Visualization of oscillating flow in a double-inlet pulse tube refrigerator with a diaphragm inserted in a bypass-tube |
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| Authors: | Masao Shiraishi Masahide Murakami |
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| Affiliation: | 1. HiSIM Center, Hiroshima University, Kagamiyama 1-3-1, Higashihiroshima, Hiroshima 739-8530, Japan;2. Institute of Engineering Mechanics and Systems, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan;2. Department of Animal Science, Shandong Agricultural University, Taian, Shandong 271018, P. R. China;1. Laboratory for Mechanical Metallurgy, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland;2. Technical University of Catalonia, Barcelona, Spain;3. ETEL SA, Môtiers, Switzerland;1. Laboratorio de Ecología Microbiana, Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas Físico Químicas y Naturales. Universidad Nacional de Río Cuarto, Río Cuarto, Córdoba, Argentina;2. Members of the Research Career, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina |
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| Abstract: | The double-inlet pulse tube refrigerator that has a diaphragm inserted in a bypass-tube, which enabled it to transmit a pressure oscillation whereas to obstruct a DC gas flow, was manufactured and tested. The oscillating flow behavior inside of the refrigerator was studied by using a smoke-wire flow visualization technique. It was found that if the diaphragm was optimized, the performance would be improved more than that of the refrigerator with a bypass valve due to the increase in the P–V work of the gas and the decrease in the convective heat loss caused by a secondary flow. |
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