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射流孔排布對射流表面減阻性能的影響
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國家自然科學(xué)基金資助項目（51305399,、51275102）


Effect of Jet Hole Arrangement on Drag Reduction Characteristics of Jet Surface
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    摘要:

    基于單孔射流特性,，建立射流孔排布方式的計算模型,，利用SST kω湍流模型對射流表面不同射流孔排布情況下的減阻特性進(jìn)行數(shù)值模擬,，分析射流表面射流孔排布對壁面黏性阻力和減阻率的影響，得到最大減阻率為33.65%，并對數(shù)值計算模型進(jìn)行了實驗驗證。通過分析射流表面壁面邊界層剪應(yīng)力、壁面壓應(yīng)力,、流場速度及射流孔下游區(qū)域產(chǎn)生的漩渦運動特性及分布規(guī)律，得知射流表面射流孔排布能夠?qū)Ρ诿孢吔鐚舆M(jìn)行有效的控制,，并揭示了射流表面的減阻機(jī)理,。

    Abstract:

    A calculation model of jet hole arrangement ways was established based on the characteristics of single jet hole. With SST kω turbulence model, the drag reduction characteristics of jet surface under the condition of different jet hole arrangement was researched by using the numerical simulation. Then, the impact of jet hole arrangement on surface viscous resistance and drag reduction rate was analyzed, and the maximum drag reduction rate reached 33.65%, which was experimentally validated by using numerical calculation model. The movement characteristics and distribution rules of the shear stress of wall boundary layer, the surface compressive stress, the flow velocity and vortex generating in the downstream of the jet hole were studied. The results showed that wall boundary layer could be well controlled by jet hole arrangement of jet surface, and the drag reduction mechanism of jet surface was also revealed.

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谷云慶,牟介剛,鄭水華,趙剛,汝晶,王成剛.射流孔排布對射流表面減阻性能的影響[J].農(nóng)業(yè)機(jī)械學(xué)報,2014,45(10):340-346. Gu Yunqing, Mu Jiegang, Zheng Shuihua, Zhao Gang, Ru Jing, Wang Chenggang. Effect of Jet Hole Arrangement on Drag Reduction Characteristics of Jet Surface[J]. Transactions of the Chinese Society for Agricultural Machinery,2014,45(10):340-346.

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  • 收稿日期:2013-09-25
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  • 在線發(fā)布日期: 2014-10-10
  • 出版日期: 2014-10-10
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