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The output from these sensors was fed through an analog-to-digital system, Aerojet's Automatic Data Control System. Each parameter or channel is "swept" 30 times per second and the data is recorded on magnetic tapes. Three- second time sweeps were used during steady-state testing, while continuous sweeps were utilized during transient operation. The steady-state data for each function were averaged and statistically analyzed over the 3-second time interval. This statistical analysis of each function included the standard deviation and the maximum difference from the mean. Then the data were examined and considered to be acceptable if the two-sigma deviation was less than 1% of the mean. The above described average values were computed using Job No. 3001. The output from this computer program, which has identical printed and punch card output, was then used as input to a data reduction program. The test data were utilized in this data reduction program to produce normalized pump performance. Visual gage and strip charts were used to record critical or "redline" parameters, as well as aids in the setup of a test. The strip charts also provided "quick-look" information and served as backup for the digital recordings. High frequency data was recorded for the purpose of determining pressure oscillation during cavitation and transient conditions. These sensors were flush mounted at the pump suction and discharge. The output was recorded on magnetic tape which served as input to a spectral density computer program (Job No. 2901). B. TEST FLOW FACILITY Figure 29 shows a flow schematic of the test loop and the relative position of the necessary components. The hydrostatic bearing flow was supplied by a facility pump and was directly coupled to the loop so that there was no net gain or loss in fluid. Figure 30 is a photo of the test bay showing the associated valves and piping. C. TEST NUMBER AND TEST TYPE Table II shows the test number and type of test for the two test series. Also shown are the speed and flow range for each test as well as the type of components tested. Vll. TEST RESULTS AND PERFORMANCE EVALUATION All the test results discussed in this section were obtained from water-loop testing, which was completed in two test series. The three basic type of tests conducted were non-cavitating steady-state, cavitating steady-state, and cavitating transient. 43PDF Image | HUBLESS INDUCER FLOW HYDRAULIC TURBINE INDUCER BOOST PUMP
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