Numerical investigation on the effect of the incident angle on momentum and heat transfer of spheroids in supercritical water
Numerical investigation on the effect of the incident angle on momentum and heat transfer of spheroids in supercritical water
复制标题
超临界水中入射角对球体动量和传热影响的数值研究
DOI:
10.1016/j.compfluid.2018.11.026
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发表时间:
2019-01
影响因子:
2.8
通讯作者:
Guangchao Wei
中科院分区:
文献类型:
--
作者:
Hao Zhang;Bo Xiong;Xizhong An;Chunhai Ke;Guangchao Wei
This paper studies the effect of the incident angle (θ) on momentum and heat transfer of spheroids in supercritical water (SCW) based on numerical simulations. Both prolate and oblate spheroids are considered with the aspect ratio (Ar) ranging from0.5to2.5. Numerical results show that both the drag coefficient (Cd) and average Nusselt number (Nu) of the oblate spheroid (Ar < 1) in SCW decrease with the increase ofθ. Opposite trend is found for the prolate spheroid (Ar > 1). Whenθ ≤ 45°, bothCdandNuof the two kinds of spheroids decrease with the increase ofAr. Whenθ > 45°, bothCdandNuof the prolate spheroid increases withAr. Nuof the oblate spheroid also increases withArbut itsCdis dependent on the competition of friction and pressure. The effect ofθonNucan be enhanced by either liftingReor ∣Ar-1∣. At last, the effect ofθis directly considered in the correlations ofCdandNufor spheroids in SCW which can improve the accuracy of the multi-phase flow modellings of SCW.
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