Aerodynamic optimization design of mixed exhaust nozzle based on FFD technique
-
摘要: 以内外涵混合排气喷管为研究对象,建立了控制体与喷管网格模型的映射关系,通过控制点运动实现了喷管内、外涵双层壁面与网格同步、大曲率变形,并应用优化拉丁超立方设计(OLDH)方法创建了实验样本点。在此基础上,利用Isight软件驱动网格自由变形(FFD)模块和CFD仿真模块完成了所有样本点计算。结果表明:通过优选设计仿真结果,喷管推力系数提高0.6%,总压损失降低0.6%。对优选造型采用多段线+圆弧的方式进行了几何特征提取,获得的参数化造型与优选造型性能接近,具有一定的工程实用价值。
-
关键词:
- 混合排气喷管 /
- 自由变形(FFD)技术 /
- 优化拉丁超立方设计(OLHD) /
- 自动化仿真流程 /
- 几何特征提取
Abstract: As a mixed exhaust nozzle was taken as the research object, the mapping relation between the arbitrary shape deformation volume and a mixed exhaust nozzle sketch was built. Through movement of the control points, synchronously large curvature deformation of the profiles and grid was realized. Whats more, experimental samples were established with application of the optimal Latin hypercube design (OLHD) method. On this basis, as the free form deformation (FFD) and CFD modules were driven by the Isight software, all the sample points were calculated. According to the simulation results, optimum sketch was selected with 0.6% increase of the thrust coefficient and 0.6% reduction of the total pressure loss. Finally, multi-lines and arcs were adopted to parameterize the optimum sketch with no performance degeneration, which can be used in engineering practice. -
[1] 刘大响,叶培梁.航空发动机设计手册:第7册 进排气装置[M].北京:航空工业出版社,2000. [2] EDWARDS C L W,SMALL W J,WEIDNER J P.Studies of scramjet/airframe integration techniques for hypersonic aircraft[R].AIAA 75-58,1975. [3] BAYSAL O,ELESHAKY M,BURGREEN G.Aerodynamic shape optimization using sensitivity analysis on third-order Euler equations[J].Journal of Aircraft,1993,30(6):953-961. [4] 陈兵.空间推进算法及超燃冲压发动机部件优化设计研究[D].北京:北京航空航天大学,2005.CHEN Bing.A Space-marching algorithm with application to scramjet components optimization design[D].Beijing:Beijing University of Aeronautics and Astronautics,2005.(in Chinese) [5] 贺旭照,倪鸿礼,周正,等.吸气式高超声速飞行器三维后体尾喷管优化设计[J].推进技术,2009,30(6):687-690.HE Xuzhao,NI Hongli,ZHOU Zheng,et al.3D afterbody nozzle optimization of air-breathing hypersonic vehicle[J].Journal of Propulsion Technology,2009,30(6):687-690.(in Chinese) [6] YAMAZAKI W,MOUTON S,CARRIER G.Efficient design optimization by physics-based direct manipulation free-form deformation[R].AIAA-2008-5953,2008. [7] SEDERBERG T W,PARRY S R.Free-form deformation of solid geometric models[J].Computer Graphics,1986,20(4):151-160. [8] GRIESSMAIR J,PURGATHOFER W.Deformation of solids with trivariate B-spline[M].Chichester:Elsevier,1989. [9] LAMOUSIN H J,WAGGENSPACK W N.NURBS-based free form deformation[J].IEEE Computer Graphics and Applications,1994,14(6):59-65. [10] COQUILLART S.Extended free-form deformation:a sculpturing tool for 3D geometric modeling[J].Computer Graphics,1990,24(4):187-193. [11] BECHMANN D,BERTRAND Y,THERY S.Continuous free form deformation[J].Computer Networks and Integrated Services Digital Network Systems,1996,29(14):1715-1725. [12] MAECRACKEN R,JOY K I.Free-form deformations with lattices of arbitrary topology[R].New York:Conference on Computer Graphics and Interactive Techniques,1996. [13] SONG Wenhao,YANG Xunnian.Free form deformation with weighted T-splines[J].The Visual Computer,2005,21(3):139-151. [14] 朱心雄.自由曲线曲面造型技术[M].北京:科学出版社,2000. [15] 高翔,高扬,李密.基于响应面法的混合排气涡扇发动机喷管特性研究[J].航空科学技术,2016,27(11):19-24.GAO Xiang,GAO Yang,LI Mi.Research on nozzle characteristics of a mixed exhaust turbofan engine based on response surface methodology[J].Aeronautical Science and Technology,2016,27(11):19-24.(in Chinese) [16] 谷海涛,林洋,胡志强,等.基于代理模型的水下滑翔机机翼优化设计方法[J].机械工程学报,2009,45(12):7-14.GU Haiyang,LIN Yang,HU Zhiqiang,et al.Surrogate models based optimization method for the design of underwater glider wing[J].Journal of Mechanical Engineering,2009,45(12):7-14.(in Chinese) [17] 苗萌,曾鹏,阎超.基于替代模型的三维后体尾喷管优化设计[J].空气动力学学报,2013,31(5):641-646.MIAO Meng,ZENG Peng,YAN Chao.Surrogate-based optimization of 3D after body nozzle[J].Acta Aerodynamica Sinica,2013,31(5):641-646.(in Chinese) [18] 刘晓路,陈英武,荆显荣,等.优化拉丁方试验设计方法及其应用[J].国防科技大学学报,2011,35(5):73-77.LIU Xiaolu,CHEN Yingwu,JING Xianrong,et al.Optimized Latin hypercube sampling method and its application[J].Journal of National University of Defense Technology,2011,35 (5):73-77.(in Chinese) [19] GU Rui,XU Jinglei,FAN Zhipeng,et al.Numerical investigation of performance of the air tab in the turbofan nozzle[J].Journal of Propulsion and Power,2014,30(5):1272-1280.
点击查看大图
计量
- 文章访问数: 643
- HTML浏览量: 6
- PDF量: 482
- 被引次数: 0