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Upper surface blowing power simulation ground test device

A test device and a technology for simulating the ground, applied in the field of aerodynamics, can solve problems such as the inability to install large-radius flaps, small flow distance, and reduced efficiency, and achieve the effects of deduction of constraints, stable jet flow field, and large control range Effect

Active Publication Date: 2020-12-29
LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the position of the embedded engine behind, the flow distance between the engine nozzle and the blowing flap on the upper surface is relatively small. In order to improve the cruising efficiency, the closure angle of the wing trailing edge is too small to install the traditional large-radius flap. The difficulty of jet deflection due to the arrival effect increases, and the efficiency of power increase by using the upper surface blowing technology decreases

Method used

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  • Upper surface blowing power simulation ground test device
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  • Upper surface blowing power simulation ground test device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] refer to figure 1 and figure 2 As shown, the present invention discloses a ground test device for air blowing power simulation on the upper surface, the test device at least includes an air source interface 1, a flow meter 2, an air bridge 3, a measuring support frame 4, a balance 5 and a jet flow simulation device 6,

[0035] Preferably, the flow meter 2 is located on the downstream side of the air source interface 1 . Further, the flowmeter is a 2-position Venturi flowmeter, which is used to accurately measure the flow of gas flowing through the jet simulation device.

[0036]Preferably, one end of the air bridge 3 is fixed on the measuring support frame 4 and communicated with the flow meter 2 , and the other end is fixed on the jet simulation device 6 and connected with the air source communication pipe 7 . The confinement effect of the high-pressure gas supply line on the balance 5 is thus reduced via the air bridge 3 .

[0037] Further, the air bridge 3 inclu...

Embodiment 2

[0050] refer to Figure 3 to Figure 6 shown. On the basis of Embodiment 1, the thrust vector deflection control device provided at the nozzle of the nozzle section 13 can be configured as follows.

[0051] Preferably, the thrust vector deflection control device includes at least a downward deflection flap 101 and a side deflection flap 102 .

[0052] Under the condition that the nozzle area of ​​the nozzle section 13 is controlled to be constant, by controlling the downward deflection angle θ of the downward deflection flap 101 1 The deployment deflection angle with the side deflection flap 102 completes the adjustment of the initial velocity of the jet flow at the nozzle section 13 and the spatial distribution of the jet flow.

[0053] The present invention modifies the nozzle through the combined control of the downward deflection flap 101 and the side deflection flap 102. Under the premise of ensuring that the effective area of ​​the nozzle remains unchanged and does not ...

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PUM

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Abstract

The invention discloses an upper surface blowing power simulation ground test device. The test device at least comprises a balance and a jet flow simulation device, wherein the jet flow simulation device is arranged on the balance, and thrust vector characteristic measurement of the jet flow simulation device is completed through the balance. According to the upper surface blowing technology dynamic simulation ground test device, the test device can be used for carrying out a thrust vector deflection test based on the Coanda effect, the state of the jet flow simulation device can be controlledin real time by controlling the flow, thrust vector deflection angles and deflection efficiency in different states can be obtained through the balance, and by replacing upper surface blowing flaps,the test device can be used for thrust vector control optimization model selection in different states; and the test device is high in flow measurement precision, large in control range and stable injet flow field, the influence of an air bridge is corrected, the constraint influence of an air supply pipeline is deducted, and the measurement precision is high.

Description

technical field [0001] The invention belongs to the technical field of aerodynamics, and relates to an upper surface air blowing power simulation ground test device, in particular to an upper surface air blowing power simulation ground test device which realizes power increase control based on the Coanda effect. Background technique [0002] The air blowing technology on the upper surface uses the engine jet to attach to the curved surface, and the jet is deflected at a large angle under the Coanda effect to generate a considerable aerodynamic lift. The first application of the concept of air blowing on the upper surface is NASA's QSAR and Boeing's YC-14 demonstrator projects. The only model aircraft that uses air blowing on the upper surface is the AN-72. The Coanda effect deflects the high-speed jet flow of the engine along the upper surface of the curved flap, increases the flow velocity, increases the circulation around the wing, and obtains high lift performance. [00...

Claims

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Application Information

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IPC IPC(8): G01M9/08G01M9/06
CPCG01M9/06G01M9/08
Inventor 张刘姜裕标黄勇章荣平赖庆仁汪军陈辅政李昌
Owner LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT