Method for designing wave-rider with controllable shock wave shape of basic flow field under strong geometric constraint

A technology of geometric constraints and design methods, applied to aircraft parts, ground devices, transportation and packaging, etc., can solve the problems of weak control of geometric parameters of waveriders, and achieve the effect of improving performance

Active Publication Date: 2019-04-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0003] The existing mainstream waverider design methods are mainly divided into the cone-guided waverider design method and the close waverider design method. weak

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  • Method for designing wave-rider with controllable shock wave shape of basic flow field under strong geometric constraint
  • Method for designing wave-rider with controllable shock wave shape of basic flow field under strong geometric constraint
  • Method for designing wave-rider with controllable shock wave shape of basic flow field under strong geometric constraint

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] Such as Figure 1 to Figure 4 , the invention discloses a waverider design method under strong geometric constraints with controllable shock wave shape of the reference flow field, which specifically includes the following steps:

[0032] Step (1), according to the overall requirement of aircraft, the length of waverider, the width and the reference circle radius of reference flow field are set;

[0033] In step (2), the shock wave shape is arbitrarily set according to the length and width of the waverider and the radius of the reference circle of the reference flow field, and the concavo-convexity of the shock wave shape can be specified according to the performance requirements of the waverider;

[0034] Step (3), according to the incoming flow conditions, use Taylor-Michael to solve the starting triangle;

[0035] Step (4), combined with the starting triang...

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Abstract

The invention discloses a method for designing a wave-rider with controllable shock wave shape of a basic flow field under strong geometric constraint. The method comprises the following steps: (1) setting the length and width of a wave-rider according to the general size requirement of an aircraft, and setting a basic circle radius of a basic flow field; (2) randomly defining the shock wave shapein the basic flow field, and setting the type of the shock wave according to actual situation; (3) calculating a flow field behind wave and producing the profile of the shock wave shape by combiningthe shock wave shape, starting triangle and inlet flow conditions and utilizing a method of characteristics; and (4) acquiring a leading edge curve, upper surface molded line and lower compression surface of the wave-rider by adopting a streamline tracking method in the obtained flow field behind wave to obtain a to-be-designed wave-rider. According to the method for generating a molded line of adesignated shock wave shape in a supersonic inlet flow, the shock wave shape of the basic flow field is changed, the aim of strictly controlling the geometric dimension of a wave-rider is achieved, and high lift-drag ratio and other pneumatic performance of the wave-rider is promoted.

Description

technical field [0001] The invention belongs to the field of hypersonic aircraft, and in particular relates to a waverider design method under strong geometric constraints with controllable shock wave shape of a reference flow field. Background technique [0002] The waverider is an aircraft with a streamlined structure suitable for hypersonic flight. All of its leading edges have attached shock waves. When the waverider flies, its leading edge plane coincides with the upper surface of the shock wave. The pressure produces lift, and the waverider aircraft does not need wings to produce lift, but relies on shock wave compression to generate lift and fly. The waverider is an important precursor component of a hypersonic cruise vehicle. Due to its excellent lift-to-drag ratio performance, it has become an ideal aerodynamic layout option for a hypersonic cruise vehicle. In order to meet the overall size and performance requirements of the aircraft, the length of the waverider m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64F5/00
CPCB64F5/00
Inventor 俞凯凯徐惊雷黄帅
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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