Engineering evaluation method for separation compatibility of embedded weapon projectile

Abstract

The invention discloses an engineering evaluation method for separation compatibility of an embedded weapon projectile. The engineering evaluation method comprises the following steps: 1, establishinga separation reference coordinate system and a projectile body coordinate system; 2, obtaining a relational expression between the initial separation speed VZ '0 and the initial separation acceleration aZ' 0 of any point M on the embedded weapon; 3, giving the minimum distance between the embedded weapon and the carrier aircraft and the ignition critical time to obtain an engineering evaluation formula of the aircraft-missile separation compatibility of the embedded weapon; 4, representing an engineering evaluation formula by adopting a coordinate system, and determining an area for representing the separation compatibility of the embedded weapon; and 5, calculating the acceleration aZ '0 at the initial separation moment by adopting a static wind tunnel force measurement experiment or numerical simulation data, and judging the mechanical-elastic separation compatibility according to the compatibility region defined in the step 4. The engineering evaluation method has the advantages ofsimplicity, intuitiveness, convenience in engineering application, capability of performing pre-evaluation by adopting static data and the like.

Description

technical field [0001] The invention relates to an evaluation method for the separation compatibility of embedded weapons and bullets, which can be used for the evaluation of the separation compatibility of embedded weapons and bullets, and belongs to the field of aerodynamic research. Background technique [0002] The new type of manned or unmanned combat aircraft requires high maneuverability, supersonic cruise, over-the-horizon combat capability and good stealth performance, while the traditional external weapon loading has strong aerodynamic interference, increases the radar reflection area RCS, and has additional aerodynamic Shortcomings such as resistance (accounting for about 30% of the total resistance) have seriously affected the high maneuverability and agility of the aircraft, so aircraft designers have gradually realized the importance of embedded weapon loading for high-speed stealth aircraft. [0003] Aircraft-bullet separation compatibility is one of the key t...

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Problems solved by technology

[0004] We know that the flow near the buried weapon bay is a typical cavity flow problem. When high-speed air flows through the cavity, it will cause boundary layer separation, complex shear flow will exist near the hatch, and extremely bad noise will be generated in the cabin. Unsteady flow phenomena such as the environment, and complex unsteady flow phenomena in the embedded weapon compartment may lead to unstable states such as head-up, tail lift, and lateral roll during the separation process of the embedded weapon and the carrier aircraft (the separation of the aircraft and bombs is not compatible) , so it is of great engineering application value to seek an evaluation method for the separation compatibility of embedded weapons and ammunition

[0005] The methods for evaluating and predicting the separation compatibility of embedded weapons and ammunition include: wind tunnel drop experiment, wind tunnel capture trajectory experiment (CTS) and numerical simulation, etc., but there is a lack of engineering empirical formula method evaluation

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