Modeling method for non-axisymmetric end wall of axial flow impeller
A non-axisymmetric, axial flow impeller technology, applied in the non-axisymmetric end wall modeling of the impeller, and the modeling field of the non-axisymmetric end wall of the axial flow impeller
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[0043] For a typical non-axisymmetric end wall structure that is concave near the suction surface and protrudes near the pressure surface, follow the steps below:
[0044] Step 1: In such as figure 1 In the molding channel of an axisymmetric end wall 1 shown, the end wall area is divided into several axial sub-areas. For example, the peripheral control lines of -20%, 0%, 20%, 40%, 60%, 80%, 100%, and 120% Cax enclose the modeling area of the non-axisymmetric end wall, where 0% Cax means that the blade front Edge in the axial position, 100%Cax represents the position of the blade trailing edge in the axial direction. The circumferential control line adopts the third-order Fourier series curve.
[0045] Step 2: The different axial positions of the end wall of the compressor impeller in step 1 are respectively used to construct a third-order Fourier series curve, and the starting point of the Fourier series curve is located on the suction surface of the blade. The Fourier se...
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