Injection head, mixing space and power unit

Abstract

An injection head for injecting fluids into a mixing space is provided, comprising a porous plate with a concave first side, which faces the mixing space, and with a second side, a partition with a first side, which faces the second side of the porous plate, and with a convex second side, at least one fluid supply space, which is arranged between the partition and the porous plate, and a plurality of injector elements, which run through the partition and the porous plate and in each case open with an outlet into the mixing space.

1 . Injection head for injecting fluids into a mixing space, comprising:
 a porous plate with a concave first side, which faces the mixing space, and with a second side;   a partition wall with a first side, which faces the second side of the porous plate, and with a convex second side;   at least one fluid supply space, which is arranged between the partition wall and the porous plate; and   a plurality of injector elements, which run through the partition wall and   
       the porous plate and in each case open with an outlet into the mixing space. 
     
     
         2 . Injection head according to  claim 1 , wherein the porous plate has an open-porous structure. 
     
     
         3 . Injection head according to  claim 1 , wherein the porous plate is produced from a ceramic material. 
     
     
         4 . Injection head according to  claim 1 , wherein the partition is fluid-tight. 
     
     
         5 . Injection head according to  claim 1 , wherein the first side of the partition wall is concave. 
     
     
         6 . Injection head according to  claim 5 , wherein the first side of the partition wall is substantially parallel to the first side of the porous plate. 
     
     
         7 . Injection head according to  claim 1 , wherein the first side and the second side of the partition wall are substantially parallel to one another. 
     
     
         8 . Injection head according to  claim 1 , wherein the second side of the porous plate is convex. 
     
     
         9 . Injection head according to  claim 8 , wherein the second side of the porous plate and the second side of the partition wall are substantially parallel to one another. 
     
     
         10 . Injection head according to  claim 1 , wherein the first side and the second side of the porous plate are substantially parallel to one another. 
     
     
         11 . Injection head according to  claim 1 , wherein the injector elements have an inlet, which opens into at least one further fluid supply space in each case. 
     
     
         12 . Injection head according to  claim 11 , wherein the further fluid supply space is delimited by the partition wall and a cover element. 
     
     
         13 . Injection head according to  claim 1 , wherein the injector elements are in each case configured so as to be fluid-tight between an inlet and the outlet. 
     
     
         14 . Injection head according to  claim 1 , wherein the injector elements pass through the fluid supply space between the porous plate and the partition wall. 
     
     
         15 . Injection head according to  claim 1 , wherein the injector elements are tubular. 
     
     
         16 . Injection head according to  claim 1 , wherein the injector elements are straight. 
     
     
         17 . Injection head according to  claim 1 , wherein the injector elements have a cylindrical annular casing. 
     
     
         18 . Injection head according to  claim 1 , wherein the injector elements are produced from a metallic material. 
     
     
         19 . Injection head according to  claim 1 , wherein the injector elements are fixed to at least one of the partition wall and the porous plate. 
     
     
         20 . Injection head according to  claim 1 , wherein the injector elements are arranged uniformly distributed. 
     
     
         21 . Injection head according to  claim 1 , wherein at least one injector element is configured as an igniter. 
     
     
         22 . Injection head according to  claim 19 , wherein the injector element(s), which are configured as igniters, are arranged centrally. 
     
     
         23 . Injection head according to  claim 1 , characterized by an axis, on which lies the centre point of a sphere of curvature of the first side of at least one of the porous plate and of the second side of the partition. 
     
     
         24 . Injection head according to  claim 23 , wherein injector elements are arranged distributed about the axis of the injection head. 
     
     
         25 . Injection head according to  claim 23 , wherein injector elements are arranged distributed with respect to the angle of their respective longitudinal axis to the axis of the injection head. 
     
     
         26 . Injection head according to  claim 23 , wherein the longitudinal axes of the injector elements intersect a plane, which contains the axis of the injection head. 
     
     
         27 . Injection head according to  claim 23 , wherein the longitudinal axes of the injector elements intersect the axis of the injection head. 
     
     
         28 . Injection head according to  claim 23 , wherein the longitudinal axes of the injector elements intersect at one point. 
     
     
         29 . Injection head according to  claim 23 , wherein the injector elements are radially oriented. 
     
     
         30 . Injection head according to  claim 23 , wherein all or the majority of injector elements are arranged inclined with respect to the axis of the injection head. 
     
     
         31 . Injection head according to  claim 1 , wherein the porous plate extends in an angular range which is less than or equal to 180°. 
     
     
         32 . Injection head according to  claim 1 , wherein a cover element is provided, an at least one further fluid supply space being arranged between the cover element and the partition wall. 
     
