Freitag, 25.02.2022

TTB High Temperature Test Bench for 1,700 °C and Mach 0,8

How are aircraft turbines developed and how are they optimized in terms of noise emission and consumption? In addition to reworking the combustor, it is very important to improve the turbine blades. For better power density, they have to withstand significantly higher temperatures, some of which are above the melting point of their material. There are several ways to further increase the temperature resistance:

1. Geometry of the blade
2. Internal cooling
3. Surface coating, e.g. with ceramics.

Since it is difficult to test such improved parts in flying equipment, special test rigs are required.

MK Technology has developed such test benchs and made them ready for series production. The special feature of the facility is that it can test in areas that previously seemed impossible. Max. 1,700 °C at a flame exit velocity of Mach 0.8 would melt any conventional test rig within a very short time. Thanks to a special coating and multi-zone film cooling, this system can be used to test under conditions that were previously impossible.

For this purpose, the material samples or turbine blades are clamped in a specimen holder that rotates and also mimics centrifugal forces. Additional salt injection and exposure to cold air simulate the toughest operating conditions. The new technology will help make aircraft quieter, more effective and more economical in the future.