A CFD method is used to investigate the three dimensional oscillating flow and heat transfer
in the pulse tube (PT) and heat exchangers (HEs) of a pulse tube refrigerator (PTR). Some …

Stirling-type pulse tube cryocoolers (SPTCs) have seen widespread deployment in high-
temperature superconductivity and hydrogen liquefaction applications. Aftercoolers are …

Pulse tube refrigerators have the unique feature of a hollow tube replacing the cold piston.
This paper analyzes some losses resulting from this hollow tube due to the oscillating flow; …

CFD models are used to study the performance of circular and annular pulse tubes working
at 77–300 K. The oscillating flow and heat transfer characteristics are investigated. In terms …

Unsteady components of the second-order axial velocity and temperature within a tapered
pulse tube were obtained by using a hybrid method of solution. In this method, the unsteady …

パルス管内流動の数値計算 Page 1 40 研 究 論 文 パルス管内流動の数値計算 穂 積 良 和, 村 上 正
秀*, 吉 澤 能 政* 千代田化工建設 (株) 横浜市神奈川区守屋町3-13 * 筑波大学 構造工学系 つくば市 …

As for pulse tube refrigerators, it is difficult to understand the phenomena in pulse tube
because gas in the pulse tube oscillates exchanging heat with wall. Therefore, it is …

The flow inside typical pulse tube refrigerators which are a basic, an orifice and a double
inlet type, has been observed by the visualization technique to investigate the effects of …

Temperature measurement in a pulse tube is important to understand the gas behavior in
particular. However, it has not been measured with few exceptions. In this paper, we …

We tried to observe the flow behavior in typical pulse tube refrigerators(ie, basic, orifice and
double-inlet pulse tube refrigerators) using a smoke-wire flow visualization technique, and …