Design method of variable cross-section three-dimensional internal contraction air inlet channel matched with curved cone projectile body

Abstract

The invention discloses a design method of a variable cross-section three-dimensional internal contraction air inlet channel matched with a curved cone projectile body, which comprises the curved coneprojectile body and the variable cross-section three-dimensional internal contraction air inlet channel and comprises the following steps: 1) designing the inlet shape of the variable cross-section three-dimensional internal contraction air inlet channel and the shoulder profile shape of the air inlet channel according to the geometric shape of the curved cone projectile body and the combustion chamber inlet shape requirement; 2) dispersing the inlet molded line of the air inlet channel and the shoulder molded line of the air inlet channel; 3) solving the axisymmetric basic flow field, and performing streamline tracking in the basic flow field according to the shape of the variable cross-section three-dimensional internal contraction air inlet to obtain a corresponding streamline; 4) cutting off the streamline according to the relative position of the inlet and outlet shapes of the variable cross-section three-dimensional internal contraction air inlet channel, and performing three-dimensional arrangement on the obtained streamline to obtain a variable cross-section three-dimensional internal contraction air inlet channel compression molded surface; and 5) on the basis of the variable-cross-section three-dimensional internal contraction air inlet channel compression molded surface, carrying out geometric construction on the variable-cross-section three-dimensional internal contraction air inlet channel matched with the curved cone projectile body.

Description

technical field [0001] The invention relates to the technical field of three-dimensional inwardly contracting air inlets, in particular to a design method for a variable-section three-dimensional inwardly contracting air inlet that matches a curved cone body. Background technique [0002] Close to the space vehicle is the strategic commanding height that various aviation powers in the world are competing for. World powers represented by the United States and Russia continue to carry out research on hypersonic vehicles. The key to realizing hypersonic flight is the air-breathing propulsion system, and the most important thing is the design of the hypersonic inlet. The air inlet is located at the front end of the propulsion system of the aircraft, and is directly connected to the precursor of the hypersonic aircraft, which plays the role of compressing the incoming flow and providing as much high-pressure and low-speed airflow as possible for the downstream. [0003] During ...

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Problems solved by technology

[0004] Due to its simple structure and high volume ratio, the curved cone body is more suitable for the development of hypersonic missile aircraft. However, due to the complexity of the geometric shape of the three-dimensional inner contraction inlet, the airframe and three-dimensional inner contraction have been lacking for a long time. The integrated design method of the intake port, especially the integrated design method of the three-dimensional retractable intake port for matching the curved cone body

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