Method for calculating simulated leakage rate

Abstract

The invention discloses a method for calculating a simulated leakage rate, which comprises the following steps of: inserting one end of a capillary tube into a simulated cavity, extending the other end of the capillary tube to the outside of the simulated cavity, and filling pressure gas into the simulated cavity through an inlet; and b, calculating the length of the capillary tube required duringleakage according to the mass flow of the capillary tube. Leakage resistance is controlled through the capillary tube, the capillary tube is inserted after the cavity wall of the simulation piece ispunched, flow resistance is adjusted by adjusting the length of the capillary tube, control over local flow loss is converted into control over on-way loss, the tiny leakage amount is simulated and calculated, and the tiny leakage amount can be simulated with high precision. Test cost and test difficulty of the ground performance test of the micro-leakage equipment are effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of aviation air pressure monitoring, in particular to a calculation method of simulated leakage. Background technique [0002] When the aircraft is flying at high altitude, there is a pressure difference between the inside and outside, and the pipeline or equipment that is not completely sealed will cause leakage, such as radar waveguide, etc. The radar waveguide is connected to the radar for the conduction of electromagnetic waves. Sealing, there is a small leakage (0.8~2g / h) in the radar waveguide, the air pressure in the waveguide will gradually decrease to the ambient pressure, the pressure drop will affect the transmission of electromagnetic waves in the waveguide, and may cause the waveguide to catch fire and damage the radar, so the design A pressurization system is used to pressurize the waveguide. In order to verify the performance of the pressurization system, a ground performance simulation test i...

AI Technical Summary

Problems solved by technology

[0002] When the aircraft is flying at high altitude, there is a pressure difference between the inside and outside, and the pipeline or equipment that is not completely sealed will cause leakage, such as radar waveguide, etc. The radar waveguide is connected to the radar for the conduction of electromagnetic waves. Sealing, there is a small leakage (0.8~2g / h) in the radar waveguide, the air pressure in the waveguide will gradually decrease to the ambient pressure, the pressure drop will affect the transmission of electromagnetic waves in the waveguide, and may cause the waveguide to catch fire and damage the radar The booster system is used to boost the waveguide. In order to verify the performance of the booster system, a ground performance simulation test is required.

[0003] However, because most of the aircraft equipment is expensive, or due to the large volume and quantity (such as the entire pipeline system), the ground performance test is carried out with real equipment with small leaks, and the test site is demanding and expensive.

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