| Citation: | LIU Yongping, ZHA Jun, HU Zhe, et al. Correlation correction of aerodynamic characteristics in heavy gas medium[J]. Journal of Aerospace Power, 2025, 40（10）：20230748 doi: 10.13224/j.cnki.jasp.20230748
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The steady transonic aerodynamic characteristics of supercritical airfoil RAE2822 and CHN-T2 in heavy gas and air were calculated by CFD. Based on the transonic similarity law and critical specific heat ratio, aerodynamic data in heavy gas medium were converted to data in equivalent air medium. The results showed that the surface pressure distributions in these two media were in good agreement with each other. For flutter tests, the slope of the lift coefficient curve and pitch moment coefficient curve at small angles of attack raised concern, after similarity correction, the slope values obtained in heavy gas medium was less than 2% different from that in air medium, which met the requirements of flutter test.
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