Numerical investigation on heat transfer in an annulus between independently rotating cylinders with turbulent axial flow
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摘要: 采用混合长度模型,用共轭数值计算的方法研究了具有轴向通流且内轴加热情况下的双旋转轴间的换热,得到了内轴、双轴间隙内的温度场,内轴外壁面的温度分布情况,内轴外壁面对流换热系数的分布情况,并与实验结果进行了比较,结果表明:经过修正的混合长度模型对具有轴向通流的双旋转轴间换热情况的计算是可行的.Abstract: Heat transfer in the air gap of two rotating cylinders was numerically studied, based on the mixing length turbulent model. Temperature field of annulus, temperature distributions and heat transfer coefficient distributions on inner cylinder surface were calculated and compared with experimental results. The results show that the mixing length turbulent model is applicable for the simulation of heat transfer in the annulus between independently rotating cylinders.
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Key words:
- aircraft engines /
- numerical computation /
- heat transfer /
- annulus /
- mixing length
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