Author(s)

Shigeru Matsuo, Kazuyuki Yokoo, Junji Nagao, Yushiro Nishiyama, Toshiaki Setoguchi, Heuy Dong Kim, Shen Yu

Department of Advanced Technology Fusion, Saga University, Saga, Japan.
Graduate School of Science & Engineering, Saga University, Saga, Japan.
Institute of Engineering Thermophysics, Chinese Academy of Science, Beijing, China.
Institute of Ocean Energy, Saga University, Saga, Japan.
School of Mechanical Engineering, Andong National University, Andong, Korea.

Characteristics of transonic flow over an airfoil are determined by a shock wave standing on the suction surface. In this case, the shock wave/boundary layer interaction becomes complex because an adverse pressure gradient is imposed by the shock wave on the boundary layer. Several types of passive control techniques have been applied to shock wave/boundary layer interaction in the transonic flow. Furthermore, possibilities for the control of flow fields due to non-equilibrium condensation have been shown so far and in this flow field, non-equilibrium condensation occurs across the passage of the nozzle and it causes the total pressure loss in the flow field. However, local occurrence of non-equilibrium condensation in the flow field may change the characteristics of total pressure loss compared with that by non-equilibrium condensation across the passage of flow field and there are few for researches of locally occurred non-equilibrium condensation in a transonic flow field. The purpose of this study is to clarify the effect of locally occurred non-equilibrium condensation on the shock strength and total pressure loss on a transonic internal flow field with circular bump. As a result, it was found that shock strength in case with local occurrence of non-equilibrium condensation is reduced compared with that of no condensation. Further, the amount of increase in the total pressure loss in case with local occurrence of non-equilibrium condensation was also reduced compared with that by non-equilibrium condensation across the passage of flow field.

Compressible; Transonic; Shock Wave; Non-Equilibrium Condensation; Simulation

Matsuo, S. , Yokoo, K. , Nagao, J. , Nishiyama, Y. , Setoguchi, T. , Kim, H. and Yu, S. (2013) Numerical Study on Transonic Flow with Local Occurrence of Non-Equilibrium Condensation. Open Journal of Fluid Dynamics, 3, 42-47. doi: 10.4236/ojfd.2013.32A007.