Numerical study on mechanical properties of seaplane in whole water surface landing process
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摘要:
数值方法模拟水上飞机的水面降落运动姿态和受力的全过程，是结合了水汽两相流、运动学和动力学的复杂问题。采用基于Fluent商用软件开发的整体运动网格方法结合VOF方法进行自由面捕捉，采用六自由度模型进行运动状态模拟，对某型水上飞机水面降落的全过程进行了数值模拟，得到了较好的模拟结果，验证了整体运动网格方法在处理水上飞机水面降落问题时具备良好的适应性。通过模拟得到过载曲线、运动状态参数和水面状况，将降落过程划分为冲击、滑水、漂浮3个阶段，并通过对各阶段的分析总结出对水面降落过程的一般性认识，以期为水上飞机的设计研发提供方法和参考。
Abstract:The numerical method is used to simulate the whole process of seaplane landing movement attitude and force, which is a complex problem combining water vapor two-phase flow, kinematics and dynamics. In this paper, the global motion grid method based on Fluent commercial software is combined with VOF method for free surface capture and six-degree-of-freedom model for motion state simulation. The numerical simulation of the water surface landing of a certain type of seaplane is carried out. The simulation results verify that the overall motion grid method has good adaptability when dealing with the surface landing problem of seaplanes. Through the simulated overload curve, motion state parameters and water surface condition, the landing process is divided into three stages:impact, water skiing and floating. Through the analysis of each stage, the general understanding of the water surface landing process is summarized. Methods and references are provided for the design and development of seaplanes.
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Key words:
- seaplane /
- CFD /
- global motion grid /
- landing process /
- motion state
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图 4 某型水上飞机几何特征和计算网格
Figure 4. Geometric features and computational grid of a certain seaplane
图 6 冲击阶段运动状态和过载变化历程曲线
Figure 6. Motion state and overload history curves during impact stage
图 7 冲击阶段0.55 s水面状况和机身底部压力云图
Figure 7. Water surface condition and pressure contour of the bottom of fuselage at 0.55 s during impact stage
图 8 冲击阶段0.6~2.0 s机身底部压力云图
Figure 8. Pressure contour of the bottom of fuselage for 0.6-2.0 s during impact stage
图 9 滑水阶段运动状态和过载变化历程曲线
Figure 9. Motion state and overload history curves during water skiing stage
图 10 滑水阶段水面状况和机身底部压力云图(机身后段未入水)
Figure 10. Water surface condition and pressure contour of the bottom of fuselage during water skiing stage (tail does not touch water)
图 11 滑水阶段水面状况和机身底部压力云图(机身后段入水)
Figure 11. Water surface condition and pressure contour of the bottom of fuselage during water skiing stage (tail touches water)
图 12 漂浮阶段运动状态和过载变化历程曲线
Figure 12. Motion state and overload history curves during floating stage
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[1] 褚林塘.水上飞机水动力设计[M].北京:航空工业出版社, 2014:2-3.CHU L T.Seaplane hydrodynamic design[M].Beijing:Aviation Industry Press, 2014:2-3(in Chinese). [2] VON KARMAN T.The impact on seaplane floats during landing: NACA-TN-321[R].[S.l.]: NACA, 1929. [3] WAGNER H.Vber Stoß-und Gleitvorgänge an der Oberfläche von Flüssigkeiten[J].ZAMM-Zeitschrift für Angewandte Mathematik und Mechanik, 1932, 12(4):193-215. doi: 10.1002/zamm.19320120402 [4] WANG J, LUGNI C, FALTINSEN O M.Experimental and numerical investigation of a freefall wedge vertically entering the water surface[J].Applied Ocean Research, 2015, 51:181-203. doi: 10.1016/j.apor.2015.04.003 [5] MAYO W L.Analysis and modification of theory for impact of seaplanes on water: NACA-TR-810[R].[S.l.]: NACA, 1945. [6] MILWITZKY B.A generalized theoretical and experimental investigation of the motions and hydrodynamic loads experienced by V-bottom seaplanes during step-landing impacts: NACA-TN-1516[R].