The procedure to determine manufacturing tolerances for the laminar airfoil is explained using the CFD (computational fluid dynamics) analysis. This procedure is applied to a laminar airfoil for the tolerance of the forward-facing step and rearward-facing step. In the CFD analysis the Langtry-Menter SST Transition model is used to simulate a natural transition over the laminar airfoil. The computed tolerances showed good agreement with experimental data.

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