Method for designing single-arc pressure surface blade profile of steam turbine
A design method and single-arc technology, applied in the field of impeller machinery, can solve problems such as increasing blade processing costs, achieve broad market application prospects and competitiveness, excellent blade processing technology and aerodynamic efficiency.
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Embodiment 1
[0027] A steam turbine with a drum stage blade, the specific parameters are: back pressure is 8.7bar, flow rate is 20kg / s, isentropic efficiency is 98%, total inlet pressure is 10bar, and total inlet temperature is 633K.
[0028] like figure 1 As shown, a steam turbine single-arc pressure surface airfoil design method is composed of the following modules: the existing single-arc pressure surface airfoil database, the conventional airfoil geometric characteristic parameter database; the twelve-parameter single-arc Pressure surface airfoil construction module; new single-arc airfoil modeling module; existing airfoil single-arc parameterization module; plane cascade CFD calculation module. The above modules iterate each other until the airfoil performance parameters meet the design requirements. The steps are:
[0029] Step 1: Transmit the blade modeling requirements to the geometric feature parameter database of the existing single-arc pressure surface airfoil and conventional...
Embodiment 2
[0037] Parametric fitting is carried out on the existing airfoil of a certain drum stage of a steam turbine, and the isentropic efficiency of this airfoil is 97.5%.
[0038] A method for designing a single-arc pressure surface airfoil of a steam turbine, the method is composed of the following modules:
[0039] Existing single-arc pressure surface airfoil database, conventional airfoil geometric feature parameter database; 12-parameter single-arc pressure surface airfoil construction module; new single-arc airfoil modeling module; existing airfoil single-arc parameterization Module; plane cascade CFD calculation module. The above modules iterate each other until the airfoil performance parameters meet the design requirements. The steps are:
[0040] Step 1: Transmit the blade modeling requirements to the geometric feature parameter database of the existing single-arc pressure surface airfoil and conventional airfoil, and screen the geometric feature parameter boundaries of t...
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