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Development of a two-dimensional design tool for the centrifugal compressor impellers.

机译：开发用于离心式压缩机叶轮的二维设计工具。

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摘要

This work describes a computer based impeller design system that integrates geometry with aerodynamic analysis. The system is capable of analyzing the impeller performance using a two-dimensional flow theory. Detailed viscous aerodynamic analysis can follow using Computational Fluid Dynamics, (CFD).; Currently, the most widely practiced method of designing impellers has been to use very simple, one-dimensional inviscid flow techniques. While this is a convenient and straightforward design methodology, the flow within impellers is by no means one-dimensional. Using this One-D technique, which goes from One-Dimensional to Three-Dimensional, has significant error which has to be corrected empirically and by trial. Also, the total analysis cost for this method includes (1) geometry setup time, (2) analysis time, and (3) time iterating on geometry and analysis until an acceptable design is achieved. This has led to the search for an improved and efficient design tool preceding the CFD analysis. This is the contribution of this thesis.; A two-dimensional FORTRAN code was developed using a quasi-orthogonal method to generate the grid of any arbitrary impeller geometry by constructing streamlines from inlet to outlet and quasi-orthogonal stations to the streamlines from hub to shroud to obtain the relative velocity gradient along them. The code uses a systematic iterative method until a suitable output is converged. This developed program as a design tool contains less error and requires much less time and effort to interact with the CFD code. It is also simple and understood easily.; It is believed that the program developed will increase design process efficiency by reducing analysis time and error.
机译：这项工作描述了基于计算机的叶轮设计系统，该系统将几何形状与空气动力学分析相集成。该系统能够使用二维流动理论分析叶轮性能。可以使用计算流体动力学（CFD）进行详细的粘性空气动力学分析。当前，设计叶轮的最广泛实践的方法是使用非常简单的一维无粘性流动技术。尽管这是一种方便，直接的设计方法，但叶轮内的流动绝不是一维的。使用这种从一维到三维的一维技术，存在明显的误差，必须凭经验进行纠正并通过试验进行校正。同样，此方法的总分析成本包括（1）几何设置时间，（2）分析时间和（3）迭代几何和分析直到获得可接受的设计的时间。这导致在CFD分析之前寻求一种改进且高效的设计工具。这是本文的贡献。使用准正交方法开发了二维FORTRAN代码，通过构造从入口到出口以及准正交站到从轮毂到导流罩的流线的流线来生成任意叶轮几何形状的网格，以获得沿它们的相对速度梯度。该代码使用系统的迭代方法，直到收敛了合适的输出为止。这个开发的程序作为设计工具，包含的错误更少，并且与CFD代码进行交互所需的时间和精力更少。它也很简单，很容易理解。相信开发的程序将通过减少分析时间和错误来提高设计过程的效率。

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  • 作者

    Mahroogi, Faisal O.;

  • 作者单位

    Michigan State University.;

  • 授予单位 Michigan State University.;
  • 学科 Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 2004
  • 页码 148 p.
  • 总页数 148
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

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