Effects of condensing moist air on shock induced oscillation around an airfoil in transonic internal flows |
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| Authors: | A.B.M. Toufique Hasan S. Matsuo T. Setoguchi A.K.M. Sadrul Islam |
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| Affiliation: | 1. Department of Mechanical Engineering, Bangladesh University of Engineering and Technology (BUET), Dhaka-1000, Bangladesh;2. Department of Advanced Technology Fusion, Saga University, Saga 840-8502, Japan;3. Institute of Ocean Energy, Saga University, Saga 840-8502, Japan;4. Department of Civil and Environmental Engineering, Islamic University of Technology (IUT), Gazipur-1704, Bangladesh;1. Department of Arts and Sciences, Ahsanullah University of Science and Technology (AUST), Dhaka–1208, Bangladesh;2. Department of Mathematics, Bangladesh University of Engineering and Technology (BUET), Dhaka–1000, Bangladesh;3. Department of Mathematics, Jahangirnagar University (JU), Savar, Dhaka–1342, Bangladesh |
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| Abstract: | Shock induced oscillation around an airfoil in transonic internal flow fields are often observed due to complex shock wave boundary layer interaction. However, in actual flow where finite amount of water vapor is present in the air, the rapid expansion of the flow may give rise to non-equilibrium condensation. Effects of condensing moist air on unsteady shock induced oscillation were numerically studied for total back pressure to reservoir pressure ratios of 0.73–0.65. Results showed that in case with condensing moist air flows, the root mean square of shock induced pressure oscillation and the oscillation frequency were reduced significantly compared with those without the non-equilibrium condensation. However, there was an increase of total pressure loss for condensing moist air flows. |
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