| The Steam-powered Catapult is the main ejection mechanism for the carrier aircraft to take off. It helps the carrier aircraft taking off quickly, reducing takeoff distance and improving its combat to response capabilities. The interior ballistic process of Steam-powered Catapult is an important factor which affects the carrier aircraft takeoff and the safety of launching. The Steam-powered Catapult is introduced in this thesis and the physical process of Steam-powered Catapult is analyzed. The theoretical analysis and the numerical simulation on the interior ballistic performance of Steam-powered Catapult are studied, and the parameters of Steam-powered Catapult are designed.The main parts are concluded as follow:a) The classical interior ballistic model of Steam-power Catapult launching process is established and calculated. The different effects of its ballistic performance are analyzed.b) The one-dimension model of Steam-power Catapult launching process is established and calculated. The numerical examples of shock tube, perfect gas doing work in the cylinder are calculated to inspect and verify the program. The bottom of the piston pressure, the carrier aircraft moving law and the pressure distribution of cylinder at different times are analyzed. Through analyzing the process of condensed steam flow in the cylinder, it provides a theoretical basis for the Steam-powered Catapult design.c) The two-dimension model of Steam-power Catapult launching process is established and calculated. The pressure field and velocity field in the launch cylinder are analyzed, and the carrier aircraft moving law is given by the calculation.d) Combined with the classical interior ballistic process of Steam-power Catapult, the parameters of the Steam-power Catapult are designed and analyzed, and the steam supply systems are discussed.
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