ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Drag Prediction Based on Overset Grids with Implict Hole Cutting Technique
Received date: 2012-07-31
Revised date: 2012-09-10
Online published: 2012-10-18
Supported by
National Natural Science Foundation of China (10972183)
A multi-layer multi-block overset grid technique is presented to accurately simulate the viscous flows around the wing-body-tail (WBT) configuration of a common NASA research model (CRM). Based on the hierarchical overset grid strategy and the implicit hole cutting algorithm, this technique selects the "best" cells located in the overlapped regions by the criterion of cell size, rather than bydetermining whether a computed cell is lying inside (hole cell) or outside (not a hole cell) of a specified region. Four types of grids are built for a CRM WBT configuration proposed in the fourth drag prediction workshop (DPW-4), and viscous flows around the configuration are analyzed by an in-house computational fluid dynamic (CFD) solver. The numerical results show that all the aerodynamic forces matched well with those of CFL3D and OVERFLOW, which demonstrates the accuracy and efficiency of the in-house CFD solver. When the angle of attack is larger than 3°, separation bubbles at the wing and tail trailing edge have some influence on the aerodynamic performance of the CRM WBT configuration. The overset grid density is used to study drag prediction, and computational drag is more accurate with larger sizes of grids. Because the two turbulence models present different predictions of the effect of lift-drag performance, selection of turbulence models is also worth considering on drag prediction.
XU Jia , LIU Qiuhong , CAI Jinsheng , QU Kun . Drag Prediction Based on Overset Grids with Implict Hole Cutting Technique[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013 , 34(2) : 208 -217 . DOI: 10.7527/S1000-6893.2013.0024
[1] van Dam C P. Recent experience with different methods of drag prediction. Progress in Aerospace Sciences, 1999, 35(8): 751-798.
[2] Levy D W, Zickuhr T, Vassberg J, et al. Summary of data from the first AIAA CFD drag prediction workshop. AIAA-2002-841, 2002.
[3] Lain K R, Vassberg J C, Wahls R A, et al. Summary of data from the second AIAA CFD drag prediction workshop. AIAA-2004-555, 2004.
[4] Vassberg J C, Brodersen O P, Wahls R A, et al. Summary of the fourth AIAA CFD drag prediction workshop. AIAA-2010-4547, 2010.
[5] Thompson J F, Weatherill N P. Aspects of numerical grid generation: current and art. AIAA-1993-3539, 1993.
[6] Prewitt N C, Belk D M, Shyy W. Parallel computing of overset grids for aerodynamic problems with moving grids. Progress in Aerospace Sciences, 2000, 36(6): 117-172.
[7] Yan C. The method and application for computational fluid dynamics. Beijing: Beihang University Press, 2006:200-201. (in Chinese) 阎超. 计算流体力学方法及应用. 北京: 北京航空航天大学出版社, 2006: 200-201.
[8] Lee Y L, Baeder J D. Implicit hole cutting—a new approach to overset grid connectivity. AIAA-2003-4128, 2003.
[9] Liao W, Cai J, Tsai H M. A multigrid overset grid flow solver with implicit hole cutting method. Computer Methods in Appllied Mechanics Engineering, 2007, 196(9):1701-1715.
[10] Landmann B, Montagnac M. A highly automated parallel Chimera method for overset grids based on the implicit hole cutting technique. International Journal for Numerical Methods in Fluids, 2011, 66(6): 778-804.
[11] Tian S L. The algorithm study on unstructured overset grid. Nanjing: College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, 2008. (in Chinese) 田书玲. 基于非结构网格方法的重叠网格算法研究.南京: 南京航空航天大学航空宇航学院, 2008.
[12] Yasuhiro W, Meng S L. A flux splitting scheme with high-resolution and robustness for discontinuities. NASA Technical Memorandum 106452, Washington, D.C: Microfiche, 1994.
[13] Vos J B, Leyland P, van Kemenade, et al. NSMB handbook version 5.0. IMHEF-DGM-EPFL, 2003.
[14] Menter F R. Zonal two-equation k-ω turbulence model for aerodynamic flows. AIAA-1993-2906, 1993.
[15] Edwards J R, Chandra S. Comparison of eddy viscosity-transport turbulence models for three-dimensional, shock-separated flowfields. AIAA Jounal, 1996, 34(4): 756- 763.
[16] Pan Y F. An auto-disposal technology of overlap grid methed and its application on CFD. Changsha: College of Aerospace and Materials Engineering, National University of Defense Technology, 2005. (in Chinese) 庞宇飞. 重叠网格自动处理技术及其应用. 长沙: 国防科学技术大学航天与材料工程学院, 2005.
[17] 4th CFD drag prediction workshop. URL: http://aaac.larc.nass.gov/tsab/cfdlarc/aiaa-dpw/, email: dpw@cessna.textron.com, June 2009.
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