Wind blowing and precipitation system and rainfall simulation method

Abstract

The invention provides a wind blowing and precipitation system, which is used for airplane windscreen rain removal system tests. The wind blowing and precipitation system comprises a wind blowing system, a precipitation system and a measurement and control system, wherein the wind blowing system adopts a straight-flow low-speed wind tunnel and a variable-frequency fan is arranged in the wind tunnel; the precipitation system comprises a water pump and a precipitation device, the water pump delivers tap water to the precipitation device, the precipitation device comprises a frame and a wing-shaped plate installed in the frame, a plurality of nozzles are arranged at the rear edge of the wing-shaped plate, and the spray direction of the plurality of nozzles is in parallel with the chord length direction of the wing-shaped plate; the measurement and control system comprises a wind speed sensor, a rainfall sensor and a controller, wherein the controller adjusts the frequency of the variable-frequency fan to adjust wind speed according to the feedback of the wind speed sensor and adjusts the revolving speed of the water pump to adjust rainfall according to the feedback of the rainfall sensor. The invention further provides a rainfall simulation method using the wind blowing and precipitation system.

Description

technical field [0001] The invention relates to a blowing and raining system and a rainfall simulation method. In particular, it relates to a method for simulating the rainfall environment under a certain rainy day condition on the ground by using a blowing and showering system when conducting a test of a windshield and rain removal system in a laboratory. Background technique [0002] When testing the windshield and rain removal system in the laboratory, how to truly simulate the rainfall environment is very important. If the rainfall environment is not realistic, it cannot reflect the actual performance of the windshield and rain removal system. [0003] At present, when verifying the performance of the aircraft windshield and rain removal system, the vertical rain method is used to simulate the rainfall. This rain method does not consider the influence of the incoming wind speed on the windshield and rain removal system during the actual flight, such as the windshield wip...

AI Technical Summary

Problems solved by technology

[0003] At present, when verifying the performance of the aircraft windshield and rain removal system, the vertical rain method is used to simulate the rainfall. This rain method does not consider the influence of the incoming wind speed on the windshield and rain removal system during the actual flight, such as the windshield wiper system. , the high-speed airflow will have a certain impact on the pressing force of the wiper arm and the fit between the wiper blade and the surface of the windshield, thus affecting the rain removal effect of the wiper system; The spraying range and spraying uniformity on the surface of the windshield have a great influence, thus affecting the deraining effect of deraining liquid

The laboratory can simulate the relative speed between the windshield glass and the free flow through wind tunnel blowing, but if the high wind speed rainfall simulation adopts the vertical rain method, it is difficult for the raindrops to penetrate the blowing layer, which will cause uneven rainfall at high wind speeds

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