CD-adapco's simulation solutions have a long history of handling the modeling aspects of the leading turbomachinery and power-generation companies like Lockheed Martin, NASA, GE, Liebherr, Rolls Royce, Voith, Siemens, Solar Turbines, Vestas and many others.
Customers have found CD-adapco products highly flexible for producing accurate simulation results, engineering insight, and improved productivity in a range of industries including: blade cooling and heat transfer, torque converters, turbochargers, turbines, compressors, fans and pumps, nozzles, cavities, ducts and nacelles. They include template meshers for axial and radial machines with single and multiple rows including tip-clearance gaps, highly automated tools for geometry repair and complex geometry meshing, and advanced solver methodologies for steady and transient analyses.
In general, turbo-machinery devices are multi-stage with unequal pitches for stators and rotors, and a majority of the flows are highly unsteady in nature. The choice between steady-state and transient methods for these types of applications depends on having the right balance between computational cost, accuracy and efficiency. The nonlinear Harmonic Balance method in STAR-CCM+ is an entirely new computational approach, offering the best of both worlds specifically for periodic flows.
The Harmonic Balance method in STAR-CCM+ is a full decomposition of the Navier-Stokes equations in the frequency domain where the unsteady, transient flow is represented in the frequency domain as a Fourier series in time. All transport equations for momentum, energy and turbulence are decomposed into the frequency domain on the basis of fundamental driving modes, usually a blade-passing frequency or repeating wake modes.