Pressure measuring device for preventing probe from icing through rotary rake

Abstract

The invention, which relates to the technical field of icing wind tunnel pressure measurement, discloses a pressure measuring device for preventing a probe from icing through a rotary rake. The pressure measuring device comprises a pressure measuring rake with a pressure measuring probe. The pressure measuring rake has a hollow paddle-shaped structure with a hollow shaft; and the hollow structureof the pressure measuring rake is communicated with the cavity of the hollow shaft. In addition, the device also incudes a driving positioning device mounted on the outer surface of an air inlet channel; and a rotating shaft of the driving positioning device is in driving connection with the hollow shaft of the pressure measuring rake. According to the invention, when an air inlet channel icing test is carried out, a pressure measuring rake is rotated by the driving positioning device to enable the pressure measuring probe to be against an incoming flow direction with the back and positioningis performed, so that the pressure measuring probe is protected from being iced and the rotating angle of the pressure measuring rake is not influenced by the air flow; when the air inlet channel pressure measurement test is carried out, the pressure measuring probe faces the incoming flow direction directly to measure the pressure and the distribution, so that multi-times mounting and dismountingof the pressure measurement rake and related parts are avoided and thus the damage to the air inlet channel caused by repeated mounting and dismounting is reduced. The working time of the related personnel in a low-temperature environment is shortened and the test efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of pressure measurement in an icing wind tunnel, in particular to a pressure measurement device that prevents a probe from freezing through a rotating rake. Background technique [0002] In the simulation test of measuring the icing of the engine intake port, a pressure measuring rake is often used to measure the flow field pressure. However, the commonly used pressure measuring rake is to fix the rake body on the outer surface of the air inlet, and the inner diameter of the pressure measuring probe is usually less than 1mm. It is difficult to effectively prevent the probe from icing with the general anti-icing method. Therefore, the effective method in the test is to remove the fixed pressure measuring rake before the icing test, and block the installation hole with a cover plate. After the icing test is completed, install the pressure measuring rake to conduct the pressure measuring test. In this way, the...

AI Technical Summary

Problems solved by technology

In this way, the repeated disassembly and assembly of the pressure measuring rake will take a certain amount of test time, and the disassembly and assembly may cause damage to the model and bending or even breaking of the probe, increasing the working time of relevant personnel in low temperature environments and reducing the test efficiency

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