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Measurements of phase shifts in an inertance tube



Michael A. Lewis, Peter E. Bradley, Ray Radebaugh, Ercang Lou


Phase shifts and mass flows were measured at the inlet of an inertance tube. and the results are compared with transmission line models. The mass flow rates at the entrance to the inertance tube are obtained using a hot-wire anemometer. The hot wire was calibrated in oscillating flow conditions by mass flow rate comparisons at two other locations in the apparatus. Measurements were made and future work will attempt to show that with adjusting the diameters and lengths of the inertance tubes as well as operating conditions, we will be able to separate the effects of resistive. inertance. and compliance components. We discuss the hot wire calibration procedure used to ensure self-consistency among the various transducers and system mass flowrate measurement calculations. The magnitude and phase of the inertance tube complex impedance are measured and discussed. The size of the inertance tube studied here was 1.5mm diameter by 1.15 m long with frequencies between 30 and 70 Hz.
Proceedings Title
Proc. Intl. Cryocooler Conf.
Conference Dates
March 29-April 1, 2004
Conference Location
New Orleans, LA, USA
Conference Title
Intl. Cryocooler Conf.


compressor, hot wire anemometer, impedance, inertance tube, mass flowrate, oscillating flow, phase shift, pressure ratio


Lewis, M. , Bradley, P. , Radebaugh, R. and Lou, E. (2005), Measurements of phase shifts in an inertance tube, Proc. Intl. Cryocooler Conf. , New Orleans, LA, USA, [online], (Accessed June 12, 2024)


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Created December 31, 2004, Updated October 12, 2021