脉冲管整机条件下回热器交变特性实验研究

发布时间：2018-04-21 05:13

本文选题：回热器 + 交变流动　；参考：《低温工程》2017年01期

【摘要】：搭建脉冲管制冷机动态参数测试实验台,在脉冲管制冷机整机运行条件下对处于实际温度梯度的回热器进行了动态速度以及动态压力测试。为了测量回热器冷端的动态速度,研究针对低温侧的热线探针进行了低温条件下的标定。实验测量了充气压力3 MPa、运行频率40—60 Hz、冷端温度100 K工况下回热器的相位特性以及阻力特性,并得到了整机运行条件下回热器阻力系数经验公式。研究结果表明,随着频率的提升,回热器冷热端速度-压力相位差增大,相同雷诺数下的阻力系数增大;随着温度降低,相同雷诺数下的阻力系数增大,并且在低雷诺数下变化更加明显。该研究结果是在回热器实际工作条件下测量得到,能够为脉冲管制冷机中的回热器模拟计算以及回热器热力学分析提供必要的数据支持。
[Abstract]:The dynamic velocity and dynamic pressure of the regenerator in the actual temperature gradient were measured under the operation condition of the pulse tube refrigerator by setting up a test bench for the dynamic parameters of the pulse tube refrigerator. In order to measure the dynamic velocity of the cold end of the regenerator, the hot wire probe on the low temperature side was calibrated at low temperature. The phase characteristics and resistance characteristics of the regenerator under the condition of 3 MPa inflation pressure, 40-60 Hz operating frequency and 100K cold end temperature are measured experimentally. The empirical formula of the resistance coefficient of the regenerator under the operating condition is obtained. The results show that with the increase of frequency, the phase difference between velocity and pressure increases, the drag coefficient increases at the same Reynolds number, and the resistance coefficient increases at the same Reynolds number when the temperature decreases. And the change is more obvious at low Reynolds number. The results are measured under the actual working conditions of the regenerator and can provide necessary data support for the simulation calculation of the regenerator in the pulse tube refrigerator and the thermodynamic analysis of the regenerator.
【作者单位】：中国科学院理化技术研究所空间功热转换重点实验室;中国科学院大学;
【基金】：国家重点基础研究发展计划(613322) 国家自然科学基金青年基金(51306196)
【分类号】：TB651

【相似文献】