Probe used for total pressure measurement of rotorcraft

Abstract

The invention belongs to the technical field of aerospace total pressure probes and specifically relates to a probe used for total pressure measurement of a rotorcraft. The probe solves the problem that total pressure sensing accuracy of a total pressure probe of the rotorcraft is poor due to influences of a downwash airflow component and also solves the problem that a total atmosphere pressure cannot be detected under a low forward speed. The two probes are installed symmetrically on the left and the right of the rotorcraft, installation positions are located on a flow line of a downwash airflow of a helicopter, the probe has a non-convolution body shape, a front end face of a pressure sensing hole in the front end is designed to form an inclined angle relative to an incoming flow direction, the pressure sensing hole in the front end turns the back to the downwash airflow direction, and an inner conical angle of the pressure sensing hole in the front end is smaller than or equal to 30 DEG. In comparison with the prior art, the probe used for the total pressure measurement of the rotorcraft provided by the invention effectively increases total pressure sensing accuracy during utilization of the total pressure probe in the rotorcraft and increases a low-speed applicable scope of the total pressure probe.

Description

technical field [0001] The invention belongs to the technical field of aerospace total pressure probes, and in particular relates to a probe for measuring the total pressure of a rotorcraft, which is suitable for detecting the total pressure signal of the oncoming airflow during the flight of the rotorcraft, and the total pressure signal is used for calculation Flight parameters related to flight speed. Background technique [0002] The total pressure is an important atmospheric parameter during the flight of the aircraft. It is sensed by the total pressure probe installed outside the skin of the aircraft, and the total pressure signal sensed by the total pressure probe is transmitted to the air data computer to calculate the flight parameters related to the speed. [0003] The total pressure probe of the aircraft is usually designed in the shape of a gyratory body. The front end is vertically opened with a pressure sensing hole with a taper. The cone angle is generally 60°....

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the total pressure probe of the rotorcraft is affected by the downwash airflow component, the total pressure sensing accuracy is poor, especially when the forward speed is low, the problem that the total pressure of the atmosphere cannot be detected at all, and provides a method for Probe for total pressure measurement of rotorcraft

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