FINITE-STATE INDUCED FLOW MODELS .1. 2-DIMENSIONAL THIN AIRFOIL

被引：215

作者：

PETERS, DA

KARUNAMOORTHY, S

CAO, WM

机构：

[1] Center for Computational Mechanics, Washington University, St. Louis, MO, 63130

[2] Department of Aerospace Engineering, Parks Colleg, St. Louis University, Cahokia, IL

[3] Department of Mechanical Engineering, Washington University, St. Louis, MO, 63130

来源：

JOURNAL OF AIRCRAFT | 1995年 / 32卷 / 02期

基金：

美国国家航空航天局;

关键词：

D O I：

10.2514/3.46718

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

A new finite state aerodynamic theory is presented for incompressible, two-dimensional flow around thin airfoils. The theory is derived directly from potential flow theory with no assumptions on the time history of airfoil motions. The aerodynamic states are the coefficients of a set of induced-flow expansions. As a result, the finite state equations are hierarchical in nature and have closed-form coefficients. Therefore, the model can be taken to as many states as are dictated by the spatial texture and frequency range of interest with no intermediate numerical analysis. The set of first-order state equations is easily coupled with structure and control equations and can be exercised in the frequency or Laplace domain as well as in the time domain. Comparisons are given with Theodorsen theory, Wagner theory, and other methods. Excellent results are found with only a few states.

引用

页码：313 / 322

页数：10

共 24 条

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