Miniature measurement rake for wind tunnel test, and 3D printing method thereof

Abstract

The invention belongs to the field of measurement rake manufacturing, and particularly relates to a miniature measurement rake for a wind tunnel test, and a 3D printing method thereof. The measurementrake comprises: a measurement rake head, a measurement rake main body, a measurement rake base, a thermocouple wiring groove and a plurality of internal vent pipes; the measurement rake head, the measurement rake main body and the measurement rake base are sequentially connected; the plurality of internal vent pipes are disposed in the measurement rake head and extend into the measurement rake main body; and the thermocouple wiring groove extends from the measurement rake head onto the measurement rake main body. Through the 3D printing technology, the degree of freedom of the mechanical design of the measurement rake can be improved, the size of the measurement rake is effectively controlled, and the manufacturing time of the measurement rake is shortened; and a thermocouple and a pressure measurement pipe are integrated on the same measurement rake, so that integrated collection of flow field parameters can be realized, the number of measurement rakes is reduced, the interference ofthe measurement rake on a flow field is reduced, and the clogging of a flow channel is reduced under the premise of ensuring sufficient flow field information.

Description

technical field [0001] The invention belongs to the field of measuring rake manufacturing, and in particular relates to a miniature measuring rake used in wind tunnel tests and a 3D printing method thereof. Background technique [0002] Measuring rake is an important device for collecting flow field parameter information in wind tunnel test. In wind tunnel test, measuring rake is used to collect data such as pressure and temperature of internal flow field or external flow field. In the engine nacelle inlet test, it is necessary to use a measuring rake to measure the pressure at the fan surface of the inlet to illustrate that the aerodynamic characteristics of the inlet under different working conditions can ensure that the engine intake is uniform and meets the flow requirements; In the jet flow test, it is necessary to use a measuring rake to measure the pressure and temperature of a certain section of the nozzle to calculate whether the performance of the nozzle meets the ...

AI Technical Summary

Problems solved by technology

When carrying out the wind tunnel test with jet flow, it is necessary to measure the flow field parameters of the nozzle internal flow, and the space of the nozzle culvert flow channel is limited, which increases the requirement that the measuring rake accounts for no more than 6% of the blockage of the flow channel. Using the traditional Measuring rakes designed by mechanical processing have many size constraints, which will inevitably cause contradictions between the number of measurement parameters and the degree of clogging

Images