Analysis on Energy-flow of a Bipropellant-powered Hydraulic Free Piston Engine

摘要

Bipropellant-powered hydraulic free piston engine (BHFPE),as a new type of HFPE,takes advantage of bipropellant in place of conventional fossil fuel,and adopts a catalytic ignition instead of the conventional spark or compression ignition.In this paper,the operational principle and working process of a BHFPE are described firstly,then the chemical formula and molar mass as well as the heating value of the bipropellant i.e.kerosene/-HTP combination are dealt with respectively.Thereafter analysis on the internal energy-flow i.e.energy input,transfer,dissipation and output,during a working cycle of the BHFPE are analyzed.Additionally the operating parameters such as working efficiency,maximum speed of the free piston assembly (FPA) and the output hydraulic energy are derived.