높은 받음각에서 축대칭 물체의 공력 해석을 위한 회전/곡률 보정

초록

This paper present an enhanced computational analysis of tangent-ogive cylinder projectile at high angles of attack, incorporating a rotation/curvature(RC) correction to the k-ω SST RANS turbulence model. The empirical constants in Menter’s RC correction are optimized using Bayesian optimization to improve surface pressure predictions, particularly on the leeward side. These constants are trained on Lamont’s experimental data for a projectile with a nose fineness ratio of 3.5 at an angle of attack of 20° and a Reynolds number of 4.0×10 based on diameter. The improved correction is then validated on Tinling’s experi- mental data, which involves a slightly shorter nose with fineness ratio of 3.0, and shows better agreement with the measured surface pressure distribution.

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