A linear approach to the multi-parameter design of three-dimensional turbomachinery blades
A linear approach to the multi-parameter design of three-dimensional turbomachinery blades
复制标题
三维涡轮机械叶片多参数设计的线性方法
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
M. Taylor
中科院分区：
文献类型：
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作者：
S. Shahpar;B. Lapworth;T. D. Pablos;M. Taylor
本文介绍了一种新的三维气动设计系统，在罗尔斯罗伊斯公司开发的线性摄动理论的基础上。通过直接数值微分计算了流动对一组几何设计变量的线性灵敏度。灵敏度被用来构建正向和反向设计模式。设计系统使用完善的工程修改，在几个径向高度独立指定，以构建一个56维的设计空间。该设计系统的一个关键特征是用户自由的图形界面，允许工程师轻松地浏览基本上无限的设计空间。充分理解的几何扰动和高水平的交互性的组合是一个系统，这是一个强大的补充工程师的经验的新功能。本文描述了成功应用线性摄动理论所需的设计系统的要素。该系统以正、反两种方式应用于具有大二次流的现代小展弦比核心涡轮机喷管的设计。提出了一种有效利用多参数设计空间的启发式方法。成功地应用该系统，以减少在一个复杂的湍流三维流场的二次动能的水平。
This paper presents a new three-dimensional turbomachinery design system developed at RollsRoyce, based on linear perturbation theory. The linear sensitivities of the flow to a set of geometric design variables are computed through direct numerical differentiation. The sensitivities are used to construct both forward and inverse design modes. The design system uses well established engineering modifications specified independently at several radial heights to construct a 56-dimensional design space. A key feature of the design system is a user f&idly graphical interface to allow engineers to navigate easily through an essentially unlimited design space. The combination of well-understood geometry perturbations and a high level of interactivity are novel features of a system which is a powerful supplement to the engineer’s experience. In this paper, the elements of design system needed to successfully apply the linear perturbation theory are described. The system is applied in both the forward and inverse modes to the design of a modem low aspect ratio core turbine nozzle with large secondary flows. A novel heuristic approach to the effective use of a multi-parameter design space is presented. The successful application of the system to reduce levels of secondary kinetic energy in a complex turbulent three-dimensional flow field is described.