AN ANALYTICAL AND EXPERIMENTAL INVESTI¬GATION OF THE STEADY-STATE FLOW IN SMALL BORE TUBING WITH REDUCED SIZE STRAIGHT-THROUGH FITTINGS CONNECTED AT THE TUBING EXTREMITIES

摘要

The results of this analysis present the effect of system geometry, such as, tube length, diameter, and fitting diameter, and pressure ratio on the steady-state rate of mass flow through a typical tube and fitting combination. The data indicate that reduced-size fittings and long line lengths serve as chokes on the rate of flow of air through the system. Predictions are made as to the optimum tube diameter once the fitting diameter and line length are determined. In addition, the data show that a system comprised of lines, fittings, and a sensing volume is not analogous to a simple volume-orifice combination.