Analyses of wind-tunnel test data of the transonic airfoil RAE2822

BAI Wen

doi:10.7638/kqdlxxb-2022.0027

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Analyses of wind-tunnel test data of the transonic airfoil RAE2822

更新时间：2026-05-28

- Analyses of wind-tunnel test data of the transonic airfoil RAE2822
- Vol. 41, Issue 6, Pages: 55-70(2023)
- 作者机构：
  
  中国航空研究院,北京,100012
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2022.0027
  CLC： V211.41
- Published：2023
- 稿件说明：
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白文. 经典跨声速翼型RAE2822数据分析[J]. 空气动力学学报, 2023, 41(6): 55−70.

BAI Wen. Analyses of wind-tunnel test data of the transonic airfoil RAE2822[J]. 2023, 41(6): 55-70.
白文. 经典跨声速翼型RAE2822数据分析[J]. 空气动力学学报, 2023, 41(6): 55−70. DOI： 10.7638/kqdlxxb-2022.0027

BAI Wen. Analyses of wind-tunnel test data of the transonic airfoil RAE2822[J]. 2023, 41(6): 55-70. DOI： 10.7638/kqdlxxb-2022.0027.

摘要

经典跨声速翼型RAE2822风洞试验数据长久以来被广泛用于CFD计算方法和软件的验证与确认，但是数据的正确使用或者说合理使用仍存在一些需要研究和注意的问题，包括计算网格、风洞试验数据修正、中弧线修正、翼型几何定义和建模，以及摩擦阻力系数和边界层速度剖面的原始定义等。在开展CFD研究之前，必须首先对计算方法进行验证，尤其是要先尽可能消除计算结果对计算网格的依赖性；经过对目前可开放使用的计算网格的不足之处进行分析，研制了一套高品质的计算网格并获得了预期的一阶网格收敛性；通过计算软件交叉验证，进一步确保所用计算软件的可信度。在将CFD计算结果与翼型风洞试验数据进行比对时，通常需要对马赫数和攻角进行修正，且如何修正是一个需要持续研究的问题；翼型中弧线修正是一种有效的方法，但需要考虑流动参数的影响。原始翼型几何构型采用有限离散点定义，计算网格生成过程中需要采用插值方法布置型面网格点，不同插值方法对于翼型前缘附近流动的数值模拟有细微影响。多数相关研究工作只比对压力分布；少数研究工作会比对摩擦阻力系数、边界层及尾迹速度剖面，但在比对时，需要注意原始风洞试验相关参数定义与CFD计算常用定义的区别。

Abstract

Even though wind-tunnel test data of the classical transonic airfoil RAE2822 have been widely exploited for validating numerical methods and CFD (computational fluid dynamics) solvers for decades

such validations still require special attention to uncertainties. These uncertainties mainly come from the computational grid

experimental data correction

geometry definition

correction and modeling

the definition of skin friction coefficient

and boundary layer velocity profile. Prior to validating CFD results

numerical methods need to be validated first. Especially

CFD results are supposed to be grid-independent. For this purpose

this paper develops a set of high-quality computational grids that avoid existing open-source grids' deficiencies

yielding expected grid convergence. Moreover

the fidelity of the adopted CFD solver in the present study is cross verified with other solvers. When comparing CFD and experimental results

it is necessary to correct Mach numbers and (or) angles of attack. Although effective

the camber correction is not universal but needs to consider flow conditions such as Mach number

angle of attack

and Reynolds number. A limited number of discrete points defines the original airfoil geometry. Therefore

it is inevitable to interpolate the geometry to generate grids. However

different interpolation methods show minor effects on the numerical simulation of the flow field around the airfoil leading edge

where the curvature is the largest. Most relevant CFD research work only compared pressure distributions with wind-tunnel test data; A few studies compared the frictional resistance coefficient

boundary layer and wake velocity profile

but in comparison

it is necessary to pay attention to the difference between the definition of relevant parameters of the original wind tunnel test and the common definition of CFD calculation.

关键词

Keywords

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