湍流模型对弯管磨损计算的影响分析

Analysis on the influence of turbulence model on elbow erosion calculation

    摘要
  • 摘要:
      目的  弯管是船舶管路系统中的常见部件，为准确预测弯管内部的磨损情况，
      方法  采用数值模拟方法对弯管内部的流场进行计算分析，主要从湍流模型对弯管流场计算的影响以及湍流模型对弯管处冲蚀磨损计算的影响这2个方面，对弯管内固、液两相流的磨损预测方法进行深入研究。
      结果  结果表明：SST k-ω湍流模型结合Oka磨损模型可以较准确地计算弯管处的冲蚀磨损速率；湍流模型会给磨损计算带来显著影响，不仅影响最终磨损计算的数值大小，同时还会给预测的相对磨损分布情况带来明显差异。
      结论  研究成果可为后续管路磨损预测的工程应用提供相关依据。

     

    Abstract:
      Objectives  The elbow is a common component of ship piping system. Efforts have been made in order to predict the elbow erosion accurately.
      Methods  In this paper, the numerical simulation is conducted to calculate and analyze the flow field inside the pipe. From the two aspects, i.e. the influence of the turbulence model on the prediction of the flow field in the elbow and the influence of turbulence model on elbow erosion calculation, intensive research into the method to predict the erosion of elbow by solid and liquid flows.
      Results  The results show that the SST k-ω turbulence model, together with the Oka erosion model, can accurately predict the flow field distribution in the elbow. Turbulence model brings a significant impact on the abrasion calculation, where it affects the calculated value of final erosion and also makes a great difference in the distribution of predicted relative erosion.
      Conclusions  The obtained results can provide guidance for future pipe erosion prediction.

     

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