Rocket projectile pitching moment coefficient and pressure center coefficient correction method and storage medium

Abstract

The invention provides a rocket projectile pitching moment coefficient and pressure center coefficient correction method and a storage medium. The correction method is suitable for rocket projectile aircrafts with axisymmetric spinning body shapes, tailless layouts or + and x empennage layouts, and comprises the following steps: obtaining aerodynamic characteristic parameters of a rocket projectile in an original configuration; obtaining appearance change data of the rocket projectile aircraft; constructing a pitching moment coefficient model and a pressure center coefficient model of the rocket projectile in the improved configuration; and inputting the aerodynamic characteristic parameters of the rocket projectile in the original configuration and the shape change data of the rocket projectile aircraft into the pitching moment coefficient model and the pressure center coefficient model of the rocket projectile in the improved configuration to obtain the pitching moment coefficient and the pressure center coefficient of the rocket projectile in the improved configuration so as to shorten the design period and reduce the design cost. The method can get rid of dependence on a wind tunnel test and a complex calculation process, greatly shortens the design period, reduces the design cost, and improves the design efficiency.

Description

technical field [0001] The application belongs to the technical field of coefficient correction of missile-like aircraft, and specifically relates to a correction method and a storage medium for the coefficient of pitching moment and the center of pressure coefficient of missiles. Background technique [0002] Aircraft moving in the atmosphere will generate aerodynamic forces including lift and drag under the action of air. In engineering, the aerodynamic forces experienced by aircraft in the atmosphere are usually normalized and written in the form of aerodynamic coefficients, which are collectively referred to as aerodynamic characteristics. The pitching moment coefficient and pressure center coefficient in the aerodynamic characteristics of the aircraft affect the stability and maneuverability of the aircraft, and play an important role in the design of the aircraft. When the configuration of the aircraft changes, the aerodynamic characteristics of the aircraft also chan...

AI Technical Summary

Problems solved by technology

The calculation method of engineering experience is generally used in the calculation of the initial stage of the scheme, which is fast, but the accuracy is low

The calculation progress of the CFD calculation method can meet the engineering requirements, but the pre-calculation and calculation time are longer than the engineering experience calculation method; in addition, if the configuration of the aircraft changes, it is necessary to re-perform the pre-processing and recalculate the new configuration. The flow field, cost and calculation cycle will inevitably increase

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