Research on the Flow Field Characteristics of Cased Telescoped Ammunition Expanding Wave Guns with Muzzle Brakes under Parallel Barrel Firing

Cased telescoped ammunition expanding-wave guns represents an innovative ammunition concept that combines a two-stage ignition system with expanding-wave gun technology, resulting in an external-flow-field formation mechanism fundamentally different from that of conventional artillery. A three-dimensional, unsteady, two-component compressible gas-flow model was developed using the realizable k–ε turbulence model to simulate the jet dynamics, with system-specific interior-ballistic equations and muzzle-brake effects incorporated. Three firing configurations were compared: a single barrel without a muzzle brake, dual-barrel without muzzle brakes, and dual-barrel equipped with muzzle brakes. The results show that simultaneous dual-barrel firing induces strong jet interactions, producing a high-pressure mixing region and a shock-wave structure that is more complex than that observed in the single-barrel case. The addition of muzzle brakes significantly modifies the expansion behavior of the propellant gas. Without brakes, the dual-barrel flow exhibits three jet regions separated by four oblique shocks. With muzzle brakes installed, each brake generates three primary shock waves, redirects a substantial portion of the flow energy toward radial expansion, and produces lateral venting jets whose radial velocity exceeds the axial component. These lateral jets intensify inter-barrel flow interference and promote the formation of a core interaction region. These findings provide insight into the formation and interference mechanisms of multi-barrel expanding-wave guns with muzzle brakes and offer a theoretical basis for the design of low-recoil, low-signature artillery systems.

کلیدواژه ها:

The Cased Telescoped Ammunition ، Numerical Computation ، Tail-Jet Flow Field ، Dual-barrel firing ، Muzzle Flow Field Evolution Characteristics