The newly developed rarefaction wave gun(RAVEN) can achieve low recoil momentum without decreasing the muzzle velocity of the projectile by means of delayed venting the breech.

A four-stage physical model which describes propulsion process of the newly developed rarefaction wave gun(RAVEN) is put forward,and a dynamic model of the rarefaction wave gun(RAVEN) is made using quasi one-dimensional quasi two-phase flow theory.

Rarefaction Wave Gun Propulsion and Its Application on Orthodox Guns;

Gun recoil force reduction technology mainly include out-of-battery, superlong and tandem superlong recoil,2D recoil, muzzle braking, rarefaction wave gun and electromagnetic rheologic fluid etc.

Base on the work theory of rarefaction wave gun,the models for back blast mechanism and launcher were separately established by segregate body method,and the interior ballistic circle including the dynamic venting process of venting mechanics was accurately described by nesting the interior ballistic program in the Fluent software with its user definition function.

lt shows that there are two kind of expansion waves and one kind of rotation wave in cer- tain approximat.

Aerodynamic experiment of high enthalpy expansion tube;

To obtain the rarefaction wave propagation law in the gun,the constitution of complex wave system in the rarefaction wave gun and its propagation characteristics were analyzed according to the emission characteristics of the rarefaction wave gun.