Device for measuring aerodynamic force of wind tunnel rotation model

Abstract

The invention discloses a device for measuring aerodynamics force of a wind tunnel rotating model. The device comprises a rod balance, a tapered sleeve and a ball bearing, wherein the head of the rodbalance is a tapered head, and the tapered sleeve is mounted on the tapered head of the rod balance; in use, the tapered sleeve is connected to a rotating model through the ball bearing; the rod balance is provided with a force measuring unit, and the force measuring unit comprises a plurality of pieces of force measuring column beams uniformly distributed in the circumferential direction. The force measuring unit includes eight force measuring column beams uniformly distributed in the circumferential direction. The device focuses on the measurement of rolling torques, and improves the measurement precision of the rolling torques as much as possible on the basis of ensuring other five-component measurement ranges. Through the enhancement of the structural materials of various components ofthe device, the device can be applied to full-speed wind tunnel experiments such as low speed, subsonic speed, transonic speed, supersonic speed, hypersonic speed and the like as well as experimentalmodels of various rotating forms, and the device has good practicability and popularization value.

Description

technical field [0001] The invention belongs to the technical field of aerodynamic force measurement in aerospace wind tunnel dynamometer tests, in particular to a device for measuring the aerodynamic force of a wind tunnel rotation model. Background technique [0002] The high-speed, long-range, ultra-maneuverable and precise strike characteristics of missile weapons determine that the degree of refinement of its design is getting higher and higher, and its rolling aerodynamic performance design has become one of the key technical indicators of development. Therefore, higher requirements are put forward for the measurement of the rolling moment in the wind tunnel experiment of the rotation model of the projectile weapon, and the measured value of the rolling moment in the force measurement experiment of the rolling model is very small compared with other measured values, and it is difficult for the conventional balance to meet the balance range. When there is a serious mism...

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Problems solved by technology

Therefore, higher requirements are put forward for the measurement of the rolling moment in the wind tunnel experiment of the rotation model of the projectile weapon, and the measured value of the rolling moment in the force measurement experiment of the rolling model is very small compared with other measured values, and it is difficult for the conventional balance to meet the balance range. Accuracy of rolling moment measurement in wind tunnel test of projectile weapon model when there is serious mismatch

[0003] Conventional rod-type balances are fixedly connected to the model for aerodynamic measurement, and the six components are centrally arranged on the same unit at the same time for sensitivity design. Due to the influence of various factors such as design range, structure type, measurement accuracy, and stiffness distribution , it is difficult to achieve the ideal sensitivity for each component, especially for the rotation model, the rod balance designed with the conventional layout is difficult to guarantee the accuracy of the roll moment measurement, so it is necessary to redesign the form of the measurement unit, and consider Connection with the rotating model to form a device for measuring the aerodynamic force of the rotating model in the wind tunnel

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