Jet Flight Patterns of Linear Shaped Charges

A typical jet flight pattern of linear shaped charges (LSCs) is studied, and analytical expressions are built for two important parameters of the angle of liner collapse line phi and jet projection angle . In order to simplify the nonlinear nature of the liner collapse behavior of LSCs, important assumptions are made, including (1) a constant jet projection velocity at the given standoff distance and (2) the liner collapse occurs in a steady-state fashion, generating a single straight collapse line during the detonation. Based on the assumptions, analytical expressions are derived and the result is compared with side-view images of LSC jet flight to evaluate accuracy and applicability. The analytical approach delivers reasonable accuracy in a given range and is applicable to a short range of standoff distances.