LIQUID-HYDROGEN-FLOWMETER CALIBRATION FACILITY; PRELIMINARY CALIBRATIONS ON SOME HEAD-TYPE AND TURBINE-TYPE FLOWMETERS
Abstract
Construction details, instrumentation, and operating techniques are described for a facility that will accept flowmeters up to 1.5-inch pipe size and that can maintain liquidhydrogen flow rates up to 1 pound per second for 3 minutes. The probable error of calibration is 1/4% of the flow rate for flow rates between 0.05 and 1 pound per second. Preliminary tests of an orifice plate and a nozzle indicate that the same correlation of discharge coefficient with Reynolds number applies for liquid hydrogen as for water. Preliminary tests of several commercially available turbine-type meters show that the calibration constant (pulses per unit volume) for liquid hydrogen will differ, on the average, about 1.0% from the value for water; the difference is not of the same sign for different meters. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1961
- Accession Number
- AD0265479
Entities
People
- Herbert L. Minkin
- Howard F. Hobart
Organizations
- National Aeronautics and Space Administration