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Four-component tubular wind tunnel balance with transverse jet

A wind tunnel balance, four-component technology, applied in measurement devices, instruments, aerodynamic tests, etc., can solve the problem that the temperature effect of the balance is large, the influence of the balance measurement of the jet medium gas pipeline cannot be eliminated, and the measurement accuracy is difficult to meet. Indicator requirements and other issues, to achieve the effect of small size, reduced deformation, and increased output signal

Pending Publication Date: 2019-12-20
INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the horizontal jet wind tunnel test of slender and elongated bodies such as missiles, the existing type of wind tunnel balance cannot meet the test requirements. The existing rod-type balance structure cannot eliminate the impact of the jet flow medium gas pipeline on the balance measurement; secondly, because the jet flow disturbance force and moment are much smaller than the model aerodynamic force and moment, it is necessary to accurately measure this small It is necessary to require the balance to have high sensitivity and high resolution. This is a typical problem of large-capacity balances measuring small quantities.
Although the ring balance can solve part of the gas supply problem, the measurement accuracy is difficult to meet the index requirements; the third is the large temperature effect of the balance

Method used

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  • Four-component tubular wind tunnel balance with transverse jet
  • Four-component tubular wind tunnel balance with transverse jet
  • Four-component tubular wind tunnel balance with transverse jet

Examples

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Effect test

Embodiment 1

[0021] This example figure 2 As shown, the present embodiment is a separate use method of the horizontal jet four-component tube wind tunnel balance of the present invention and the test model. In this embodiment, the test model is designed and processed separately, and the mounting cone hole of the test model is matched with the mounting cone in front of the balance. The wind tunnel balance of this embodiment is applicable to multiple test models and has versatility. However, the jet flow chamber is located in the balance cone, limited by the structure of the model and the balance, the jet flow chamber cannot be very large; in addition, the air hole on the balance cone must be accurately matched with the nozzle inlet of the model and the sealing performance is good, which gives the model Machining places high demands.

Embodiment 2

[0023] This example Figure 6 As shown, this embodiment is an integrated use mode of the balance and the test model of the horizontal jet four-component tube wind tunnel balance of the present invention. In this embodiment, the integrated design and processing of the nozzle section of the test model and the balance, that is, the nozzle section of the test model is the balance head 8 . The advantage of this method is that there is no sealing problem of jet high-pressure gas, and the jet chamber can be made relatively large, but the balance has no versatility.

[0024] These two methods can well avoid the influence of the gas supply system on the balance measurement, and can be widely used in the wind tunnel test of the horizontal jet flow of the slender spiral body.

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Abstract

The invention discloses a four-component tubular wind tunnel balance with transverse jet, and the wind tunnel balance is integrally in a rod-shaped structure and comprises, from front to back, a balance and model installation cone, a balance Y-Mz element strain beam, a balance Z-My element strain beam, and a balance and pole installation cone, wherein a through hole is defined along the central axis of the wind tunnel balance, and the through hole is a jet medium gas pipeline. The four-component tubular wind tunnel balance with transverse jet provided by the invention can solve the interference of the jet medium gas pipeline to the balance measurement, and can accurately measure the aerodynamic forces and moments of the test model in the X and Y directions. The wind tunnel balance is smallin size and strong in versatility, and can be widely used in wind tunnel test with transverse jet of slender bodies.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel test devices, and in particular relates to a horizontal jet four-component tube type wind tunnel balance. Background technique [0002] The wind tunnel balance is a measurement device used in the wind tunnel to measure the aerodynamic force and moment of the airflow acting on the model. It can decompose the aerodynamic force and moment along three mutually perpendicular coordinate axes and make accurate measurements. Its working mechanism is as follows: the wind tunnel balance is structurally designed with structural elastic elements that induce strain under specific loads, such as lift elements and drag elements. On these structural elastic elements, resistance strain gauges are pasted to form a Wheatstone bridge. Each bridge is mainly aimed at the load on one degree of freedom. According to the electrical signal output of each bridge, it can be calculated and acted on the test model. aerody...

Claims

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Application Information

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IPC IPC(8): G01M9/06
CPCG01M9/062
Inventor 张长丰万利强张鑫向光伟
Owner INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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