|Table of Contents|

Analysis on influence of gas entrapment of test system on centrifugal pump performance measuring(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2018年06期
Page:
75-80
Research Field:
测控与试验
Publishing date:

Info

Title:
Analysis on influence of gas entrapment of test system on centrifugal pump performance measuring
Author(s):
LIU Chengsheng;  WANG Xiaofeng;  ZHAO Yanli;  ZHANG Kai
Xi'an Aerospace Propulsion Institute, Xi'an 710100, China
Keywords:
test system;  gas entrapment;  performance measurement;  delivery head
PACS:
V431-34
DOI:
-
Abstract:
Since there is a damage caused by gas entrapment of test system, it is necessary to study the influence of gas entrapment of the test system on the centrifugal pump performance measurement.The influence factors of the theoretical formula of delivery head, efficiency, power and NPSH on the performance of centrifugal pump were analyzed in this paper.According to the theoretical formula and density and flow rate changes caused by gas entrapment of the test system, the influences of gas entrapment on the measurement of centrifugal pump performance were analyzed.In the case of gas entrapment of the test system, the measured different results were analyzed when the flow meter is located between the pump and regulating valve or after regulating valve at pump outlet.The results show that the gas entrapment of the test system may result in increase of delivery head, efficiency and NPSH, but decrease of centrifugal pump power.The results measured while executing gas entrapment are close to the results before executing gas entrapment when flow meter is located between the centrifugal pump and the regulating valve.When flow meter is located after the regulating valve, the results measured of delivery head, efficiency are higher than those before executing gas entrapment.Because of the influence of the flow meter position on measuring result, flow meter should be located between centrifugal pump and regulating valve so far as possible in design of the test system.

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Last Update: 2018-12-25