Propulsion device, flying object comprising the same and propulsion device igniting method

Abstract

A propulsion device operated in a bi-propellant mode uses a safe hydrogen peroxide as oxidizer and yet has high specific impulse and high response performance. A preheated net 18 is provided in a combustion chamber 14 . Both of an oxidizer supply means 10 and a fuel supply means 12 open toward the net 18 . Oxidizer 30 and fuel 32 are atomized on the net 18 to thereby increase the surface area. At the same time, the oxidizer 30 and fuel 32 are heated on the net 18 and their decomposition is accelerated. By quickly effecting collision and mixing of the oxidizer 30 with the fuel 32 , an instantaneous ignitability can be obtained.

1 . A propulsion device comprising; 
 a preheating means provided in a combustion chamber,    a liquid fuel supply means opening toward said combustion chamber,    a surface area increasing means provided in said combustion chamber,    an oxidizer supply means opening toward said combustion chamber,    an oxidizer storing means connected to said oxidizer supply means and hydrogen peroxide stored in said oxidizer storing means.    
     
     
         2 . A propulsion device as claimed in  claim 1 , wherein at least one of an orientation to which said liquid fuel supply means opens and an orientation to which said oxidizer supply means opens includes a vector toward said surface area increasing means.  
     
     
         3 . A propulsion device as claimed in  claim 1 , further comprising a preheating means, that supplies heat, connected to said surface area increasing means.  
     
     
         4 . A propulsion device as claimed in  claim 1 , wherein said surface area increasing means is formed in any one shape selected from the group of a net shape, a laminated net shape in which a plurality of nets are laminated and a honeycomb shape.  
     
     
         5 . A propulsion device as claimed in  claim 1 , wherein a chemical species of said surface area increasing means is any one or more selected from the group of silver, platinum, palladium, ruthenium and iridium.  
     
     
         6 . A propulsion device as claimed in  claim 5 , wherein said surface area increasing means comprises a support made of a ceramic and a catalyst arranged in contact with said support and a chemical species of said catalyst is any one or more selected from the group of silver, platinum, palladium, ruthenium and iridium.  
     
     
         7 . A flying object comprising a propulsion device as claimed in  claim 1 .  
     
     
         8 . A flying object as claimed in  claim 7 , wherein said flying object is any one of an artificial satellite, an on-trajectory working station, a lunar probe, a planet probe, a guided aerospace craft and a launch vehicle.  
     
     
         9 . A propulsion device igniting method comprising the steps of; 
 preheating a surface area increasing means provided in a combustion chamber (a preheating step),    supplying a liquid fuel into said combustion chamber (a fuel supply step),    causing said liquid fuel to contact with said surface area increasing means (a fuel contacting step),    supplying an oxidizer into said combustion chamber (an oxidizer supply step) and    causing said oxidizer to contact with said surface area increasing means (an oxidizer contacting step).    
     
     
         10 . A propulsion device igniting method as claimed in  claim 9 , wherein at least one of an orientation to which said liquid fuel is supplied and an orientation to which said oxidizer is supplied includes a vector toward said surface area increasing means.  
     
     
         11 . A propulsion device igniting method as claimed in  claim 9  wherein said preheating step is a step of supplying said surface area increasing means with heat.  
     
     
         12 . A propulsion device igniting method as claimed in  claim 9 , wherein a chemical species of said oxidizer is hydrogen peroxide.  
     
     
         13 . A propulsion device as claimed in  claim 2 , further comprising a preheating means, that supplies heat, connected to said surface area increasing means.  
     
     
         14 . A propulsion device igniting method as claimed in  claim 10 , wherein said preheating step is a step of supplying said surface area increasing means with heat.