A balance force-measuring device for the test of transverse jet flow effect with high-pressure seal

Abstract

The invention discloses a balance force-measuring device used for a high-pressure sealed transverse jet flow effect test. The force-measuring device of the balance adopts a rod-type balance. The central axis of the rod-type balance is provided with a mandrel. The central axis of the mandrel is provided with an airflow channel. The front end of the airflow channel is connected to high-pressure air, and the rear end of the airflow channel is connected to the rear model The horizontal jet nozzle; the mandrel is set with the front balance, the supporting beam and the rear balance in sequence from the front to the back; two diagonal contact bearings are installed between the front balance, the rear balance and the mandrel; the front balance and the rear balance are five-component measurement The force balance measures the normal force, pitching moment, lateral force, yaw moment and rolling moment of the front model and the rear model respectively. The force-measuring balance can ensure the accurate measurement of the aerodynamic characteristics of the aircraft in the state of jet flow effect under the premise of good dynamic sealing performance, which further improves the refined development level of the aircraft.

Description

technical field [0001] The invention belongs to the technical field of high-speed wind tunnel tests, and in particular relates to a balance force-measuring device for a high-pressure sealed transverse jet effect test. Background technique [0002] In the high-speed wind tunnel, in order to complete the test of the transverse jet flow effect with high-pressure sealing, it is necessary to design a special test device. The previous test device usually used a balance, a mandrel and bearings to measure the aerodynamic characteristics of the model. However, this test device needs to be further improved, and has the following disadvantages: First, it cannot simulate the jet effect of the aircraft, resulting in test There is a large difference between the state and the real flight state. For most aircraft with jet flow function, accurate aerodynamic data cannot be obtained through this test device; the second is to use a balance to measure the front model and the rear model at the s...

AI Technical Summary

Problems solved by technology

The previous test device usually used a balance, a mandrel and bearings to measure the aerodynamic characteristics of the model. However, this test device needs to be further improved, and has the following disadvantages: First, it cannot simulate the jet effect of the aircraft, resulting in test There is a large difference between the state and the real flight state. For most aircraft with jet flow function, accurate aerodynamic data cannot be obtained through this test device; the second is to use a balance to measure the front model and the rear model at the same time. The aerodynamic characteristics of the balance, in the absence of a mandrel, the front section and the back section of the balance will cause a large interference with each other due to sharing a fixed support section with relatively weak stiffness. To correct this interference, it is necessary to go through complex static Calibration and data processing will be completed, which will increase the complexity of the structural design of the balance calibration device and the work intensity of the balance calibration

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