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A liquid flow test method for cavitation pipe

A test method and cavitation technology, applied in fluid dynamics test, machine/structural component test, instrument, etc., can solve problems such as high complexity of cavitation pipe liquid flow test system

Active Publication Date: 2021-09-28
BEIJING XINGJI RONGYAO SPACE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the high complexity of the existing cavitation pipe liquid flow test system, thereby providing a cavitation pipe liquid flow test method

Method used

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  • A liquid flow test method for cavitation pipe
  • A liquid flow test method for cavitation pipe
  • A liquid flow test method for cavitation pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Such as figure 2 As shown, the present embodiment provides a cavitation pipe liquid flow test method, comprising the following steps:

[0051] S1. Adjust the inlet pressure and outlet pressure of the cavitation pipe so that the inlet pressure value is the same as the preset initial inlet pressure value, the outlet pressure value is the same as the preset initial outlet pressure value, and the preset initial outlet pressure value is the preset value. Set 40%-50% of the initial inlet pressure value, and measure the liquid temperature and flow at the inlet of the cavitation pipe;

[0052] S2. Increase the outlet pressure of the cavitation pipe, and measure the outlet pressure value, inlet pressure value, liquid flow rate and liquid temperature, so that the outlet pressure value is less than the preset initial inlet pressure value;

[0053] S3. Repeat step (2) until the outlet pressure value is equal to 90%-95% of the preset initial inlet pressure value;

[0054] S4. Cal...

Embodiment 2

[0089] Such as Figure 4 As shown, the present embodiment provides a cavitation pipe liquid flow test method, comprising the following steps:

[0090] S1. Adjust the inlet pressure and outlet pressure of the cavitation pipe so that the inlet pressure value is the same as the preset initial inlet pressure value, the outlet pressure value is the same as the preset initial outlet pressure value, and the preset initial outlet pressure value is the preset value. Set 90%-95% of the initial inlet pressure value, and measure the liquid temperature and flow at the inlet of the cavitation pipe;

[0091] S2. Reduce the outlet pressure of the cavitation pipe, and measure the outlet pressure value, inlet pressure value, liquid flow rate and liquid temperature;

[0092] S3. Repeat step (2) until the outlet pressure value is equal to 45%-50% of the preset initial inlet pressure value;

[0093] S4. Calculate several sets of inlet pressure values, outlet pressure values, liquid flow rates an...

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Abstract

The invention provides a test method for cavitation pipe liquid flow. Firstly, the inlet pressure and outlet pressure of the cavitation pipe are adjusted to be the same as the preset initial inlet pressure value and the preset initial outlet pressure value respectively, and the liquid at the inlet of the cavitation pipe is measured. Temperature and flow rate; then adjust the outlet pressure of the cavitation tube successively, and measure the outlet pressure value, inlet pressure value, liquid flow rate and liquid temperature; calculate several sets of data obtained in the above steps to obtain the corresponding flow coefficient and pressure loss Coefficient; several groups of flow coefficients and pressure loss coefficients are analyzed to obtain the flow coefficient and pressure loss coefficient of the cavitation tube in the critical cavitation state. Since the inlet pressure of the cavitation tube does not need to be strictly limited during the test, it is not necessary to equip intelligent automatic adjustment equipment to ensure the normal progress of the liquid flow test, thereby reducing the complexity of the test system and reducing the cost of the test system. cost.

Description

technical field [0001] The invention relates to the technical field of liquid rockets, in particular to a cavitation tube liquid flow test method. Background technique [0002] The dimensional tolerances and assembly tolerances of various components in the liquid rocket engine will cause deviations in parameters such as turbine efficiency, pump characteristics, gas-liquid flow path and pressure drop of the engine nozzle, resulting in the dispersion of engine performance parameters. In order to solve the above problems, adjustment elements such as cavitation tubes are usually installed in the engine pipeline, and the propellant flow rate of the engine is adjusted by changing the throat size of the cavitation tube, so as to achieve the purpose of adjusting the thrust and mixing ratio. [0003] Before the cavitation pipe is selected, it is necessary to conduct a liquid flow test on the cavitation pipe to obtain the characteristic parameters of the cavitation pipe under the work...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 张志浩于新宇彭小波张玺
Owner BEIJING XINGJI RONGYAO SPACE TECH CO LTD