Why should turbine blades be re-installed in the same location after removal?

Re-installing turbine blades in the same location after removal is crucial for maintaining the balance of the turbine wheel. Turbine blades are individually manufactured and tuned to specific aerodynamic profiles and weight characteristics. When blades are swapped between positions, it can alter the overall weight distribution and balance of the rotor assembly. This imbalance can cause excessive vibrations during operation, leading to premature wear and potential failure of components or even catastrophic engine failure.

By ensuring that each blade is returned to its original position, the balance and aerodynamic performance of the turbine are preserved, which is vital for efficient operation and longevity. This balance not only enhances performance but also helps in minimizing mechanical stresses that arise from operable imbalances, safeguarding the turbine's integrity.