Features Supported

Cloud Leo has been designed to support the analysis of axisymmetric rotating machinery operating in ideal gases from Mach .005 to Mach 3.5.  Though Cloud Leo has been designed to support a wide range of geometric features, input formats and analysis types, we encourage you to check your needs against these lists. 

Analysis Types

Feature Cloud Leo Support
2D cascade analysis Yes
3D single row steady analysis Yes
3D multi-row steady analysis Yes, meshed in Code Wand, defined by several airfoil sections (5 recommended) for each main and splitter blade
3D time accurate analysis Yes, study blade row interaction effects, endwall secondary flow
Automated speedine generation Yes, requires one converged operating point at desired rotational speed; user selectable iteration levels

Section Data Input Formats

Supported Input Format Cloud Leo Support
(x,rθ,r) Defined trailing edge to trailing edge
(x1,y1,z1,x2,y2,z2) Defined leading edge to trailing edge
CFX format (x,y,z) Defined leading edge to leading edge
Suction(x,y,z) & Pressure(x,y,z) Defined leading edge to trailing edge
(x1,y1,y2) Defined leading edge to trailing edge at a given spanwise location
(x,y) at constant radius Defined trailing edge to trailing edge at a given spanwise location
(x1,rθ1,x2,rθ2) Defined leading edge to trailing edge at a given spanwise location
(x1,rθ1,x2,rθ2,r1,r2) Defined leading edge to trailing edge
(x1,t1,r1,x2,t2,r2) Defined leading edge to trailing edge
(-y1,x1,-y2,x2) Defined leading edge to trailing edge at a given spanwise location
(x1,rθ1 all) Read spanwise location, then all x1 values then all rθ1 values

Geometry Features

Feature Cloud Leo Support
Axial rotors and vanes Yes, meshed in Code Wand, defined by several airfoil sections (5 recommended)
Radial impellers Yes, meshed in Code Wand, defined by several airfoil sections (5 recommended)
Radial impellers with splitters Yes, meshed in Code Wand, defined by several airfoil sections (5 recommended) for each main and splitter blade
Tip clearances Yes, meshed in Code Wand, defined by distance from endwall at leading edge, mid-chord and trailing edge
Hub clearances Yes, meshed in Code Wand, defined by distance from endwall at leading edge, mid-chord and trailing edge
Tip treatments (e.g. squealer tips) No
Bleed/leakage flow Modeled in Code Leo; set at inner or outer diameter endwalls upstream or downstream of the airfoil
Recirculation ports Modeled in Code Leo; set upstream and downstream port locations and geometries
Knife edge seals Modeled in Code Leo, set number of knife edge seals, clearance and rotation speed at inner and outer diameter endwalls
Fillets Yes, pressure or suction side at hub or tip, may specify constant or variable radius.  Support for variable fillets with cutoff trailing edges, useful for radial impellers
Cooling flow Modeled in Code Leo, can inject cooling flow uniformly across a plane for bookkeeping purposes
Film cooling holes Modeled in Code Leo, can specify local cooling flow injection by row of uniform holes or by individual hole locations
Clocking Yes
Rotating inner drum Yes
Volutes No
Non-axisymmetric casing treatments No