Numerical study on non-uniform heat transfer deterioration of supercritical RP-3 aviation kerosene in a horizontal tube

doi:10.1016/j.cjche.2020.03.037

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (6): 1542-1557.DOI: 10.1016/j.cjche.2020.03.037

• Fluid Dynamics and Transport Phenomena • 上一篇下一篇

Numerical study on non-uniform heat transfer deterioration of supercritical RP-3 aviation kerosene in a horizontal tube

Yanhong Wang¹, Yingnan Lu¹, Sufen Li², Ming Dong²

1 School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, China;
2 School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China

收稿日期:2019-12-06 修回日期:2020-03-28 出版日期:2020-06-28 发布日期:2020-07-29
通讯作者: Yanhong Wang
基金资助:
The authors would like to express their thanks for the support from the National Natural Science Foundation of China (No. 51576027).

Numerical study on non-uniform heat transfer deterioration of supercritical RP-3 aviation kerosene in a horizontal tube

Yanhong Wang¹, Yingnan Lu¹, Sufen Li², Ming Dong²

1 School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, China;
2 School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China

Received:2019-12-06 Revised:2020-03-28 Online:2020-06-28 Published:2020-07-29
Contact: Yanhong Wang
Supported by:
The authors would like to express their thanks for the support from the National Natural Science Foundation of China (No. 51576027).

摘要/Abstract

摘要： The convective heat transfer of supercritical-pressure RP-3 (Rocket Propellant 3) aviation kerosene in a horizontal circular tube has been numerically studied, focusing mainly on the non-uniform heat transfer deterioration along the circumferential direction. The governing equations of mass, momentum and energy have been solved using the pressure-based segregated solver based on the finite volume method. The re-normalization group (RNG) k-ε turbulence model with an enhanced wall treatment was selected. Considering the heat conduction in the solid wall, the mechanism of heat transfer deterioration and the buoyancy effect on deteriorated heat transfer were discussed. The evolution of secondary flow was analyzed. Effects of the outer-wall heat flux, mass flux, pressure and tube thermal conductivity on heat transfer were investigated. Moreover, the buoyancy criterion and the heat transfer correlation were obtained. Results indicate that the poor flow performance of near-wall fluid causes the pseudo-film boiling, further leads to the heat transfer deterioration. The strong buoyancy has an effect of enhancing the heat transfer at the bottom of tube, and weakening the heat transfer at the top of tube, which results in the non-uniform inner-wall temperature and heat flux distributions. Decreasing the ratio of outer-wall heat flux and mass flux, increasing the pressure could weaken the heat transfer difference along the circumferential direction, while the effect of thermal conductivity of tube on the circumferential parameters distributions is more complicated. When the buoyancy criterion of (Gr_q/Gr_th)_max ≤ 0.8 is satisfied, the effect of buoyancy could be ignored. The new correlations work well for non-uniform heat transfer predictions.

关键词: Supercritical pressure, Aviation kerosene, Non-uniform heat transfer, Heat transfer deterioration, Buoyancy, Prediction correlation

Abstract: The convective heat transfer of supercritical-pressure RP-3 (Rocket Propellant 3) aviation kerosene in a horizontal circular tube has been numerically studied, focusing mainly on the non-uniform heat transfer deterioration along the circumferential direction. The governing equations of mass, momentum and energy have been solved using the pressure-based segregated solver based on the finite volume method. The re-normalization group (RNG) k-ε turbulence model with an enhanced wall treatment was selected. Considering the heat conduction in the solid wall, the mechanism of heat transfer deterioration and the buoyancy effect on deteriorated heat transfer were discussed. The evolution of secondary flow was analyzed. Effects of the outer-wall heat flux, mass flux, pressure and tube thermal conductivity on heat transfer were investigated. Moreover, the buoyancy criterion and the heat transfer correlation were obtained. Results indicate that the poor flow performance of near-wall fluid causes the pseudo-film boiling, further leads to the heat transfer deterioration. The strong buoyancy has an effect of enhancing the heat transfer at the bottom of tube, and weakening the heat transfer at the top of tube, which results in the non-uniform inner-wall temperature and heat flux distributions. Decreasing the ratio of outer-wall heat flux and mass flux, increasing the pressure could weaken the heat transfer difference along the circumferential direction, while the effect of thermal conductivity of tube on the circumferential parameters distributions is more complicated. When the buoyancy criterion of (Gr_q/Gr_th)_max ≤ 0.8 is satisfied, the effect of buoyancy could be ignored. The new correlations work well for non-uniform heat transfer predictions.

Key words: Supercritical pressure, Aviation kerosene, Non-uniform heat transfer, Heat transfer deterioration, Buoyancy, Prediction correlation

Yanhong Wang, Yingnan Lu, Sufen Li, Ming Dong. Numerical study on non-uniform heat transfer deterioration of supercritical RP-3 aviation kerosene in a horizontal tube[J]. 中国化学工程学报, 2020, 28(6): 1542-1557.

Yanhong Wang, Yingnan Lu, Sufen Li, Ming Dong. Numerical study on non-uniform heat transfer deterioration of supercritical RP-3 aviation kerosene in a horizontal tube[J]. Chinese Journal of Chemical Engineering, 2020, 28(6): 1542-1557.

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Numerical study on non-uniform heat transfer deterioration of supercritical RP-3 aviation kerosene in a horizontal tube

Numerical study on non-uniform heat transfer deterioration of supercritical RP-3 aviation kerosene in a horizontal tube

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