Two-dimensional model for tapered pulse tubes. Part 1: theoretical modeling and net enthalpy flow

✍ Scribed by Sang Ho Baek; Eun Soo Jeong; Sangkwon Jeong

• Book ID: 104112114
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 283 KB
• Volume: 40
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(00)00057-6

✦ Synopsis

A two-dimensional model for the tapered pulse tube was proposed. Linearized conservation equations of mass, momentum and energy of the gas as well as the energy conservation equation of the tube wall were applied to the pulse tube. The mean temperature pro®le of the gas and the tube wall was obtained by assuming that the outer surface of the pulse tube wall is adiabatic. Axial pro®le of the mean temperature is linear when the dimensionless frequency is small, but it deviates signi®cantly from linear pro®le when the dimensionless frequency is large. The eects of operating frequency, taper angle, displacement volume ratio and velocity phase angle between the ends of the pulse tube on net energy ¯ow as well as the eect of the taper angle on the ®rst-order axial velocity and temperature were shown.