Accession Number : AD0695400

Title :   A NEW DIMENSION IN HYDRAULIC MACHINERY TESTING WITH THE QUARTZ CRYSTAL THERMOMETER.

Descriptive Note : Technical rept.,

Corporate Author : STANFORD UNIV CALIF DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : London,A. L. ; Nelson,D. V.

Report Date : AUG 1969

Pagination or Media Count : 57

Abstract : The development of the quartz crystal thermometer with high sensitivity and good stability has added a new dimension to the test evaluation of hydraulic machinery performance. Hydraulic losses appear as a heating effect in the fluid, and these small temperature increases can be detected with uncertainties of the order of 1 ft of head loss. The report presents the theory used in the hydrothermal method of testing and demonstrates its application in a particular pump test. The techniques used to properly average fluid temperature at a flow cross-section are described. The values of pump efficiency established by the conventional hydromechanical tests and those established by the hydrothermal measurements for eight tests had an average difference of 0.8 percentage points. This difference is well within experimental uncertainty. (Author)

Descriptors :   (*HYDRAULIC PRESSURE PUMPS, THERMAL ANALYSIS), (*THERMOMETERS, QUARTZ), EFFICIENCY, HEATING, MEASUREMENT, SENSITIVITY, TEMPERATURE, MATHEMATICAL ANALYSIS

Subject Categories : Pumps, Filters, Pipes, Tubing, Fittings & Vlvs
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE