TY - JOUR
T1 - Investigation of the effect of a bend in a transfer line that separates a pulse tube cold head and a pressure wave generator
AU - Dev, A. A.
AU - Atrey, M. D.
AU - Vanapalli, S.
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2017/3/1
Y1 - 2017/3/1
N2 - A transfer line between a pulse tube cold head and a pressure wave generator is usually required to isolate the cold head from the vibrations of the compressor. Although it is a common practice to use a thin and narrow straight tube, a bent tube would allow design flexibility and easy mounting of the cold head, such as in a split Stirling type pulse tube cryocooler. In this paper, we report a preliminary investigation on the effect of the bending of the tube on the flow transfer characteristics. A numerical study using commercial computational fluid dynamics model is performed to gain insight into the flow characteristics in the bent tube. Oscillating flow experiments are performed with a straight and a bent tube at a filling pressure of 15 bar and an operating frequency of 40, 50 and 60 Hz. The data and the corresponding numerical simulations point to the hypothesis that the secondary flow in the bent tube causes a decrease in flow at a fixed pressure amplitude.
AB - A transfer line between a pulse tube cold head and a pressure wave generator is usually required to isolate the cold head from the vibrations of the compressor. Although it is a common practice to use a thin and narrow straight tube, a bent tube would allow design flexibility and easy mounting of the cold head, such as in a split Stirling type pulse tube cryocooler. In this paper, we report a preliminary investigation on the effect of the bending of the tube on the flow transfer characteristics. A numerical study using commercial computational fluid dynamics model is performed to gain insight into the flow characteristics in the bent tube. Oscillating flow experiments are performed with a straight and a bent tube at a filling pressure of 15 bar and an operating frequency of 40, 50 and 60 Hz. The data and the corresponding numerical simulations point to the hypothesis that the secondary flow in the bent tube causes a decrease in flow at a fixed pressure amplitude.
UR - http://www.scopus.com/inward/record.url?scp=85016516873&partnerID=8YFLogxK
U2 - 10.1088/1757-899X/171/1/012065
DO - 10.1088/1757-899X/171/1/012065
M3 - Conference article
AN - SCOPUS:85016516873
SN - 1757-8981
VL - 171
JO - IOP Conference Series: Materials Science and Engineering
JF - IOP Conference Series: Materials Science and Engineering
IS - 1
M1 - 012065
T2 - 26th International Cryogenic Engineering Conference, ICEC 2016 and International Cryogenic Materials Conference 2016, ICMC 2016
Y2 - 7 March 2016 through 11 March 2016
ER -