Aeolus Software

Turbine Sizing & Performance Analysis

PerAero is the developer of innovative turbine design software called Aeolus. This is an easy to use, graphically based system is composed of both a sizing and optimization tool for flow path design and a comprehensive meanline performance analysis. Almost any type of axial turbine and operating condition can be handled, ranging in size from miniature air drills to large hot gas expanders. The Aeolus sizing + performance package has already demonstrated exceptional robustness and accuracy for a wide range of client projects (see “Turbine Projects” page). Many of these applications required demanding software that had great versatility and provided the following capabilities: 

      – subsonic/supersonic flows

      – converging-diverging nozzles (both airfoil and drilled)

      – partial admission

      – double flow stages

      – inductions/extractions

      – most operating fluids, wet steam (ASME ’97) and real gas mixtures (NIST)

The following document compares Aeolus performance calculations with test data and other commercially available programs for 8 different types of turbines:            Aeolus Validation Results







The Aeolus meanline program is based on many years of industrial turbine design experience. It employs the same basic loss component system as AxTurb, the throughflow analysis available from TurbAero, the world-renowned design system originated by Ron Aungier and now owned by Flexware Inc. In fact, Aeolus actually serves as a useful companion program to TurbAero by providing multi-stage sizing and a rigorous meanline analysis, additional functionality that is unavailable from that design system. In order to further reduce design time, a new feature has been developed that links Aeolus to the TurbAero system by automatically creating input files for its throughflow analysis, called AxTurb. The performance predictions from Aeolus normally compare very well with AxTurb since a common loss system is used for both

More details about this new transfer feature are available here: 


Aeolus – to – TurbAero Link

Similar Loss System

Comparisons with AxStream

Obtain needed Functionality at lower cost

Aeolus has also shown excellent agreement with AxStreamTM predictions for a 17-stage condensing steam turbine. These results and comparisons are available here: 

Aeolus and AxStream Performance Calculations for a 22 MW Steam Turbine.pdf

Aeolus provides much of the same functionality that is available today from other top commercial software but is now being offered to the turbomachinery community at significantly lower cost. Annual licenses are available for several levels of capability starting from $1,650 USD with software training and technical support included. Aeolus should indeed prove worthwhile to those requiring economical state-of-art turbine design & analysis capabilities. 

An introductory presentation on the Aeolus software can be downloaded here:


  Please contact John Perera at PerAero to try out a demo copy of Aeolus and for further technical details and pricing: