline behind the valve were studied before and after optimization. The research results show that the optimized profile flow value increased by 9.2%, the maximum stress level decreased by 8.46%, and the maximum deformation is reduced by 6.2%, the fluid resistance is reduced after optimization, and the influence distance of high-speed flow in the pipeline after optimization is reduced. The performance improvement of the optimized profile proves the effectiveness of the profile optimization method and reveals the potential of the method in the field of valve profile structure optimization.

Key words： multi-objective optimization; profile line optimization; surrogate model; axial flow control valve; numerical simulation

Cite this article

LI Shuxun , HU Yinggang , LI Cheng , WU Hanlin , SHEN Hengyun . Optimization of Body Profile Line of Axial Flow Control Valve Based on Surrogate Model[J]. Journal of South China University of Technology(Natural Science), 2023 , 51(3) : 41 -52 . DOI: 10.12141/j.issn.1000-565X.220306

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