[S.l.]: NACA, 1948. [7] MILLER R W.Theoretical analysis of hydrodynamic impact of a prismatic float having freedom in trim: NACA-TN-2698[R].[S.l.]: NACA, 1952. [8] PARKINSON J B, OLSON R E, HOUSE R O.Hydrodynamic and aerodynamic tests of a family of models of seaplane floats with varying angles of dead rise: NACA-TN-716[R].[S.l.]: NACA, 1939. [9] PARKINSON J B, OLSON R E, DRELEY E C, et al.Aerodynamic and hydrodynamic tests of a family of models of flying-boat hulls derived from a streamline body: NACA-TR-766[R].[S.l.]: NACA, 1943. [10] 王明振.水上飞机水载荷试验方法探讨[M]//褚林塘, 叶树林.水上飞机文集.北京: 航空工业出版社, 2011: 376-382.WANG M Z.Discussion on test method of waterborne water load[M]//CHU L T, YE S L.Seaplane collection.Beijing: Aviation Industry Press, 2011: 376-382(in Chinese). [11] 魏飞, 许靖锋.飞机模型水上迫降试验测控系统设计[M]//褚林塘, 叶树林.水上飞机文集.北京: 航空工业出版社, 2011: 383-391.WEI F, XU J F.Aircraft model water landing test and control system design[M]//CHU L T, YE S L.Seaplane collection.Beijing: Aviation Industry Press, 2011: 383-391(in Chinese). [12] PENTECOTE N, KOHLGRUBER D.Crash on water: A highly multi-physics problem[C]//14th European Conference and Exhibition on Digital Simulation for Virtual Engineering, 2004: 1-10. [13] 杜小弢, 吴卫, 龚凯, 等.二维滑坡涌浪的SPH方法数值模拟[J].水动力学研究与进展, 2006, 21(5):579-586. http://d.old.wanfangdata.com.cn/Periodical/sdlxyjyjz200605004DU X T, WU W, GONG K, et al.Numerical simulation of SPH method for two-dimensional landslide surge[J].Hydrodynamic Research and Development, 2006, 21(5):579-586(in Chinese). http://d.old.wanfangdata.com.cn/Periodical/sdlxyjyjz200605004 [14] STRECKWALL H, LINDENAU O, BENSCH L.Aircraft ditching:A free surface/free motion problem[J].Archives of Civil & Mechanical Engineering, 2007, 7(3):177-190. [15] 屈秋林, 刘沛清, 郭保东, 等.某型客机水上迫降的着水冲击力学性能数值研究[J].民用飞机设计与研究, 2009(s1):64-69.QU Q L, LIU P Q, GUO B D, et al.Numerical study on the impact mechanical performance of a passenger aircraft on the water landing[J].Civil Aircraft Design and Research, 2009(s1):64-69(in Chinese). [16] QIU L J, SONG W B.Efficient decoupled hydrodynamic and aerodynamic analysis of amphibious aircraft water takeoff process[J].Joural of Aircraft, 2013, 50(5):1369-1379. doi: 10.2514/1.C031846 [17] QU Q L, HU M X, GUO H, et al.Study of ditching characteristics of transport aircraft by global moving mesh method[J].Journal of Aircraft, 2015, 52(5):1550-1558. doi: 10.2514/1.C032993 [18] 张浪, 程用胜, 王福新.上飞机静水起飞过程水气耦合性能分析[J].科学技术与工程, 2018, 18(11):190-195. http://d.old.wanfangdata.com.cn/Periodical/kxjsygc201811029ZHANG L, CHENG Y S, WANG F X.Coupled hydrodynamic and aerodynamic performance analysis of seaplane take-off process in calm water[J].Science Technology and Engineering, 2018, 18(11):190-195(in Chinese). http://d.old.wanfangdata.com.cn/Periodical/kxjsygc201811029 [19] 段旭鹏, 孙卫平, 魏猛, 等.基于OpenFOAM的水上飞机水面高速滑行研究[J].航空学报, 2019, 40(1):522330.DUAN X P, SUN W P, WEI M, et al.Numerical simulation of amphibious aircraft at high speed during taxiing on water using OpenFOAM[J].Acta Aeronautica et Astronautica Sinica, 2019, 40(1):522330(in Chinese). [20] HIRT C W, NICHOLS B D.Volume of fluid (VOF) method for the dynamics of free boundaries[J].Journal of Computational Physics, 1981, 39(1):201-225. doi: 10.1016/0021-9991(81)90145-5 [21] MUZAFERIJA S, PERIC M, SAMES P, et al.A two-fluid Navier-Stokes solver to simulate waterentry[C]//Proceedings of the 22nd Symposium on Naval Hydrodynamics, 1998: 277-289. [22] MCBRIDE E E, FISHER L J.Experimental investigation of the effect of rear-fuselage shape on ditching behavior: NACA-TN-2929[R].[S.l.]: NACA, 1953. -
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