Effect of Moist Air on Transonic Internal Flow around a Plate

• DOI: 10.1299/jfst.4.546
• Publication Date: 2009-07-22T05:59:53Z
• Authors: A.B.M. Toufique H...; Shigeru MATSUO; Toshiaki SETOGUCHI; Heuy Dong KIM
• Keywords: Q1-390; Technology; Science (General); T; 0103 physical sciences; internal flow; non-equilibrium condensation; transonic flow; flow oscillation; 01 natural sciences; moist air

The unsteady phenomena in the transonic flow around airfoils are observed in the flow field of fan, compressor blades and butterfly valves, and this causes often serious problems such as the aeroacoustic noise and the vibration. In the transonic or supersonic flow where vapor is contained in the main flow, the rapid expansion of the flow may give rise to a non-equilibrium condensation. In the present study, the effect of non-equilibrium condensation of moist air on the shock induced flow field oscillation around a plate was investigated numerically. The results showed that in the case with non-equilibrium condensation, the flow field aerodynamic unsteadiness is reduced significantly compared with those without the non-equilibrium condensation.