Abstract
Heat transfer during compression and expansion is particularly important in closed-cycle machines such as Stirling engines and pulse-tube refrigerators. It is important to know the temperature profile near the wall by which the heat transmission is determined. The present work measured temperature profile near the wall with a thin (3.8μm diameter) resistance wire. Apparatus have a 39mm diameter, 28mm stroke piston and a 314cm^3 reserver. The compression ratio is 1.1. The piston is driven by D.C. motor to allow speed adjustment. The distance between the wall and the sensor has been adjusted by using the head that can be adjusted. Measurement was carried out for a range of pressure, frequency, and for several gases. Temperature profiles were correlated with a parameter. Phase advance to that of volume was observed.
