TESTING METHOD AND TEST STAND FOR THE DETERMINATION OF THE CAVITATION CHARACTERISTICS OF PUMP

摘要

PURPOSE: A method and a device for testing the cavitation characteristic of a pump are provided to change the thermodynamic state of working fluid and not heating the whole fluid within a tank, thereby remarkably reducing the working load. CONSTITUTION: A flow valve(10) and an drain valve(26) control supply or discharge of a gas phase supply pipe line(32) of cryogenic liquid. A thermal heat exchanger(11) heats the cryogenic liquid and makes the gas phase. The gas phase flow rate, and pressure and temperature sensors(28,27/29,30) measure the temperature, pressure and flow rate of the gas phase. A gas phase supply pressure controller(13) for the gas phase supply controls the flow rate of the gas phase.