3D Transonic Viscous Inverse Design Code
- Mainly applicable to transonic axial fans and turbines.
- Rotating and stationary components.
- Method 1 - The loading distribution or derivative of circumferentially averaged swirl velocity, as in TURBOdesign1, is specified together with blade normal thickness.
- Method 2 - The surface static pressure Loading, ΔP (=P+ – P-) is specified together with the normal thickness.
- Possible to use both Analysis and Design Modes.
- Existing blade geometry can be read in and only certain parts of the blade is modified by changes to the loading distribution.
- Interactive modification of thickness, streamwise and spanwise loading distribution.
Basic features of TURBOdesign2
TURBOdesign2 is an Aero/Hydro-dynamic design software for turbomachinery blades based on a 3D viscous transonic inverse design method. It was developed mainly for the design of turbomachinery components such as transonic fans where shock/boundary layer interaction effects are significant.
Theory and Flow Model
- Flow solution is provided using cell-vertex, finite volume formulation of the Euler Equations.
- Equations are solved by Runge-Kutta time marching scheme for asymptotic steady solution with added artificial viscosity (Jameson, 1981).
- Viscous effects are included using body force method and log law at the walls.
- Solver is used with normal wall boundary conditions in the case of Method 1.
- Wall boundary conditions are modified to allow flow transpiration when pressure loading is specified as input (Method 2).
Competitive advantages of TURBOdesign2
TURBOdesign2 has been specifically developed for design of highly transonic axial fans where shock/boundary layer interaction has a very significant effect. Its application to the design of these of types of turbomachines can offer many advantages:
- Shorten aerodynamic design times by allowing designers to rapidly optimize the blade surface pressure distributions.
- Allow designers to re-camber the blade profiles with ease in order to achieve a specified pressure ratio or work distribution. This is particularly true in Method 1, where the rVθ distribution is specified.
- Control the 3D pressure field on the rotor.