Lagrangian simulation method of droplet collection efficiency for complex configuration
-
摘要: 为了完善拉格朗日法在求解三维复杂外形液滴收集率的过程中存在的普适性缺陷,发展了一种鲁棒且高效的三维收集率计算方法。该方法中采用基于非平面交叉判定的粒子定向查找算法,实现了多面体网格下的水滴快速定位功能。基于笛卡儿网格自适应和壁面网格投影技术,克服了复杂迎风面收集率计算的困难。对比传统求解方式,具有算法复杂度低、计算效率高的优势。同时,利用径向基函数插值技术,改进了三维壁面收集率的表征方法。通过典型算例测试,计算结果与实验值误差均在15%以内,且在同等计算精度的条件下,计算所需的水滴轨迹数大幅减小。验证了该方法具备较高的准确性和良好的鲁棒性,能够为飞机结冰机理研究以及防除冰系统设计提供参考。
-
关键词:
- 液滴撞击特性 /
- 收集率 /
- 径向基函数(RBF) /
- 粒子追踪 /
- 拉格朗日法
Abstract: A robust and efficient algorithm was developed for calculating the droplet collection efficiency and overcoming the non-universal defect in the Lagrangian method. A point-locating scheme based on a non-plane intersection determination algorithm was used to achieve the fast localization of droplets in polyhedron mesh. Using mesh adaptive refine techniques and curve projection algorithm, the difficulty of calculating collection efficiency on complex configuration was avoided. This step effectively reduced the complexity of the algorithm. The analysis results discretely distributing in the spatial configuration was interpolated to the model surface by radial basis function. Some cases valuated the improved algorithm. The testing report showed that the deviation of the calculating results using the proposed method from the experimental data was not more than 15% and the necessary trajectories for calculation significantly decreased compared with the traditional model. It shows that the this method has high engineering practice value and popularization sense. -
[1] 高郭池,丁丽,李保良.气动除冰类飞机结冰风洞试验适航审定技术[J].实验流体力学,2019,33(2),85-94. GAO Guochi,DING Li,LI Baoliang.Airworthiness certification technology about icing wind tunnel test for pneumatic de-icing aircraft[J].Journal of Experiments in Fluid Mechanics,2019,33(2):85-94.(in Chinese) [2] WILLIAM B W.Validation results for LEWICE 3.0[R].AIAA 2005-1243,2005. [3] REID T,BARUZZI G,OZCER I.FENSAP-ICE simulation of icing on wind turbine blades:Part 1 performance degradation[R].AIAA 2013-0750,2013. [4] SAEED F, BRETTE C, FREGEAU M.A three-dimentional water droplet trajectory and impingement analysis program[R].AIAA 2005-4838,2005. [5] POTAPCZUK M G, BIDWELL C S.Swept wing ice accretion modeling[R].AIAA-90-0756,1990. [6] 孙志国,朱春玲.三维机翼表面水滴撞击特性计算[J].计算物理,2011,28(5):677-685. SUN Zhiguo,ZHU Chunlin.Calculation of water-droplet impingement on wing surface[J].Chinese Journal of Computational Physics,2011,28(5):677-685.(in Chinese) [7] 易贤,王开春,林业伟.结冰面水滴收集率欧拉计算方法研究及应用[J].空气动力学报,2010,28(5):596-601. YI Xian,WANG Kaichun,GUI Yewei.Study on Eulerian method for icing collection efficiency computation and its application[J].Acta Aerodynamic Sinica,2010,28(5):596-601.(in Chinese) [8] 陈希,招启军.考虑遮蔽区影响的旋翼三维水滴撞击特性计算新方法[J].航空学报,2017,38(6):120745.1-120745.12. CHENG Xi,ZHAO Qijun.New method for prediciting 3-D water droplet impingement on rotor considering incluence of shadow zone[J].Acta Aeronautica et Astronautica Sinica,2017,38(6):120745.1-120745.12.(in Chinese) [9] 张文英,常士楠,蒋斌.基于VOD方法的大水滴袋状破碎的仿真研究[J].空气动力学报,2018,36(4):605-612. ZHANG Wenying,CHANG Shinan,JIANG Bing.Numerical simulation of large droplets in bag breakup regime based on VOF method[J].Acta Aerodynamic Sinica,2018,36(4):605-612.(in Chinese) [10] HAMED A.Numerical simulations of ice droplet trajectories and collection efficiency on aeroengine rotating machinery[R].AIAA 2005-1248,2005. [11] BIDWELL C S.Particle trajectory and icing analysis of the E3 turbofan engine using LEWICE3D(version 3)[R].NASA/TM-2012-217696,2012. [12] CHAO Q,LOTH E.Numerical study of droplet trajectory and collection efficiency in IRT with large blockage effects[R].AIAA 2017-4376,2017. [13] WIDHALM M, RONZHEIMER A, MEYER J.Lagrangian particle tracking on large unstructured three-dimensional meshes[R].AIAA 2008-472,2008. [14] 赵钟,张来平,何磊,等.适用于任意网格的大规模并行CFD计算框架PHengLei[J].计算机学报,2019,11(11):2368-2383. ZHAO Zhong,ZHANG Laiping,HE Lei,et al.PHengLei:a large scale parallel CFD framework for arbitrary grids[J].Chinese Journal of Computers,2019,11(11):2368-2383.(in Chinese) [15] JOHN R.Droplet size distribution effects on aircraft ice accretion[J].Journal of Aircraft,1985,22(6):503-508. [16] HASELBACHER A.An efficient and robust particle-localiztion algorithm for unstructured grids[J].Journal of Computational Physics,2007,225(2):2198-2213. [17] RAMSEY S, POTTER K, HANSEN C.Ray bilinear patch intersections[J].Journal of Graphics Tools,2004,9(3):41-47. [18] LOHNER R, AMBROSIANO J.A vectorized particle tracer for unstructured grids[J].Journal of Computer Physics,1990,91(1):22-31. [19] WANG G.Improved point selection method for hybrid-unstructured mesh deformation using radial basis functions[J].AIAA Journal,2014,53(4):1016-1025. [20] TONG X L,LUKE A.Eulerian simulations of icing collection efficiency using a singularity diffusion model[R].AIAA 2005-1246,2005.
点击查看大图
计量
- 文章访问数: 83
- HTML浏览量: 11
- PDF量: 110
- 被引次数: 0