A standard volute-type, radial-flow, centrifugal pump was instrumented to obtain the pressure distribution in the volute and also the bearing reactions from the pump hydraulic force transmitted to the shaft. The resultant force from the integrated pressure distribution was found to give a reasonable design approximation of the radial force. An analysis of hydraulic conditions within the volute gave pressure distributions and radial-force magnitudes that were comparable to those measured with certain qualitative interpretations about internal recirculations. In addition, the pressure-distribution analysis furnished an interpretation of the effect of the volute on the pump head-capacity performance with corrections to the impeller head. The predicted head-capacity relationship had the form of the measured pump performance.

A method for determining the sonic velocity in a fluid as a function of pressure and temperature is described. The method used measures the time required for an expansion wave to travel a known distance through the test medium. The results of the sonic velocity measurements are presented for normal hydrocarbons from C6 to C16 for temperatures and pressures from 60 to 250 F and 0 to 5000 psig, respectively. The density of the hydrocarbons was also determined. The absolute viscosity of the test compounds was determined by use of a rolling-ball viscometer for pressures from 0 to 6000 psig in the temperature range given. Tabulated and graphical results are presented for adiabatic bulk modulus, density, and absolute and kinematic viscosity for the range of hydrocarbons tested.

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