Aerodynamic Interference Characteristics Between Rudder and Fin for Simple Control Rocket With Fixed Canard Rudder

Abstract

In order to study the aerodynamic interference characteristics between the canard rudder and tail fin of simple-control rocket with fixed canard rudder(SCR),the applicability and reliability of the numerical methods were validated firstly,and then the numerical simulation method was used to simulate and analyze the aerodynamic characteristics of the rocket. The aerodynamic parameters of the canard rudder and tail fin under different projectile lengths and different relative angles between the canard rudder and tail fin(anti-rotation angles of the canard rudder assemblies)were calculated,and the pressure distribution of the flow field of rocket was obtained by simulation. The effects of the ratio of length to diameter of the rocket and relative angle between the canard rudder and tail fin on the aerodynamic characteristics of the canard rudder and tail fin were analyzed. Calculation results show that the aerodynamic interference between the canard rudder and the tail fin is affected by the ratio of length to diameter of the rocket. When the ratio of length to diameter of the rocket reaches a certain value,the aerodynamic interference of the fixed canard to tail fin disappears,and the aerodynamic interference characteristics between the canard rudder and tail fin are also applicable to the situations of different relative angles between the canard rudder and tail fin. The research results can be used to simplify the research method of the aerodynamic characteristics for the fixed canard rudder rocket,and improve the design efficiency of its aerodynamic shape.