Supersonic parachute numerical simulation method considering fabric breathability
A numerical simulation, air permeability technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the parachute aerodynamic performance, stability gap, low density, supersonic parachute canopy materials for Mars and research and design work Difficulties and other problems, to achieve the effect of high degree of visualization and easy analysis
Active Publication Date: 2019-12-31
CENT SOUTH UNIV
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[0003] As we all know, a parachute is woven from a flexible fabric, which has the characteristics of flexibility and air permeability, especially the air permeability is one of the important indicators of the parachute fabric. The aerodynamic characteristics of the parachute are largely determined by the air permeability of the parachute, but the parachute During the development and design, because the air permeability characteristics of the canopy fabric were not considered in the process of wind tunnel test, launch test and numerical simulation, there was always a certain gap between the obtained parameters such as aerodynamic performance and stability of the parachute and the design value
In addition, the parachute opening and working conditions of the Mars parachute are more characterized by supersonic speed and low density, which has caused great difficulties and challenges to the canopy material and development and design of the Mars supersonic parachute
At present, there are calculation methods for subsonic parachute air permeability (refer to: air permeability calculation method for canopy fabric, invention patent CN 101727541 B) and aerodynamic performance method (a parachute aerodynamic performance analysis method considering fabric air permeability, invention patent CN103544053 B) It has been unable to meet the aerodynamic analysis and design requirements of supersonic parachutes considering fabric air permeability, so there is an urgent need in engineering for a numerical simulation method that can analyze the impact of supersonic parachute fabric air permeability
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[0050] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.
[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the application clearer, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application, usually in the drawings here Components of the described and illustrated embodiments of the present application can be arranged and designed in various configurations, so the described embodiments are only part of the embodiments of the present application, and should not be construed as limiting the protection scope of the present application.
[0052]In the description of this application, the orientation descriptions, such as up, dow...
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The invention discloses a supersonic parachute numerical simulation method considering fabric breathability. According to the method, the aerodynamic performance problem of the supersonic breathable parachute can be accurately, quantitatively and qualitatively analyzed, the engineering requirement for supersonic parachute fabric breathability analysis at present is effectively met, and necessary theoretical support and technical reserve can be provided for design and development of the supersonic parachute under the Mars atmospheric condition in a Mars exploration task. Compared with an existing subsonic parachute air permeability analysis method, the method has the following advantages that 1, the unsteady change rules of various parameters such as pressure and speed around a parachute canopy and inside the parachute canopy can be analyzed in detail, the influence mechanism of air permeability is easy to analyze, and a qualitative and quantitative relation is formed; 2, atmospheric conditions and supersonic compressible conditions of Mars can be handled, and the visualization degree is high.
Description
technical field [0001] The present application relates to the technical field of parachute aerodynamic performance research, in particular to a numerical simulation method for a supersonic parachute considering fabric air permeability. Background technique [0002] In Mars exploration missions, the parachute system plays a vital role when the Mars rover decelerates and lands after entering the Martian atmosphere. [0003] As we all know, a parachute is woven from a flexible fabric, which has the characteristics of flexibility and air permeability, especially the air permeability is one of the important indicators of the parachute fabric. The aerodynamic characteristics of the parachute are largely determined by the air permeability of the parachute, but the parachute During the development and design, because the air permeability characteristics of the canopy fabric were not considered in the process of wind tunnel test, launch test and numerical simulation, there was always...
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IPC IPC(8): G06F17/50
Inventor 薛晓鹏贾贺荣伟温志湧王奇汪运鹏蒋伟
Owner CENT SOUTH UNIV