Experimental Data on Two-Phase Pressure Drops Across Area Changes During Flow Transients. Volume 1.

摘要

A series of blowdown-type experiments were conducted,using Freon 113as the test fluid,to obtain data on pressure drop across abrupt area changes during flow transients. A rapidly opening solenoid valve allowed Freon contained in a pressurized reservoir to be rapidly discharged across an orifice where flashing occurred. The two-phase mixture produced then flowed through an instrumented test section containing the abrupt area change. The fluid leaving the test section entered a second closed reservoir. Equalization of the pressures in the upstream and downstream reservoirs terminated the transient. Data obtained during the transient included flow rate out of the upstream reservoir,void fraction at the inlet and outlet of the test section,absolute pressure,pressure drops at several locations along the piping and in the vicinity of the area change,and the total quantity of fluid discharged. In some runs, a turbine meter and drag disk were present at the inlet of the test section. These data are presented in this report as a series of curves for each run. In addition,magnetic tapes with the digitized data in engineering units are available and their contents are described in the Appendix. Volume 1considers the overall program,and the expansion tests.