A burner system configured for bringing to reaction at least two preheated and pressurized fluid compounds to produce a controlled continuous sequence of pulsing detonations or explosions, wherein, after said detonations or explosions are initiated, said detonations or explosions are maintained by use of directed and controlled infrared radiation, said burner system comprising: a) two or more inlets (1,2) configured for introducing into said burner system said at least two preheated and pressurized fluid compounds; b) an inlet chamber (3,4) connected to each of said inlets (1,2), each inlet chamber (3,4) configured to prevent a preheated and pressurized fluid compound that enters it from mixing with a preheated and pressurized fluid compound that enters another of said inlet chambers (3,4); c) one long, small diameter friction channel configured at a first end to receive said preheated and pressurized fluid compounds from at least two of said inlet chambers (3,4) and to mix them; d) one reaction chamber adapted at an inlet end to be connected to a second end of said friction channel in order to receive said preheated and pressurized mixed fluid compounds that flow through said friction channel; e) one or more outlet channels adapted to be connected to an outlet end of said reaction chamber in order to conduct the products produced in explosions or detonations that take place in said reaction chamber away from said reaction chamber; and f) an ignition system, adapted to initiate pulsed operation of said burner system; said burner system characterized in that, the shape of the interior walls of said reaction chamber are: conical at said inlet end, hemispherical at said outlet end, and cylindrical between said inlet end and said outlet end; wherein, in said reaction chamber said at least two preheated and pressurized fluid compounds react to produce a controlled continuous sequence of pulsing detonations or explosions, wherein each detonation or explosion is followed by an interval during which no reaction takes place, wherein: i) a small part of a shock wave produced by each detonation or explosion travels out of said reaction chamber into said friction channel; and ii) the remainder of said shock wave strikes the interior walls of said reaction chamber causing said interior walls to emit infrared radiation, which is directed towards and focused by the shape of said interior walls of said reaction chamber at selected locations within said reaction chamber; and wherein said small part of said shock wave produced by each detonation or explosion that travels into said friction channel flows in the opposite direction to the flow of said at least two fluid compounds thereby temporarily blocking the flow of said at least two fluid compounds into said reaction chamber and creating said interval until friction between said small part of said shock wave and the walls of said friction channel dissipates the energy of said small part of the shock wave in said friction channel, whereupon the pressure of said at least two preheated and pressurized fluid compounds and a vacuum created behind said shock wave of said detonation or explosion travelling in said friction channel causes said at least two preheated and pressurized fluid compounds to resume flowing into and filling said reaction chamber until they reach a location in said reaction chamber at which said emitted infrared radiation is focused by the shape of said interior walls, whereupon said focused infrared radiation ignites said two preheated and pressurized fluid compounds. a) two or more inlets (1,2) configured for introducing into said burner system said at least two preheated and pressurized fluid compounds; b) an inlet chamber (3,4) connected to each of said inlets (1,2), each inlet chamber (3,4) configured to prevent a preheated and pressurized fluid compound that enters it from mixing with a preheated and pressurized fluid compound that enters another of said inlet chambers (3,4); c) one long, small diameter friction channel configured at a first end to receive said preheated and pressurized fluid compounds from at least two of said inlet chambers (3,4) and to mix them; d) one reaction chamber adapted at an inlet end to be connected to a second end of said friction channel in order to receive said preheated and pressurized mixed fluid compounds that flow through said friction channel; e) one or more outlet channels adapted to be connected to an outlet end of said reaction chamber in order to conduct the products produced in explosions or detonations that take place in said reaction chamber away from said reaction chamber; and f) an ignition system, adapted to initiate pulsed operation of said burner system; i) a small part of a shock wave produced by each detonation or explosion travels out of said reaction chamber into said friction channel; and ii) the remainder of said shock wave strikes the interior walls of said reaction chamber causing said interior walls to emit infrared radiation, which is directed towards and focused by the shape of said interior walls of said reaction chamber at selected locations within said reaction chamber;