摘要: |
面向非定常湍流数值模拟方法精度提升问题,构建了实用的矢通量分裂(FVS)形式高阶精度混合格式。该格式平滑区具有五阶精度线性紧致格式的高分辨率特证,而强间断和强梯度区呈二阶耗散型格式特征,进而保证全流场计算的稳定性。基于所建立的混合格式开展有限体积大涡模拟(LES)计算,将其应用于三维高Reynolds数非定常湍流预测中。结果显示,所建立的数值格式能够可靠预测湍流多尺度涡结构特征,且计算量小,具有较高分辨率和鲁棒性。 |
关键词: 多尺度流动 大涡模拟 数值模拟 高阶格式中图分类号:V211.3文献标识码:A文章编号:1001-4055(2015)12-1774-07DOI:10.13675/j.cnki.tjjs.2015.12.003 |
DOI: |
分类号:V211.3 |
基金项目:国家自然基金(1102199;11402254) |
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ANewNumericalSchemeandItsApplicationinMulti-ScaleFlow |
PANHong-lu,LIJun-hong,SHENQing
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(ChinaAcademyofAerospaceAerodynamics,Beijing100074,China)
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Abstract: |
Amixedschemeoffluxvectorsplitting(FVS)wasconstructedtoincreaseprecisionofthesimulationmethodonturbulencecomplexmulti-scaleflows.Theschemeisofhighorderresolutioncharacteris.ticssimilarto5thordercompactschemeinsmoothregion,with2ndorderprecisioninlocaldiscontinueandstronggradientregiontostabilizetheflowfieldsimulation.Thepresentmethodwasappliedtofinitevolumelargeeddysimulation(LES),andthestudyonthreedimensional(3D)highReynoldsnumberunsteadyflowswascarriedout.Theresultsrevealthatthepresentschemeconstructedhereisofhighresolutionandrobustnesswithlowcomputationalcostandisabletopredictcomplexmulti-scaleflowsvortexreliably. |
Key words: Multi-scaleflow Largeeddysimulation Numericalsimulation Highorderscheme |