Reliable Turbomachinery Blade Design and Aeromechanical Simulation

Engineers need advanced simulation tools to enable them to meet customer demands for more-efficient and reliable high-performance machines. Engineers must accurately predict aerodynamic performance across an increasingly wide range of speeds and operating conditions, and they also must guarantee reliability in the design. For example, they need to ensure that blade vibration will be damped across the operating range and that cyclic unsteady loading will not impact design life. Watch the video to see how reliable turbomachinery blades can be designed using ANSYS solutions.

ANSYS provides a complete workflow aimed at helping engineers design reliable turbomachinery blading.

  • Automated, rapid and high-quality 3-D hexahedral blade row (rotor and stator) meshing
  • Accurate CFD simulations to determine key performance indicators, like total pressure ratio and isentropic efficiency along the entire speed line
  • Efficient transient blade row (TBR) models to simulate transient full 360- degree blade phenomena by simulating only a limited sector of the system
  • Turbomachinery-specific workflow to ensure that all blade natural frequencies and modes of vibration are aerodynamically damped. This is made possible by determining frequencies and modes in ANSYS Mechanical, then importing them as blade deformation into ANSYS CFX, performing a transient CFD simulation under these deformation conditions and assessing the stability of the blade (for example, will the flow damp or excite the vibration?).
  • Turbomachinery-specific workflow to determine stresses caused by unsteady flow pressure fluctuations on the blade. This is made possible by determining the unsteady flow pressure loads on the blade using TBR methods in ANSYS CFX. The information is then mapped to the blade geometry in ANSYS Mechanical and stresses are determined.

ANSYS Turbogrid  

ANSYS TurboGrid creates high quality hexahedral meshes in turbomachinery blade passages for excellent boundary layer resolution, accurately predicting the stagnation point on the blade.

ANSYS CFX computes the pressure ratio of a blade system 

ANSYS CFX computes the pressure ratio of a blade system, rotor and stator of a compressor stage, as a function of the typical range fraction of choked mass flow rate. All typical fraction of choked mass flow rate of a complete speed line are considered.

TBR methods in ANSYS CFX 

Computation of stresses caused by unsteady flow pressure fluctuations on the blade. This is made possible by determining the unsteady flow pressure loads on the blade using TBR methods in ANSYS CFX. The information is then mapped to the blade geometry in ANSYS Mechanical where stresses are determined.