Abstract:
The time response of a wind tunnel pressure measuring system,
comprising a pressure transducer of fixed volume and a length of
capillary tubing, is analysed and the results compared with experiments.
It is shown that the approximate analysis of Kendall (1958), in which
the friction losses at any given time are assumed equal to the steady
state losses, has a wide range of validity, provided the L/R ratio for
the capillary tube is large and the inlet and exit losses are included
as equivalent lengths of the capillary tube.
