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<< Click to Display Table of Contents >> Blade properties |
  
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<< Click to Display Table of Contents >> Blade properties |
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► STATOR | Blade properties 
In principle, the same features are available as for the blade properties of impellers.
To support the selection of a suitable blade count a separate dialog can be used, which can be started by pressing the button right beside the edit field.
The outlet angles αTE are input values for most of the blade types according to the desired change of flow direction. Slip models are not available for stators. Some angle oversizing should be considered if necessary.
For blade shape "Straight 2D (axial)", a diffuser opening angle ϑ is calculated and displayed for information in accordance to Bohl with:
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where a4 and a5 are LE and TE blade passage distance (expressed by equivalent diameters) and l is the mean line length.
Problem |
Possible solution |
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A reasonable thermodynamic state could not be calculated. [ for compressors and turbines only ] |
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The dimensions might be too tight for the specified mass flow and inlet conditions. The chosen blade angles might also yield this state. |
Increase the dimensions (width etc.), change blade angle or change the Global setup (e.g. decrease mass flow). |
Diffuser opening angle bigger than 10°. Flow separation possible. [ for Straight 2D (axial) only ] |
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The diffuser opening angle is to big and might give room for flow separation. |
Change αBLE, s1, s2, LE or TE radius (in meridian) |