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首页> 外文期刊>Journal of Heat Transfer >Simulation of Laminar Slot Jets Impinging on a Moving Surface
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Simulation of Laminar Slot Jets Impinging on a Moving Surface

机译:层流缝隙射流撞击运动表面的模拟

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摘要

Laminar flow and heat transfer on a moving surface due to a bank of impinging slot jets have been numerically investigated. Two types of jet, namely axial and knife-jet with an exit angle of 60 deg were considered. The surface velocity up to two times the jet velocity at the nozzle exit was imposed on the impinging surface. It has been observed that while with increasing velocity of the impinging surface, the total heat transfer reduces; the distribution pattern becomes more uniform. For the same amount of mass and momentum flux at the nozzle exit, heat transfer from the axial jet is considerably higher than that from the vectored jets at all surface velocities considered. It was found that the local heat transfer over the surface for the case of the axial jet and the knife-jet scales with Re~(0.5) and Re~(0.55), respectively.
机译:由于一排撞击的狭缝射流,在运动表面上的层流和传热已经进行了数值研究。考虑了两种类型的射流,即轴向射流和刀形射流,其出射角为60度。施加在撞击表面上的表面速度是喷嘴出口处射流速度的两倍。已经观察到,虽然随着撞击表面的速度增加,总的热传递减少;但是,随着热的增加,总的热传递减小。分布模式变得更加均匀。对于在喷嘴出口处相同数量的质量和动量通量,在所考虑的所有表面速度下,轴向射流的传热要比矢量射流的传热高得多。结果表明,轴向射流和刀射​​射流氧化皮在表面上的局部传热分别为Re〜(0.5)和Re〜(0.55)。

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