manner for the optimal construction of the opening 16 the supply channel 11 is provided with a nose shaped indentation 17 extending from one wall radially past the central axis and a diffusor 18 arranged offset to the latter within the outer housing 7 of the gas turbine a pipe shaped branch line 19 from the supply channel 11 is provided the branch line 19 runs approximately horizontal starting from the supply channel 22 opposite the nose shaped indentation 17 extending approximately parallel to the rotor axis into the combustion chamber 8 the branch line 19 protrudes through the wall 20 of the combustion chamber and reaches into the inside of the combustion chamber with its nozzle shaped end 21 the end 21 being fan shaped beyond the nose shaped indentation 17 and leading into the opening 16 the supply channel 11 forms a first component current and a second component current is formed in the branch line 19 the current cross section of the branch line is sized in such a manner that there is an essential pressure drop this pressure drop in the branch line 19 is considerably greater than the pressure drop in the first component current a medium flowing through the supply channel 11 is thus directed to the blade wheel 3 of turbine mainly by the first component current and the opening 16 arranged outside and separate from the gas turbine is an exhaust gas source not shown connected to the supply channel 11 as a particularly suitable version this exhaust gas source can be an exchangable solid exhaust cartouche for starting the gas turbine the exhaust gas source is ignited and the hot exhaust gases flow through the supply channel 11 in a straight line.