Design method of multi-stage variant gliding waverider aircraft in wide speed range based on cone-guided theory

Abstract

The invention relates to the technical field of aerodynamic configuration design of gliding aircrafts, in particular to a wide-speed-domain multistage variant gliding waverider aircraft designing method based on a cone-derived theory. The designing method comprises the following steps that S1, a flight speed domain range and a task requirement of a gliding aircraft are given, a flight Mach number range is extracted according to the flight speed domain range and the task requirement, and the stage number of multistage gliding waveriders and design Mach numbers of the gliding waveriders are determined; S2, a fixed shock wave angle and upper surface trailing edge lines of the multistage gliding waveriders are given, and the design Mach numbers of the gliding waveriders are used as design parameters to design all stages of waveriding faces; S3, the upper surfaces of the waveriders are established, the bottom surface of the first-stage gliding waverider serves as the bottom surface of the multistage gliding waveriders, and the bottom surface and all stages of waveriding faces form a multistage variant gliding waverider aircraft structure. The speed domain range of aircraft design is widened, and the method can well adapt to and meet the wide-speed-domain flight task requirement.

Description

technical field [0001] The invention relates to the technical field of aerodynamic shape design of a gliding aircraft, in particular to a design method of a multi-stage modified gliding waverider aircraft in a wide speed range based on the cone-guided theory. Background technique [0002] Hypersonic aircraft refers to aircraft flying in the atmosphere and transatmospheric at a speed of Mach 5 or higher. According to whether such aircraft need engines to provide thrust during flight, they can be divided into unpowered gliding and powered cruising. kind. Among them, the hypersonic gliding vehicle does not need fuel and engines, so it is relatively simple to implement. For this kind of aircraft, it will carry out unpowered gliding flight after re-entering the atmosphere. Increasing the range is an important goal in the design of the gliding section. Ensuring good aerodynamic performance during the entire gliding process is a necessary prerequisite. Among them, the most importa...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a design method for multi-stage variant gliding waveriders in a wide speed range based on the cone-guiding theory, which solves the defect of unstable aerodynamic performance of the waverider in a wide speed range, and makes the waveriders in the whole gliding flight process All have waveriding characteristics, can better adapt to and meet the requirements of flight missions in a wide speed range, and have a high lift-to-drag ratio during the whole flight process

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