The interaction between gas turbines and airborne particles determines detrimental effects on the performance, efficiency, reliability of power unit. When it is possible, reduced by use inlet separators filtration systems. In an aero engine, these barriers are difficult to implement, only bigger (usually greater than 10 μm) separated from airflow. Small units, especially those equips helicopter...

Abstract The paper describes an approach for determining the technical state of axial compressor as part a gas turbine unit, based on thermogasdynamic parameters that are measured at operating facility. As criterion condition, it is proposed to use ratio actual efficiency reference in such modes. To do this, enough know temperatures and pressures air inlet outlet compressor. A method selecting ...

Axial flow compressors are subjected to demands for ever-increasing levels of pressure ratio at a compression efficiency that augments the overall cycle efficiency. However, unstable flow may develop in the compressor, which can lead to a stall or surge and subsequently to gas turbine failure resulting in significant downtime and cost to repair. To protect against these potential aerodynamic in...

This work deals with numerical solution of first order hyperbolic equation or system in 2D or 3D. In the first part, the solution of a 2D linear scalar equation is investigated. Using this model problem, the results of different numerical schemes are compared from the point of view of accuracy and parallel efficiency. The next part describes 2D and 3D steady numerical solutions of the transonic...