In the present research, considering the importance of appropriate design of steam turbines, a combination of Scalar and CUSP with known value of z schemes is used for numerically modeling condensation of the 2D nucleating steam flow. Considering the importance of z parameter in the CUSP scheme, effects of several different values of this parameter on the modeling of steam flows are subjected to sensitivity analysis using the combination method. Results of the improved numerical method across sensitive nucleation condensation shock zone are in good agreement with experimental data. Furthermore, numerical errors are lower than those conventional methods by up to about 80% with the mass flow rate being well stable, which indicates better satisfaction of conservation laws, and revealing efficiency of the proposed novel combination method.

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