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首页> 外文期刊>Heat Transfer Engineering >Multiphase Thermodynamic Tables for Efficient Numerical Simulation of Cavitating Flows: A Novel Look-Up Approach Toward Efficient and Accurate Tables
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Multiphase Thermodynamic Tables for Efficient Numerical Simulation of Cavitating Flows: A Novel Look-Up Approach Toward Efficient and Accurate Tables

机译：多相热力学表，用于空化流的高效数值模拟：一种新颖，高效，精确的表查询方法

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摘要

In this paper a numerical simulation of unsteady sheet cavitation is presented as it occurs on an NACA-0015 hydrofoil. The computational approach is based on the Euler equations for unsteady compressible flow, using an equilibrium cavitation model of Schnerr, Schmidt, and Saurel. It was found that for a computational method that directly uses the thermodynamic closure relations, more than 90% of the computational time was spent in computations associated with these relations. To circumvent this problem, the computationally costly method is replaced by using precomputed multiphase thermodynamic tables containing the same information, with no need to determine the flow phase. The thermodynamic computations using this approach are almost instantaneous. However, preparing these multiphase tables is not straightforward. The main difficulty is due to the slope discontinuities in the phase-transitioning regions of the multiphase tables. In these regions, the conventional look-up approaches are inaccurate and inefficient (their accuracy is insensitive to data grid refinement). To remove this bottleneck, phase-oriented interpolations in transition cells is developed as a novel approach that allows for preparing much more accurate and efficient (much smaller size) multiphase thermodynamic tables compared to conventional interpolation approaches.
机译：在本文中，对非稳态薄板空化发生在NACA-0015水翼上的数值模拟进行了介绍。该计算方法基于不稳定的可压缩流的欧拉方程，使用Schnerr，Schmidt和Saurel的平衡空化模型。发现对于直接使用热力学闭合关系的计算方法，超过90％的计算时间花费在与这些关系相关的计算中。为了解决这个问题，使用包含相同信息的预先计算的多相热力学表代替了计算上昂贵的方法，而无需确定流动相。使用这种方法的热力学计算几乎是瞬时的。但是，准备这些多阶段表并不简单。主要困难是由于多相工作台的相变区域中的斜率不连续。在这些区域中，常规的查找方法不准确且效率低下（它们的精度对数据网格的细化不敏感）。为了消除此瓶颈，过渡单元中的面向相位的插值被开发为一种新颖的方法，与传统的插值方法相比，该方法允许准备更准确，更有效（尺寸更小）的多相热力学表。

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  • 来源
    《Heat Transfer Engineering》 |2015年第11期|1065-1083|共19页
  • 作者

    FARAZ KHATAMI; EDWIN VAN DER WEIDE; HARRY HOEIJMAKERS;

  • 作者单位

    Department of Mechanical Engineering, University of Twente, P.O. box 217, 7500 AE Enschede, The Netherlands;

    Department of Mechanical Engineering, University of Twente, Enschede, The Netherlands;

    Department of Mechanical Engineering, University of Twente, Enschede, The Netherlands;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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