Turbine flowmeter in-situ calibration method applied to test site
A turbine flowmeter, in-situ calibration technology, applied in the direction of volume/mass flow, test/calibration device, liquid/fluid solid measurement caused by mechanical effects, etc., can solve the deviation of flowmeter calibration method and affect the accuracy of test data and other problems to achieve the effect of saving financial resources and improving the accuracy of flow measurement
Active Publication Date: 2019-05-21
XIAN AEROSPACE PROPULSION TESTING TECHN INST
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[0043] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.
[0044] In order to improve the measurement accuracy of engine performance parameters, an in-situ calibration system for kerosene flow with the mass flowmeter as the calibration reference was established in the engine test site environment, and the turbine flowmeter was calibrated with real media, which improved the measurement accuracy of kerosene flow.
[0045] The output value of the mass flowmeter is mass flow, and its flow measurement can be approximately considered not to be affected by the physical parameters of the measured medium and the flow state in the pipe. In addition, it has high precision and is suitable for calibration of normal temperature turbine flowmeters. Through the real medium discharge, the mass flowmeter is used to calibrate multiple turbine flowmeters installed on the conventional propellant supply pipel...
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The invention relates to a turbine flowmeter in-situ calibration method applied to a test site, and solves the problems that an existing flowmeter calibration method has deviation, and the accuracy oftest data is seriously influenced. The turbine flowmeter in-situ calibration method comprises the following steps that 1, establishing a calibration system; 2, converting output signals of the mass flow meter; 3, calculating a measurement channel slope k of the mass flow meter; 4, determining a liquid discharge test calibration point; 5, carrying out a liquid discharge test; 6, processing on-siteliquid drainage data; 7, removing abnormal points; 8, performing six-gear liquid discharge test for three times; 9, calculating the field in-situ calibration coefficient of the turbine flowmeter; 10,calculating the measurement uncertainty of the maximum range of the mass flow meter, wherein the measurement uncertainty of the maximum range of the mass flow meter is shown in the specification; and11, calculating the measurement uncertainty uq of the mass flow meter, so that the calibration of the turbine flowmeter is completed.
Description
technical field [0001] The invention relates to a calibration method of a turbine flowmeter, in particular to an in-situ calibration method of a turbine flowmeter applied to a test site. Background technique [0002] In the liquid rocket engine test, the flow rate is a key parameter that must be accurately measured, and it is closely related to the specific impulse, mixing ratio and other performance parameters of the engine. In order to obtain the flow data of the whole process of the engine test and improve the reliability of the test data at the same time, it is generally used to measure the flow by installing multiple flowmeters in series. Before the flowmeter is used, it is necessary to perform water medium calibration in the laboratory. However, in the actual use process, there are certain differences between the laboratory calibration environment and pipeline installation and the actual use environment. In addition, the density of the calibration medium and the test m...
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IPC IPC(8): G01F1/32G01F25/00
Inventor 雷震张志涛郭立雷鸣刘正霍涛徐睿王小丽付琳琳李怡吴锦凤郑小萍李建军
Owner XIAN AEROSPACE PROPULSION TESTING TECHN INST