Abstract
Optimum conditions, which are for the lowest value of minimum cold end temperatures, are investigated by changing the frequency and the opening of the orifice and double inlet valves. Moreover, oscillations of velocity are obtained directly by using a hot-wire anemometer and the P-V work in the pulse tube is estimated. The velocity oscillation under the optimum conditions and the effects of valve opening on the P-V work are discussed. It is found that for the orifice configuration the P-V work increases with increasing valve opening and reaches a maximum value at a valve opening larger than that for the optimum condition. For the double inlet configuration the dependency of the P-V work on the valve opening is negligibly small except in the range of very small opening. It is suggested from the results of P-V work that the losses in the pulse tube have significant effects in the range of large valve opening.
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Shiraishi, M., Seo, K., Nakamura, N., Murakami, M. (1998). Oscillating Flow Behavior in a Pulse Tube Refrigerator under Optimized Conditions. In: Kittel, P. (eds) Advances in Cryogenic Engineering. Advances in Cryogenic Engineering, vol 43. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9047-4_254
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DOI: https://doi.org/10.1007/978-1-4757-9047-4_254
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