Taking multi-stage steam turbine design beyond the barrier of perfection

Optimization Case study of a multi-stage steam turbine designed by Franco Tosi Meccanica


This case study details the design optimization of an axial steam turbine of 160 MW, focusing on maximizing the total-to-total isentropic efficiency of the last three low-pressure stages of the turbine. Specifically, the engineers considered the shape and angle of the blades. After more than one century of development, it is the advances in blade design that have contributed to improved steam turbine thermal efficiency. Since modern turbines already reach efficiency values beyond 90%, extracting any further improvement is a very challenging task. The engineers used a combination of three engineering approaches for this study to accomplish this: traditional trial-and-error, virtual optimization and direct optimization. The final verification of the steam turbine after the optimization, achieved an isentropic total-to-total efficiency gain of about 0.5% -- a small but vital improvement in today’s highly competitive, highly regulated market.

<h5>Franco Tosi Meccanica SpA</h5>
Franco Tosi Meccanica SpA

Dive deeper

Please login or register to gain access to this contents.

Find out more:



Explore Pervasive Engineering Simulation

ANSYS offers a comprehensive software suite that spans the entire range of physics, providing access to virtually any field of engineering simulation that a design process requires


Read More  


Stay connected with our news, analysis and trends from our experts


Read More  


Scroll through our Media Center to view all the videos, video-tutorials and recorded webinars

Media Center  


CFD Characterization of the Ventricular Assist Device HeartAssist 5® Through a Sliding Mesh Approach

Analysis to determine possible optimizations to enhance device safety and efficacy for long-term patient use

This technical article describes how high-end numerical Computational Fluid Dynamics (CFD) simulations were applied to mimic the realistic operating conditions of a Ventricular Assist Device (VADs) and analyze its hemodynamics in order to identify potential areas for optimization of the device’s performance, safety and efficacy.

ansys cfd biomechanics

Read More