合成双射流结合不同金属-水的微米流体的强化换热研究
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国防科技大学

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O358;TK124

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结冰与防除冰重点实验室基金(IADL20220410);沈阳市飞机结冰与防除冰重点实验室基金(YL2022XFX03);国家自然科学基金资助项目(12472276);国家科技重大专项资助项目(J2019-III-0010-0054);


Enhanced heat transfer by combining dual synthetic jets actuator with different metal-water micron particle multiphase flow
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    摘要:

    为提高临近空间飞行器电子设备系统散热能力,解决集成化、微型化电子设备芯片高热流密度的问题,针对合成双射流激励器、微米颗粒两相流以及二者结合开展了换热性能的研究。对合成双射流激励器增强换热能力机理进行分析,并对合成双射流激励器与铜-水微米流体管内流动过程进行了建模,运用单欧拉模型模拟分析了五种颗粒浓度对流体强化换热能力的影响。最后还对铜-水、氧化铜-水、氧化铝-水微米流体进行数值模拟。结果显示:合成双射流激励器能增强流体换热能力;换热能力随微米颗粒浓度的增加而提高。不同金属颗粒种类的两相流换热能力不同,其随金属颗粒导热性能的变化而变化。合成双射流激励器开启、颗粒浓度为8%的铜粒子微米颗粒流体,芯片温度由328.225K降低至303.816K。

    Abstract:

    In order to improve the heat dissipation capacity of the electronic equipment system of the near space vehicle and solve the problem of high heat flux of integrated and miniaturized electronic devices,the paper had a study on the heat transfer performance of dual synthetic jets actuators, by making use of two-phase flow composed of micron-particle and water and their combination. The mechanism of enhancing heat transfer capacity with dual synthetic jets actuator is was studied and analyzed. The flow process of the dual synthetic jets actuator and Cu-water micron particle fluid in the tube is was modeled, and the influence of five particle concentrations on the enhanced heat transfer capacity of the fluid is was simulated by the single Euler model. CUO-water and Al2O3-water micron particle fluids are were simulated. The results show that the heat transfer capacity of fluid can be enhanced by the dual synthetic jets. The heat transfer capacity in-creases with the increase of micron particle concentration. The two-phase flow heat transfer capacity of different metal particles varies with the thermal conductivity of metal particles. In the example, a microparticle fluid of Cu particles with a dual synthetic jets actuator on and a particle concentration of 8% is synthesized, and the chip temperature is reduced from 328.225K to 303.816K.

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  • 收稿日期:2024-09-12
  • 最后修改日期:2025-07-20
  • 录用日期:2025-01-15
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