TPS reverse thrust nacelle thrust calibration test method

Abstract

The invention discloses a TPS reverse thrust nacelle thrust calibration test method comprising a partition, a bell mouth, a rectifying device, a ventilation strut, a support base, an air bridge, an intake steel pipe, a thrust balance and a measuring system. In the thrust calibration test, the thrust balance measures the thrust generated by the TPS reverse thrust nacelle, the actual thrust of the nacelle is obtained after the air bridge and the labyrinth seal influence are corrected, and the ratio of the theoretical thrust and the actual thrust is calculated to obtain a thrust calibration coefficient of the corresponding state. The method provided by the invention has high precision of thrust calibration by measuring the thrust generated by the TPS reverse thrust nacelle through the thrustbalance, improves the accuracy of balance measurement by reducing the influence of high pressure air pipeline on balance measurement through the air bridge, and improves the safety and reliability ofthe reverse thrust calibration test by preventing the reverse tail jet of the TPS reverse thrust nacelle from the re-inhalation of the nacelle air intake through the partition.

Description

technical field [0001] The invention relates to the field of wind tunnel tests, in particular to a TPS anti-thrust nacelle calibration test method for calibrating the thrust characteristics of the TPS anti-thrust nacelle in the wind tunnel test. Background technique [0002] The TPS reverse thrust test technology is a test technique for studying the influence of the engine thrust reverser opening on the aerodynamic characteristics of the aircraft in a wind tunnel. In the TPS reverse thrust test, the wind tunnel balance measures the sum of the aerodynamic force of the aircraft model and the thrust of the TPS reverse thrust nacelle. Therefore, the thrust of the TPS reverse thrust nacelle must be deducted from the balance measurement to obtain the reverse thrust The amount of influence on the aerodynamic characteristics of the aircraft model. The thrust of the TPS reverse thrust nacelle cannot be accurately measured in the TPS reverse thrust wind tunnel test, and it needs to b...

AI Technical Summary

Problems solved by technology

The thrust of the TPS reverse thrust nacelle cannot be accurately measured in the TPS reverse thrust wind tunnel test, and it needs to be calibrated with a special thrust calibration test device

[0003] When the thrust reverser is turned on, the tail jet of the TPS reverse thrust nacelle will be deflected toward the air inlet, and it will be easily re-sucked by the nacelle air inlet, which will cause the TPS fan to surge and damage the fan blades. Some TPS positive thrust nacelle thrust calibration devices do not have a device to block the reverse jet (the device needs to be separated from the thrust balance to avoid affecting the thrust balance measurement), therefore, it is impossible to use the existing TPS positive thrust nacelle thrust calibration device for TPS Reverse thrust nacelle for thrust calibration

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