     
         33 . Injection head according to  claim 1 , wherein a support element, by means of which the porous plate is adapted to be supported on the injector element, is associated with an injector element. 
     
     
         34 . Injection head according to  claim 33 , wherein the support element is at least partially arranged in the fluid supply space between the partition wall and the porous plate. 
     
     
         35 . Injection head according to  claim 33 , wherein the support element is part of the injector element or arranged thereon. 
     
     
         36 . Injection head according to  claim 33 , wherein the support element is configured as a sleeve. 
     
     
         37 . Mixing chamber, comprising an injection head for injecting fluids into a mixing space, said injection head comprising:
 a porous plate with a concave first side, which faces the mixing space, and with a second side;   a partition wall with a first side, which faces the second side of the porous plate, and with a convex second side;   at least one fluid supply space, which is arranged between the partition wall and the porous plate; and   a plurality of injector elements, which run through the partition wall and the porous plate and in each case open with an outlet into the mixing space.   
     
     
         38 . Mixing chamber according to  claim 37 , which is configured as a combustion chamber. 
     
     
         39 . Mixing chamber according to  claim 37 , comprising a porous inner casing for effusion/transpiration cooling. 
     
     
         40 . Mixing chamber according to  claim 39 , wherein the inner casing adjoins the injection head. 
     
     
         41 . Mixing chamber according to  claim 40 , wherein the inner casing and the porous plate are connected. 
     
     
         42 . Mixing chamber according to  claim 38 , comprising an outer casing, one or more distribution channels for cooling medium being arranged between the outer casing and the inner casing. 
     
     
         43 . Mixing chamber according to  claim 42 , wherein the distribution channel(s) are in active fluid connection with at least one supply channel for fluid in the fluid supply space between the porous plate and partition. 
     
     
         44 . Mixing chamber according to  claim 42 , wherein one or more nozzles are provided to supply cooling medium into the distribution channel(s). 
     
     
         45 . Mixing chamber according to  claim 44 , wherein the at least one nozzle is configured as a metering nozzle. 
     
     
         46 . Mixing chamber according to  claim 44 , wherein a nozzle is arranged on a wall portion, which separates the fluid supply space between the partition and porous plate and a distribution channel. 
     
     
         47 . Mixing chamber according to  claim 43 , wherein the outer casing is produced from a fiber ceramic material. 
     
     
         48 . Mixing chamber according to  claim 42 , comprising a fluid seal for the outer casing with respect to the distribution channel(s). 
     
     
         49 . Mixing chamber according to  claim 48 , wherein the fluid seal is formed by means of a foil material. 
     
     
         50 . Mixing chamber according to  claim 43 , wherein the outer casing and a cover element of the injection head are connected. 
     
     
         51 . Mixing chamber according to  claim 50 , wherein the outer casing and the cover element of the injection head are integrally connected. 
     
     
         52 . Mixing chamber according to  claim 38 , wherein a combustion space of the combustion chamber tapers in a cross section in a direction away from the injection head. 
     
     
         53 . Power unit, comprising a combustion chamber and a nozzle arranged at the combustion chamber, with a nozzle wall, wherein the combustion chamber has an inner casing and an outer casing and the outer casing of the combustion chamber is integrally connected to the nozzle wall. 
     
     
         54 . Power unit according to  claim 53 , wherein the outer casing is produced from a fiber ceramic material. 
     
     
         55 . Power unit according to  claim 53 , wherein the nozzle wall is produced from a fiber ceramic material. 
     
     
         56 . Power unit according to  claim 53 , wherein continuous fibers are present from the outer casing to the nozzle wall. 
     
     
         57 . Power unit according to  claim 53 , wherein the outer casing is reinforced at the transition region to the nozzle wall. 
     
     
         58 . Power unit according to  claim 53 , wherein the outer casing is rounded at the transition region to the nozzle wall. 
     
     
         59 . Power unit according to  claim 53 , wherein the inner casing is porous to provide an effusion/transpiration cooling. 
     
     
         60 . Power unit according to  claim 53 , wherein one or more distribution channels for cooling medium are arranged between the inner casing and the outer casing. 
     
     
         61 . Power unit according to  claim 53 , wherein the inner casing is supported on the outer casing. 
     
     
         62 . Power unit according to  claim 61 , wherein the inner casing is supported on the outer casing in the transition region to the nozzle wall. 
     
     
         63 . Power unit according to  claim 61 , wherein the inner casing is supported on the outer casing by means of an injection head, which is connected to the inner casing.