楔形体入水时域解的复边界元数值分析

王永虎; 魏照宇

doi:10.11883/1001-1455(2012)01-0055-06

楔形体入水时域解的复边界元数值分析

doi: 10.11883/1001-1455(2012)01-0055-06

王永虎^,,
魏照宇

1.
中国民航飞行学院,四川广汉618307;
2.
西北工业大学航海学院,陕西西安710072

详细信息

通讯作者:
王永虎

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出版历程
- 刊出日期: 2012-01-25

Numericalanalysisforwaterentryofwedgesbasedon acomplexvariableboundaryelementmethod

WANG Yong-hu^,,
WEI Zhao-yu

1.
CivilAviationFlightUniversityofChina,Guanghan618307,Sichuan,China;
2.
Schoolof MarineEngineering,NorthwesternPolytechnicalUniversity,

More Information

Corresponding author: WANG Yong-hu

摘要

摘要: 基于速度势理论,利用复数变量边界元法对二维楔形体常速入水冲击的时域解进行了数值研究。以相似解作为数值计算的初始条件,采用时域解射流线性近似处理方法,利用复数变量边界元法进行求解,以减少计算量和数值误差。深入讨论了扩展坐标系求时域解、射流处理、网格划分和网格更新等关键技术。最后数值计算了不同斜升角楔形体入水时的自由液面隆起、射流飞溅和压力分布,经与相似解结果作比较,自由液面隆起轮廓基本吻合,而压力分布更符合实际情况,从而证明了模型及分析方法的正确性。
- 流体力学 /
- 复边界元 /
- 入水冲击 /
- 楔形体 /
- 射流线性近似
Abstract: Thewaterentryproblemofthe2-D wedgewithaconstantspeedisnumericallyanalyzed basedonthevelocitypotentialtheory.Anewjetlinearapproximationmethodisincorporatedintothe complexvariableboundaryelementsolverthatdescribesthejetgeneratedbythewaterentryofwedgestonearlysimulatethefreesurfaceshape, jetandpressuredistributionalongthewettedareaofthe wedgecontour.AndthesametimeCauchyintegraltheoremisusedastheintegrationequation,and thesimilaritysolutionastheinitialcondition.Someimportantnumericaltechniquesarediscussedin detailsuchastimemarchingsolution,jettreatment,gridmeshgenerationandthefreesurfacedeformationupdating. Finally,thepressuredistributionandwaveelevationforthewedgeswithdifferentdeadriseanglesaregotten. Theproposedmethodisvalidatedthroughcomparisonswiththesimilaritysolutionandgoodapproximationsarefound.
- fluidmechanics /
- complexboundaryelementmethod /
- waterentryimpact\wedge /
- jetlinearapproximation /