LIU Yin-ze1, ZHANG Sheng-bao1, DONG Wei1,2, LIU Zhen-yu1, YU Xiao2.Analysis of Flow and Heat Transfer Performance of Primary Surface Heat Exchanger for Aeroengine[J].航空发动机,2017,43(4):61-68 |
Analysis of Flow and Heat Transfer Performance of Primary Surface Heat Exchanger for Aeroengine |
DOI: |
Key Words:primary surface heat exchanger flow and heat transfer numerical simulation counter flow cross flow aeroengine |
Author Name | Affiliation | E-mail | LIU Yin-ze1, ZHANG Sheng-bao1, DONG Wei1,2, LIU Zhen-yu1, YU Xiao2 | 1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2. AECC Shenyang Engine Research Institute, Shenyang 110015, China | sweepeeyz@126.com |
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Abstract:In order to investigate the performance of Primary Surface Heat Exchanger(PSHE)for aeroengine, the thermal calculations
of PSHE based on the number of heat transfer unit method and the structure characteristics of the heat exchanger were carried out. This
paper focused on four different structural models of the PSHE (straight channel heat exchanger and cross flow heat exchanger of 15°, 30°
and 45°). Numerical simulations were carried out in the real condition of an aeroengine to analysis the flow and heat transfer characteristics
of the PSHE. The design and calculation method of the PSHE core can be optimized by comparing the flow and heat transfer characteristics
of heat exchangers with different structures under different working conditions. The contrastive analysis of the influence of different
interleaving angle θon the heat transfer performance and fluid characteristics of heat exchanger were carried out based on numerical
calculation results. The results show that the temperature distribution in the whole heat exchanger is uniform for the straight channel heat
exchanger. For the cross flow heat exchanger, due to the corrugated plates are placed with cross angle alternately, the internal flow patterns
are complex. There were obvious eddies in some areas, the internal velocity and temperature distribution of the PSHE is extremely uneven.
With the increasing of cross angle, the heat transfer performance of the heat exchanger is continuously enhanced, but the pressure drop on
both sides increases greatly. |
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