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1 飞机平稳地降落在条码王国机场,一下飞机,就看见一个圆滚滚的老头在演讲,聪聪忍不住笑了起来,因为他的衣服像射击的靶子◎一样,一圈一圈的,风一吹,就像泛起了涟漪。 相似文献
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A numerical model to predict film torque of hydro-viscous clutch was developed.The model was established with computational fluid dynamics(CFD).The pressure distribution,velocity of flow and film torque were obtained based on vertical-horizontal grooved plate and radial grooved plate separately.The boundary conditions,such as the relative rotation,the fluid temperature and the oil feeding pressure,were also discussed.The results showed that the film torque of two kinds of grooved plate increased with increasing relative rotation.However,the film torque decreased with increasing fluid temperature and feeding pressure.Meanwhile,the film torque of radial grooved plate was less than vertical-horizontal grooved plate at the same condition.Our study showed that the model can efficiently calculate the film torque with complex geometry parameters and boundary conditions. 相似文献
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为了使液黏调速离合器摩擦副间隙尽可能地均匀分布,满足工作性能和散热要求。基于不可压缩流体控制方程和Shear Stress Transport(SST)湍流模型,建立了两种油道结构的三维流场模型,应用ANSYS CFX对润滑油道的流场进行数值模拟计算,研究了油道结构对摩擦副入口处油压和流速分布的影响。结果表明:润滑油道结构对摩擦副入口压力和流速影响比较明显,改进后的油道结构压力损失较小且喷油孔的油压和流速分布比较均匀,有助于摩擦片和对偶钢片间隙的均匀分布,能更好地满足液黏传递转矩和散热的要求。 相似文献
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聪聪得到魔法宝典后,如获至宝,整天拿着查这查那,忙的不亦乐乎!这不,今天一见Annie,就开始讲开了:“现在的食品问题是越来越严重了,主要是食品添加剂惹的祸。应该颁布一条法令,禁止在食品中添加任何食品添加剂,就像面粉中不再允许添加过氧化苯甲酰一样。” 相似文献