高旋转数下带肋回转通道的换热特性

发布时间：2018-05-21 15:10

本文选题：雷诺数 + 高旋转数　；参考：《航空动力学报》2016年02期

【摘要】：为匹配真实发动机转子叶片的工作条件,将实验回转通道气体压力提高到500kPa以上,使雷诺数和旋转数范围分别扩展到10 000~70 000和0~2.08.在此基础上通过实验方法研究了高旋转数下带45°倾角斜肋的方形截面回转通道的换热特性.结果表明:回转通道的第1通道前缘面传热系数随旋转数的增大先减小,在达到临界旋转数后换热随旋转数增大而增强;低旋转数下,回转通道的第2通道前后缘面换热差异较小,随着旋转数的增大,前缘面换热始终强于后缘面,这种换热特性与光滑通道完全不同.
[Abstract]:In order to match the operating conditions of the real engine rotor blade, the gas pressure of the experimental rotary channel is increased to above 500kPa, and the range of Reynolds number and rotation number is extended to 10 000 t 70000 and 0 0 0 2. 08 respectively. On the basis of this, the heat transfer characteristics of a square cross-section rotary channel with 45 掳inclined rib at high rotation number are studied by experimental method. The results show that the heat transfer coefficient of the front surface of the first channel decreases first with the increase of the number of rotations, and increases with the increase of the number of rotations when the critical number of rotation is reached, and the heat transfer increases with the increase of the number of rotations at low rotation number. The difference of heat transfer between the front and back sides of the second channel is small. With the increase of the rotation number, the heat transfer of the front edge is always stronger than that of the rear edge, which is completely different from that of the smooth channel.
【作者单位】：中国航空工业集团公司中航商用航空发动机有限责任公司设计研发中心;北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室;
【分类号】：V231.1

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