The application provides a kind of gas injection type pressure accumulator flow state test device and test method.The test device is characterized by comprising: gas injection type pressure accumulator body (26),
storage tank (11), pressurization control
assembly (37), pressure accumulator inflation
assembly (38), filling
discharge assembly (39), circulating supply assembly (40),
gas supply assembly (41), measurement control assembly (42);The pressurization control assembly (37) provides different flow pressurized gas for the control of
storage tank (11), realizes the stable control of the pressure of
storage tank (11);The pressure accumulator inflation assembly (38) provides constant flow pressurized gas for gas injection type pressure accumulator body (26);The filling
discharge assembly (39) provides liquid filling and
discharge for storage tank (11) and gas injection type pressure accumulator body (26).The application can test the influence of liquid flow state change in conveying
pipe on the performance of gas injection type pressure accumulator, and can reliably verify the working performance of gas injection type pressure accumulator under liquid flow working condition.