Wind tunnel test device for aerodynamic characteristics and manipulation characteristics of flexible parafoil

Abstract

The invention discloses a wind tunnel test device for aerodynamic characteristics and control characteristics of a flexible parafoil. The wind tunnel test device comprises a foundation rack, a wind tunnel balance, an attack angle changing mechanism, an attack angle measurement device, a parachute cord installation frame, and a control case. The attack angle changing mechanism is disposed on the foundation rack, and is connected with a parachute cord mounting frame through the wind tunnel balance. The attack angle measurement device is arranged on the parachute cord mounting frame, the parachute cord mounting frame is connected with the parafoil through a parachute cord, and the control case is fixedly arranged on the parachute cord mounting frame and connected with the parafoil through a control cord. According to the wind tunnel test device, measurement of the aerodynamic characteristics and the manipulation characteristics of the parafoil in a wind tunnel test is realized.

Description

technical field [0001] The invention relates to the technical field of parafoil equipment, in particular to a wind tunnel test device for aerodynamic characteristics and handling characteristics of a flexible parafoil. Background technique [0002] As a parachute with a flexible wing structure, the parafoil has the advantages of small folding volume and light weight. At the same time, due to its unique airfoil structure, it has excellent gliding and maneuverability performance, and is widely used in spacecraft fixed-point recovery, precise airdrop and life-saving materials. It has great military and civilian value in missions such as delivery. [0003] The research on the aerodynamic characteristics and handling characteristics of the parafoil is the basis for the research and design of the parafoil system. At present, the traditional research method of the aerodynamic characteristics and the handling characteristics of the parafoil is obtained through the airdrop test, whic...

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Problems solved by technology

[0003] The research on the aerodynamic characteristics and handling characteristics of the parafoil is the basis for the research and design of the parafoil system. At present, the traditional research method of the aerodynamic characteristics and the handling characteristics of the parafoil is obtained through the airdrop test, which is expensive and expensive, and the obtained test Incomplete data, such as parafoil control force cannot be measured

[0004] Wind tunnel test is the main means of measuring the aerodynamic characteristics of parafoils. The objects of early wind tunnel tests of parafoils were basically rigid parafoils or semi-rigid parafoils with canopy wrapping rigid skeletons. They could only measure the static aerodynamic characteristics of parafoils. It cannot reflect the real mechanical characteristics of the flexible parafoil, and because the model is rigid, the trailing edge of the parafoil cannot be deflected, so the maneuvering characteristics of the parafoil cannot be measured

For flexible parafoils, parafoils face many difficulties such as difficulty in changing the angle of attack, difficulty in measurement, and insufficient overall stability in the wind tunnel.

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