Aircraft-missile separation dynamics similar wind tunnel test method

Abstract

The invention relates to an aircraft-missile separation dynamics similar wind tunnel test method, which aims to realize dynamics similar simulation of an aircraft-missile dynamic separation process ina wind tunnel and obtain motion / aerodynamic characteristics of a carrier missile in the separation process under the action of an aircraft interference flow field, and belongs to the field of test aerodynamics. The method comprises the following steps of (1) introducing a design variable to obtain a dynamics similar parameter design method suitable for engineering, (2) according to a dynamics similar parameter design method, obtaining dynamics similar parameters of the carrier missile, (3) obtaining a wind tunnel test model of the carrier missile by utilizing the dynamics similar parametersof the carrier missile, and (4) increasing the initial separation speed or the ejection force in the wind tunnel test process, and performing test correction on insufficient vertical acceleration simulation to obtain a more realistic carrier missile separation motion characteristic result.

Description

technical field [0001] The invention relates to a similar wind tunnel test method for machine-elastic separation dynamics, which belongs to the field of test aerodynamics. Background technique [0002] Airborne weapons will be subject to the complex aerodynamic interference effect of the aircraft at the initial stage of separation from the aircraft, making their motion characteristics significantly different from those in the free flow field, and extreme situations will endanger the safety of the aircraft. Therefore, it is necessary for airborne weapons to carry out wind tunnel simulation tests before flying to study the compatibility of aircraft and bombs. There are two types of wind tunnel test methods: capture trajectory and wind tunnel model test. Among them, the wind tunnel model test needs to ensure the dynamic similarity criterion. [0003] In the high-speed wind tunnel, the similar model launch test of the aircraft-to-bullet separation dynamics must be considered in...

AI Technical Summary

Problems solved by technology

However, the heavy model method has high requirements on the density of the model, which is difficult to achieve in engineering, which brings difficulties to the wide application of the heavy model method

The light model method is easier to implement in practical applications, but there is insufficient vertical acceleration simulation, and the displacement simulation of the falling of the loaded bomb is inaccurate, which makes the aerodynamic interference simulation of the loaded bomb during the falling process unrealistic, which will lead to inaccurate attitude angles

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