| 脉管制冷机中复杂DC流的影响机理 |
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| 引用本文： | 刘迎文,何雅玲.脉管制冷机中复杂DC流的影响机理[J].工程热物理学报,2010,31(1). |
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| 作者姓名： | 刘迎文 何雅玲 |
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| 作者单位： | 西安交通大学能源与动力工程学院,动力工程多相流国家重点实验室,陕西,西安,710049 |
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| 基金项目： | 国家自然科学基金资助项目(No.50706036;No.50736005) |
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| 摘 要： | 为了进一步研究系统非对称性对DC流现象和脉管制冷机中直流分量对制冷性能的影响,采用数值模拟方法,引入了描述系统阻力元件的非对称性的几何参数—不对称率,详细研究了系统不对称性对脉管制冷机DC流、制冷性能的影响规律,并且在分析和比较不同流向和幅值大小的条件下,详细研究了DC流的流向和幅值对脉管制冷机的关键部件脉管和回热器的壁面温度分布特性的影响规律。数值验证了将壁面温度分布作为描述脉管制冷机中DC流的流动方向和大小的判定准则的正确性,且回热器和脉管的壁面温度分布的非线性越强烈,预示着系统内DC流的流向和幅值越大,对制冷性能的影响越剧烈,并间接指出系统热力不对称性是造成DC流的主要原因,为进一步发现和抑制直流现象提供了可靠的理论依据。
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| 关 键 词： | 脉管制冷机 DC流 非对称性 数值模拟 |
ACTING MECHANISM OF THE COMPLEX DC-FLOW IN THE PULSE TUBE REFRIGERATOR |
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| LIU Ying-Wen,HE Ya-Ling.ACTING MECHANISM OF THE COMPLEX DC-FLOW IN THE PULSE TUBE REFRIGERATOR[J].Journal of Engineering Thermophysics,2010,31(1). |
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| Authors: | LIU Ying-Wen HE Ya-Ling |
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| Institution: | State Key Laboratory of Multiphase Flow in Power Engineering;School of Energy & Power Engineering;Xi'an Jiaotong University;Xi'an 710049;China |
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| Abstract: | In order to further explore the influence of the unsymmetrical characteristic of a pulse tube refrigerator on DC-Flow phenomena and the influence of the DC-Flow mass rate on cooling capacity, a numerical simulation method is carried out.A geometrical parameter,asymmetry ratio that acts as the token of the unsymmetrical characteristic of the pulse tube refrigerator,is brought forward.The influence of the unsymmetrical characteristic of the DC-flow and the cooling performance of the pulse tube refrigerator ar... |
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| Keywords: | pulse tube refrigerator DC-Flow unsymmetrical characteristic numerical simulation |
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