Daimler-Benz DB 007
The Daimler-Benz 670 (RLM designation 109-007) was the first functional turbofan engine, also known as the turbofan engine, the first test of which took place on April 1, 1943.
Work began in 1941 under the direction of Karl Leist (born January 20, 1901 Berlin, † May 10, 1960 Stanggaß). Leist had led the development of turbochargers for altitude engines at DB since 1939. The unit had a counter-rotating axial compressor, the outer rotor of which was provided with 8 inwardly directed blades. In addition, it had 3 outer rows of blades that were directed into the bypass flow. The inner runner had 9 rows that were directed outwards. The two common rotors were driven by a single-stage turbine via a planetary gear, which was operated with a partial load for cooling reasons. The design pressure ratio is = 8. Here, too, the compressor design was carried out by the Aerodynamic Research Institute in Göttingen (AVA), but there was a later alternative design by Voith in Heidenheim . The combustion chamber consisted of 4 tubular combustion chambers that were arranged in a ring. The number was later increased to 5. The selected bypass ratio was 2.42, the static thrust 13.7 kN (1,400 kp). The further development of the DB 670 was canceled by the RLM in March 1944 as a result of the war situation and the priority of fighter aircraft.
literature
- Kyrill von Gersdorff and Kurt Grasmann: The German aviation - aircraft engines and jet engines , Bernard & Graefe publishing house