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基于CFD方法的低雷诺数下NACA4412翼型升、阻力系数图谱 被引量:4
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作者 陈哲 郭子伟 +2 位作者 何炎平 孟龙 赵永生 《可再生能源》 CAS 北大核心 2018年第2期296-301,共6页
在浮式风力机模型试验中,采用重新设计模型叶片的方式满足模型尺寸下风力机空气动力性能相似。所选用翼型在低雷诺数条件下升、阻力系数的准确性是叶片优化设计过程中的关键。文章以NACA4412翼型为例,对比常用的翼型升、阻力系数计算方... 在浮式风力机模型试验中,采用重新设计模型叶片的方式满足模型尺寸下风力机空气动力性能相似。所选用翼型在低雷诺数条件下升、阻力系数的准确性是叶片优化设计过程中的关键。文章以NACA4412翼型为例,对比常用的翼型升、阻力系数计算方法,得出XFOIL软件计算快、准确度低,而基于Fluent的2D RANS方法准确度高、时间长的结论。考虑不同雷诺数、不同攻角下升、阻力系数计算工作量大,文章提出基于CFD方法的NACA4412翼型在低雷诺数下升、阻力系数图谱。利用图谱可以在短时间内得到准确度高的升、阻力系数,为基于NACA4412翼型的单翼型模型叶片优化设计提供技术资料。 展开更多
关键词 浮式风力机 模型试验 翼型 FLUENT 升阻力计算
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A hypersonic lift mechanism with decoupled lift and drag surfaces 被引量:7
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作者 XU YiZhe XU ZhiQi +3 位作者 LI ShaoGuang LI Juan BAI ChenYuan WU ZiNiu 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2013年第5期981-988,共8页
In the present study, we propose a novel lift mechanism for which the lifting surface produces only lift. This is achieved by mounting a two-dimensional shock-shock interaction generator below the lifting surface. The... In the present study, we propose a novel lift mechanism for which the lifting surface produces only lift. This is achieved by mounting a two-dimensional shock-shock interaction generator below the lifting surface. The shock-shock interaction theory in conjunction with a three dimensional correction and checked with computational fluid dynamics (CFD) is used to analyze the lift and drag forces as function of the geometrical parameters and inflow Mach number. Through this study, though limited to only inviscid flow, we conclude that it is possible to obtain a high lift to drag ratio by suitably arranging the shock interaction generator. 展开更多
关键词 lift mechanism shock-shock interaction lift-to-drag ratio
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