Computer Science

Computer Science ›› 2024, Vol. 51 ›› Issue (6A): 230900053-9.doi: 10.11896/jsjkx.230900053

• Interdiscipline & Application • Previous Articles     Next Articles

Adaptive Modification Turbulence Model for Flow Field of Aircraft Calculating in Three Dimensions

PENG Ge1, XU Xinggui2, LI Zhongwu2, REN Weihe3, LI Kang3, ZHENG Guoxian3, DENG Hongyan3   

  1. 1 School of Big Data,Baoshan University,Baoshan,Yunnan 678000,China
    2 School of Information Science,Yunnan University of Finance and Economics,Kunming 650221,China
    3 Beijing Institute of Space Mechanics Electricity,Beijing 100081,China
  • Published:2024-06-06
  • About author:PENG Ge,born in 1993,master,researcher.His main research interests include artificial intelligence,pattern recognition and signal processing.
    XU Xinggui,born in 1985,assistant professor.His main research interests include image processing and search using theoretical and computational methods of information geometry.
  • Supported by:
    Less Developed Regions of the National Natural Science Foundation of China(62161051),Scientific Research Foundation of the Education Department of Yunnan Province,China(2023J0678),Science-Technology Foundation Yunnan Province,China(202101BA070001-016) and Laboratory of Yunnan Key Laboratory of Service Computing(YNSC23119).

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Abstract: In view of the problems of fluid compressibility judgment relying on empirical knowledge and the lack of confinement constraints in the current three-dimensional simulation methods for vehicle outer flow field,an adaptive modification turbulence calculating model for the three dimensions vehicle outer flow field is proposed.The proposed algorithm adopts the density-weighted average N-S equation to calculate the flow field distribution of the compressible fluid according to the a priori knowledge of the coefficient of variation of the vehicle outer flow field,and utilizes two strategies,namely,expansion-compression modification and surge indeterminate modification to modify the compressibility constraints of the k-ε turbulence model in an adaptive way,and uses the wall function to modify the constraints in the near-wall region in an approximate computation.Experimental results of three-dimensional modeling and visualization of the outer flow field distribution of a certain type of unmanned aerial vehicle(UAV) show that when the Mach value reaches 1.5,the compressibility modification algorithm produces effects obviously.The proposed adaptive compressibility modification model is able to effectively judge the change of gas compressibility and improve the accuracy of fluid distribution calculation.

Key words: Turbulence, 3D simulation of outer flow field, Density-weighted averaged numerical simulation method, Compressibilitycorrection

CLC Number: 

  • TP391
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